model.test.js

/**
 * Test dependencies.
 */

var start = require('./common')
  , should = require('should')
  , mongoose = start.mongoose
  , random = require('../lib/utils').random
  , Query = require('../lib/query')
  , Schema = mongoose.Schema
  , SchemaType = mongoose.SchemaType
  , CastError = SchemaType.CastError
  , ValidatorError = SchemaType.ValidatorError
  , ValidationError = mongoose.Document.ValidationError
  , ObjectId = Schema.ObjectId
  , DocumentObjectId = mongoose.Types.ObjectId
  , DocumentArray = mongoose.Types.DocumentArray
  , EmbeddedDocument = mongoose.Types.Embedded
  , MongooseNumber = mongoose.Types.Number
  , MongooseArray = mongoose.Types.Array
  , MongooseError = mongoose.Error;

/**
 * Setup.
 */

var Comments = new Schema();

Comments.add({
    title     : String
  , date      : Date
  , body      : String
  , comments  : [Comments]
});

var BlogPost = new Schema({
    title     : String
  , author    : String
  , slug      : String
  , date      : Date
  , meta      : {
        date      : Date
      , visitors  : Number
    }
  , published : Boolean
  , mixed     : {}
  , numbers   : [Number]
  , owners    : [ObjectId]
  , comments  : [Comments]
});

BlogPost.virtual('titleWithAuthor')
  .get(function () {
    return this.get('title') + ' by ' + this.get('author');
  })
  .set(function (val) {
    var split = val.split(' by ');
    this.set('title', split[0]);
    this.set('author', split[1]);
  });

BlogPost.method('cool', function(){
  return this;
});

BlogPost.static('woot', function(){
  return this;
});

mongoose.model('BlogPost', BlogPost);

var collection = 'blogposts_' + random();

module.exports = {

  'test a model isNew flag when instantiating': function(){
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    var post = new BlogPost();
    post.isNew.should.be.true;
    db.close();
  },

  'modified getter should not throw': function () {
    var db = start();
    var BlogPost = db.model('BlogPost', collection);
    var post = new BlogPost;
    db.close();

    var threw = false;
    try {
      post.modified;
    } catch (err) {
      threw = true;
    }

    threw.should.be.false;
  },

  'test presence of model schema': function(){
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    BlogPost.schema.should.be.an.instanceof(Schema);
    BlogPost.prototype.schema.should.be.an.instanceof(Schema);
    db.close();
  },

  'test a model default structure when instantiated': function(){
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    var post = new BlogPost();
    post.isNew.should.be.true;
    post.db.model('BlogPost').modelName.should.equal('BlogPost');
    post.constructor.modelName.should.equal('BlogPost');

    post.get('_id').should.be.an.instanceof(DocumentObjectId);

    should.equal(undefined, post.get('title'));
    should.equal(undefined, post.get('slug'));
    should.equal(undefined, post.get('date'));

    post.get('meta').should.be.a('object');
    post.get('meta').should.eql({});
    should.equal(undefined, post.get('meta.date'));
    should.equal(undefined, post.get('meta.visitors'));

    should.equal(undefined, post.get('published'));

    post.get('numbers').should.be.an.instanceof(MongooseArray);
    post.get('owners').should.be.an.instanceof(MongooseArray);
    post.get('comments').should.be.an.instanceof(DocumentArray);
    db.close();
  },

  'mongoose.model returns the model at creation': function () {
    var Named = mongoose.model('Named', new Schema({ name: String }));
    var n1 = new Named();
    should.equal(n1.name, null);
    var n2 = new Named({ name: 'Peter Bjorn' });
    should.equal(n2.name, 'Peter Bjorn');

    var schema = new Schema({ number: Number });
    var Numbered = mongoose.model('Numbered', schema, collection);
    var n3 = new Numbered({ number: 1234 });
    n3.number.valueOf().should.equal(1234);
  },

  'collection name can be specified through schema': function () {
    var schema = new Schema({ name: String }, { collection: 'users' });
    var Named = mongoose.model('CollectionNamedInSchema', schema);
    Named.prototype.collection.name.should.equal('users');
  },

  'test default Array type casts to Mixed': function () {
    var db = start()
      , DefaultArraySchema = new Schema({
          num1: Array
        , num2: []
        })

    mongoose.model('DefaultArraySchema', DefaultArraySchema);
    var DefaultArray = db.model('DefaultArraySchema', collection);
    var arr = new DefaultArray();

    arr.get('num1').should.have.length(0);
    arr.get('num2').should.have.length(0);

    var threw1 = false
      , threw2 = false;

    try {
      arr.num1.push({ x: 1 })
      arr.num1.push(9)
      arr.num1.push("woah")
    } catch (err) {
      threw1 = true;
    }

    threw1.should.equal(false);

    try {
      arr.num2.push({ x: 1 })
      arr.num2.push(9)
      arr.num2.push("woah")
    } catch (err) {
      threw2 = true;
    }

    threw2.should.equal(false);

    db.close();

  },

  'test a model default structure that has a nested Array when instantiated': function () {
    var db = start()
      , NestedSchema = new Schema({
          nested: {
            array: [Number]
          }
        });
    mongoose.model('NestedNumbers', NestedSchema);
    var NestedNumbers = db.model('NestedNumbers', collection);

    var nested = new NestedNumbers();
    nested.get('nested.array').should.be.an.instanceof(MongooseArray);
    db.close();
  },

  'test a model that defaults an Array attribute to a default non-empty array': function () {
    var db = start()
      , DefaultArraySchema = new Schema({
          arr: {type: Array, cast: String, default: ['a', 'b', 'c']}
        });
    mongoose.model('DefaultArray', DefaultArraySchema);
    var DefaultArray = db.model('DefaultArray', collection);
    var arr = new DefaultArray();
    arr.get('arr').should.have.length(3);
    arr.get('arr')[0].should.equal('a');
    arr.get('arr')[1].should.equal('b');
    arr.get('arr')[2].should.equal('c');
    db.close();
  },

  'test a model that defaults an Array attribute to a default single member array': function () {
    var db = start()
      , DefaultOneCardArraySchema = new Schema({
          arr: {type: Array, cast: String, default: ['a']}
        });
    mongoose.model('DefaultOneCardArray', DefaultOneCardArraySchema);
    var DefaultOneCardArray = db.model('DefaultOneCardArray', collection);
    var arr = new DefaultOneCardArray();
    arr.get('arr').should.have.length(1);
    arr.get('arr')[0].should.equal('a');
    db.close();
  },

  'test a model that defaults an Array attributes to an empty array': function () {
    var db = start()
      , DefaultZeroCardArraySchema = new Schema({
          arr: {type: Array, cast: String, default: []}
        });
    mongoose.model('DefaultZeroCardArray', DefaultZeroCardArraySchema);
    var DefaultZeroCardArray = db.model('DefaultZeroCardArray', collection);
    var arr = new DefaultZeroCardArray();
    arr.get('arr').should.have.length(0);
    arr.arr.should.have.length(0);
    db.close();
  },

  'test that arrays auto-default to the empty array': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    var post = new BlogPost();
    post.numbers.should.have.length(0);
    db.close();
  },

  'test instantiating a model with a hash that maps to at least 1 null value': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    var post = new BlogPost({
      title: null
    });
    should.strictEqual(null, post.title);
    db.close();
  },

  'saving a model with a null value should perpetuate that null value to the db': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    var post = new BlogPost({
      title: null
    });
    should.strictEqual(null, post.title);
    post.save( function (err) {
      should.strictEqual(err, null);
      BlogPost.findById(post.id, function (err, found) {
        db.close();
        should.strictEqual(err, null);
        should.strictEqual(found.title, null);
      });
    });
  },

  'test instantiating a model with a hash that maps to at least 1 undefined value': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    var post = new BlogPost({
      title: undefined
    });
    should.strictEqual(undefined, post.title);
    post.save( function (err) {
      should.strictEqual(null, err);
      BlogPost.findById(post.id, function (err, found) {
        db.close();
        should.strictEqual(err, null);
        should.strictEqual(found.title, undefined);
      });
    });
  },

  'test a model structure when saved': function(){
    var db = start()
      , BlogPost = db.model('BlogPost', collection)
      , pending = 2;

    function done () {
      if (!--pending) db.close();
    }

    var post = new BlogPost();
    post.on('save', function (post) {
      post.get('_id').should.be.an.instanceof(DocumentObjectId);

      should.equal(undefined, post.get('title'));
      should.equal(undefined, post.get('slug'));
      should.equal(undefined, post.get('date'));
      should.equal(undefined, post.get('published'));

      post.get('meta').should.be.a('object');
      post.get('meta').should.eql({});
      should.equal(undefined, post.get('meta.date'));
      should.equal(undefined, post.get('meta.visitors'));

      post.get('owners').should.be.an.instanceof(MongooseArray);
      post.get('comments').should.be.an.instanceof(DocumentArray);
      done();
    });

    post.save(function(err, post){
      should.strictEqual(err, null);
      post.get('_id').should.be.an.instanceof(DocumentObjectId);

      should.equal(undefined, post.get('title'));
      should.equal(undefined, post.get('slug'));
      should.equal(undefined, post.get('date'));
      should.equal(undefined, post.get('published'));

      post.get('meta').should.be.a('object');
      post.get('meta').should.eql({});
      should.equal(undefined, post.get('meta.date'));
      should.equal(undefined, post.get('meta.visitors'));

      post.get('owners').should.be.an.instanceof(MongooseArray);
      post.get('comments').should.be.an.instanceof(DocumentArray);
      done();
    });
  },

  'test a model structures when created': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    BlogPost.create({ title: 'hi there'}, function (err, post) {
      should.strictEqual(err, null);
      post.get('_id').should.be.an.instanceof(DocumentObjectId);

      should.strictEqual(post.get('title'), 'hi there');
      should.equal(undefined, post.get('slug'));
      should.equal(undefined, post.get('date'));

      post.get('meta').should.be.a('object');
      post.get('meta').should.eql({});
      should.equal(undefined, post.get('meta.date'));
      should.equal(undefined, post.get('meta.visitors'));

      should.strictEqual(undefined, post.get('published'));

      post.get('owners').should.be.an.instanceof(MongooseArray);
      post.get('comments').should.be.an.instanceof(DocumentArray);
      db.close();
    });
  },

  'test a model structure when initd': function(){
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    var post = new BlogPost()
    post.init({
        title       : 'Test'
      , slug        : 'test'
      , date        : new Date
      , meta        : {
            date      : new Date
          , visitors  : 5
        }
      , published   : true
      , owners      : [new DocumentObjectId, new DocumentObjectId]
      , comments    : [
                          { title: 'Test', date: new Date, body: 'Test' }
                        , { title: 'Super', date: new Date, body: 'Cool' }
                      ]
    });

    post.get('title').should.eql('Test');
    post.get('slug').should.eql('test');
    post.get('date').should.be.an.instanceof(Date);
    post.get('meta').should.be.a('object');
    post.get('meta').date.should.be.an.instanceof(Date);
    post.get('meta').visitors.should.be.an.instanceof(MongooseNumber);
    post.get('published').should.be.true;

    post.title.should.eql('Test');
    post.slug.should.eql('test');
    post.date.should.be.an.instanceof(Date);
    post.meta.should.be.a('object');
    post.meta.date.should.be.an.instanceof(Date);
    post.meta.visitors.should.be.an.instanceof(MongooseNumber);
    post.published.should.be.true;

    post.get('owners').should.be.an.instanceof(MongooseArray);
    post.get('owners')[0].should.be.an.instanceof(DocumentObjectId);
    post.get('owners')[1].should.be.an.instanceof(DocumentObjectId);

    post.owners.should.be.an.instanceof(MongooseArray);
    post.owners[0].should.be.an.instanceof(DocumentObjectId);
    post.owners[1].should.be.an.instanceof(DocumentObjectId);

    post.get('comments').should.be.an.instanceof(DocumentArray);
    post.get('comments')[0].should.be.an.instanceof(EmbeddedDocument);
    post.get('comments')[1].should.be.an.instanceof(EmbeddedDocument);

    post.comments.should.be.an.instanceof(DocumentArray);
    post.comments[0].should.be.an.instanceof(EmbeddedDocument);
    post.comments[1].should.be.an.instanceof(EmbeddedDocument);

    db.close();
  },

  'test a model structure when partially initd': function(){
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    var post = new BlogPost()
    post.init({
        title       : 'Test'
      , slug        : 'test'
      , date        : new Date
    });

    post.get('title').should.eql('Test');
    post.get('slug').should.eql('test');
    post.get('date').should.be.an.instanceof(Date);
    post.get('meta').should.be.a('object');

    post.get('meta').should.eql({});
    should.equal(undefined, post.get('meta.date'));
    should.equal(undefined, post.get('meta.visitors'));

    should.equal(undefined, post.get('published'));

    post.get('owners').should.be.an.instanceof(MongooseArray);
    post.get('comments').should.be.an.instanceof(DocumentArray);
    db.close();
  },

  'test initializing with a nested hash': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    var post = new BlogPost({
      meta: {
          date      : new Date
        , visitors  : 5
      }
    });

    post.get('meta.visitors').valueOf().should.equal(5);
    db.close();
  },

  'test isNew on embedded documents after initing': function(){
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    var post = new BlogPost()
    post.init({
        title       : 'Test'
      , slug        : 'test'
      , comments    : [ { title: 'Test', date: new Date, body: 'Test' } ]
    });

    post.get('comments')[0].isNew.should.be.false;
    db.close();
  },

  'test isNew on embedded documents after saving': function(){
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    var post = new BlogPost({ title: 'hocus pocus' })
    post.comments.push({ title: 'Humpty Dumpty', comments: [{title: 'nested'}] });
    post.get('comments')[0].isNew.should.be.true;
    post.get('comments')[0].comments[0].isNew.should.be.true;
    post.invalidate('title'); // force error
    post.save(function (err) {
      post.isNew.should.be.true;
      post.get('comments')[0].isNew.should.be.true;
      post.get('comments')[0].comments[0].isNew.should.be.true;
      post.save(function (err) {
        db.close();
        should.strictEqual(null, err);
        post.isNew.should.be.false;
        post.get('comments')[0].isNew.should.be.false;
        post.get('comments')[0].comments[0].isNew.should.be.false;
      });
    });
  },

  'test isModified when modifying keys': function(){
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    var post = new BlogPost()
    post.init({
        title       : 'Test'
      , slug        : 'test'
      , date        : new Date
    });

    post.isModified('title').should.be.false;
    post.set('title', 'test');
    post.isModified('title').should.be.true;

    post.isModified('date').should.be.false;
    post.set('date', new Date(post.date + 1));
    post.isModified('date').should.be.true;

    post.isModified('meta.date').should.be.false;
    db.close();
  },

  'setting a key identically to its current value should not dirty the key': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    var post = new BlogPost()
    post.init({
        title       : 'Test'
      , slug        : 'test'
      , date        : new Date
    });

    post.isModified('title').should.be.false;
    post.set('title', 'Test');
    post.isModified('title').should.be.false;
    db.close();
  },

  'test isModified and isDirectModified on a DocumentArray': function(){
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    var post = new BlogPost()
    post.init({
        title       : 'Test'
      , slug        : 'test'
      , comments    : [ { title: 'Test', date: new Date, body: 'Test' } ]
    });

    post.isModified('comments.0.title').should.be.false;
    post.get('comments')[0].set('title', 'Woot');
    post.isModified('comments').should.be.true;
    post.isDirectModified('comments').should.be.false;
    post.isModified('comments.0.title').should.be.true;
    post.isDirectModified('comments.0.title').should.be.true;

    db.close();
  },

  'test isModified on a DocumentArray with accessors': function(){
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    var post = new BlogPost()
    post.init({
        title       : 'Test'
      , slug        : 'test'
      , comments    : [ { title: 'Test', date: new Date, body: 'Test' } ]
    });

    post.isModified('comments.0.body').should.be.false;
    post.get('comments')[0].body = 'Woot';
    post.isModified('comments').should.be.true;
    post.isDirectModified('comments').should.be.false;
    post.isModified('comments.0.body').should.be.true;
    post.isDirectModified('comments.0.body').should.be.true;

    db.close();
  },

  'test isModified on a MongooseArray with atomics methods': function(){
    // COMPLETEME
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    var post = new BlogPost()

    post.isModified('owners').should.be.false;
    post.get('owners').$push(new DocumentObjectId);
    post.isModified('owners').should.be.true;

    db.close();
  },

  'test isModified on a MongooseArray with native methods': function(){
    // COMPLETEME
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    var post = new BlogPost()

    post.isModified('owners').should.be.false;
    post.get('owners').push(new DocumentObjectId);

    db.close();
  },

  'test isModified on a Mongoose Document - Modifying an existing record' : function(){
    var db = start()
      , BlogPost = db.model('BlogPost', collection)

    var doc = {
        title       : 'Test'
      , slug        : 'test'
      , date        : new Date
      , meta        : {
            date      : new Date
          , visitors  : 5
        }
      , published   : true
      , mixed       : { x: [ { y: [1,'yes', 2] } ] }
      , numbers     : []
      , owners      : [new DocumentObjectId, new DocumentObjectId]
      , comments    : [
          { title: 'Test', date: new Date, body: 'Test' }
        , { title: 'Super', date: new Date, body: 'Cool' }
        ]
    };

    BlogPost.create(doc, function (err, post) {
    	BlogPost.findById(post.id, function (err, postRead) {
    		//set the same data again back to the document.
    		//expected result, nothing should be set to modified
    		postRead.set(doc);

        postRead.isModified('title').should.be.false;
        postRead.isModified('slug').should.be.false;
        postRead.isModified('date').should.be.false;
        postRead.isModified('meta.date').should.be.false;
    		postRead.isModified('meta.visitors').should.be.false;
        postRead.isModified('published').should.be.false;
        postRead.isModified('mixed').should.be.false;
        postRead.isModified('numbers').should.be.false;
        postRead.isModified('owners').should.be.false;

        //uncomment this, this should the bug with respect to Embedded array
        //documents where it is set to modified even though it is not
        //postRead.isModified('comments').should.be.false;

        db.close();
    	});
    });
  },

  // GH-342
  'over-writing a number should persist to the db': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    var post = new BlogPost({
      meta: {
          date      : new Date
        , visitors  : 10
      }
    });

    post.save( function (err) {
      should.strictEqual(null, err);
      post.set('meta.visitors', 20);
      post.save( function (err) {
        should.strictEqual(null, err);
        BlogPost.findById(post.id, function (err, found) {
          should.strictEqual(null, err);
          found.get('meta.visitors').valueOf().should.equal(20);
          db.close();
        });
      });
    });
  },

  'test defining a new method': function(){
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    var post = new BlogPost();
    post.cool().should.eql(post);
    db.close();
  },

  'test defining a static': function(){
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    BlogPost.woot().should.eql(BlogPost);
    db.close();
  },

  'test casting error': function(){
    var db = start()
      , BlogPost = db.model('BlogPost', collection)
      , threw = false;

    var post = new BlogPost();
    
    try {
      post.init({
          date: 'Test'
      });
    } catch(e){
      threw = true;
    }

    threw.should.be.false;

    try {
      post.set('title', 'Test');
    } catch(e){
      threw = true;
    }

    threw.should.be.false;

    post.save(function(err){
      err.should.be.an.instanceof(MongooseError);
      err.should.be.an.instanceof(CastError);
      db.close();
    });
  },
  
  'test nested casting error': function(){
    var db = start()
      , BlogPost = db.model('BlogPost', collection)
      , threw = false;

    var post = new BlogPost();

    try {
      post.init({
          meta: {
              date: 'Test'
          }
      });
    } catch(e){
      threw = true;
    }

    threw.should.be.false;

    try {
      post.set('meta.date', 'Test');
    } catch(e){
      threw = true;
    }

    threw.should.be.false;
    
    post.save(function(err){
      err.should.be.an.instanceof(MongooseError);
      err.should.be.an.instanceof(CastError);
      db.close();
    });
  },

  'test casting error in subdocuments': function(){
    var db = start()
      , BlogPost = db.model('BlogPost', collection)
      , threw = false;

    var post = new BlogPost()
    post.init({
        title       : 'Test'
      , slug        : 'test'
      , comments    : [ { title: 'Test', date: new Date, body: 'Test' } ]
    });

    post.get('comments')[0].set('date', 'invalid');

    post.save(function(err){
      err.should.be.an.instanceof(MongooseError);
      err.should.be.an.instanceof(CastError);
      db.close();
    });
  },

  'test casting error when adding a subdocument': function(){
    var db = start()
      , BlogPost = db.model('BlogPost', collection)
      , threw = false;

    var post = new BlogPost()

    try {
      post.get('comments').push({
          date: 'Bad date'
      });
    } catch (e) {
      threw = true;
    }

    threw.should.be.false;

    post.save(function(err){
      err.should.be.an.instanceof(MongooseError);
      err.should.be.an.instanceof(CastError);
      db.close();
    });
  },

  'test validation': function(){
    function dovalidate (val) {
      this.asyncScope.should.equal('correct');
      return true;
    }

    function dovalidateAsync (val, callback) {
      this.scope.should.equal('correct');
      process.nextTick(function () {
        callback(true);
      });
    }

    mongoose.model('TestValidation', new Schema({
        simple: { type: String, required: true }
      , scope: { type: String, validate: [dovalidate, 'scope failed'], required: true }
      , asyncScope: { type: String, validate: [dovalidateAsync, 'async scope failed'], required: true }
    }));

    var db = start()
      , TestValidation = db.model('TestValidation');

    var post = new TestValidation();
    post.set('simple', '');
    post.set('scope', 'correct');
    post.set('asyncScope', 'correct');

    post.save(function(err){
      err.should.be.an.instanceof(MongooseError);
      err.should.be.an.instanceof(ValidationError);

      post.set('simple', 'here');
      post.save(function(err){
        should.strictEqual(err, null);
        db.close();
      });
    });
  },

  'test validation with custom message': function () {
    function validate (val) {
      return val === 'abc';
    }
    mongoose.model('TestValidationMessage', new Schema({
        simple: { type: String, validate: [validate, 'must be abc'] }
    }));

    var db = start()
      , TestValidationMessage = db.model('TestValidationMessage');

    var post = new TestValidationMessage();
    post.set('simple', '');

    post.save(function(err){
      err.should.be.an.instanceof(MongooseError);
      err.should.be.an.instanceof(ValidationError);
      err.errors.simple.should.be.an.instanceof(ValidatorError);
      err.errors.simple.message.should.equal('Validator "must be abc" failed for path simple');
      post.errors.simple.message.should.equal('Validator "must be abc" failed for path simple');

      post.set('simple', 'abc');
      post.save(function(err){
        should.strictEqual(err, null);
        db.close();
      });
    });
  },

  // GH-272
  'test validation with Model.schema.path introspection': function () {
    var db = start();
    var IntrospectionValidationSchema = new Schema({
      name: String
    });
    var IntrospectionValidation = db.model('IntrospectionValidation', IntrospectionValidationSchema, 'introspections_' + random());
    IntrospectionValidation.schema.path('name').validate(function (value) {
      return value.length < 2;
    }, 'Name cannot be greater than 1 character');
    var doc = new IntrospectionValidation({name: 'hi'});
    doc.save( function (err) {
      err.errors.name.message.should.equal("Validator \"Name cannot be greater than 1 character\" failed for path name");
      err.name.should.equal("ValidationError");
      err.message.should.equal("Validation failed");
      db.close();
    });
  },

  'test required validation for undefined values': function () {
    mongoose.model('TestUndefinedValidation', new Schema({
        simple: { type: String, required: true }
    }));

    var db = start()
      , TestUndefinedValidation = db.model('TestUndefinedValidation');

    var post = new TestUndefinedValidation();

    post.save(function(err){
      err.should.be.an.instanceof(MongooseError);
      err.should.be.an.instanceof(ValidationError);

      post.set('simple', 'here');
      post.save(function(err){
        should.strictEqual(err, null);
        db.close();
      });
    });
  },

  // GH-319
  'save callback should only execute once regardless of number of failed validations': function () {
    mongoose.model('CallbackFiresOnceValidation', new Schema({
        username: { type: String, validate: /^[a-z]{6}$/i }
      , email: { type: String, validate: /^[a-z]{6}$/i }
      , password: { type: String, validate: /^[a-z]{6}$/i }
    }));

    var db = start()
      , CallbackFiresOnceValidation = db.model('CallbackFiresOnceValidation');

    var post = new CallbackFiresOnceValidation({
        username: "nope"
      , email: "too"
      , password: "short"
    });

    var timesCalled = 0;

    post.save(function (err) {
      err.should.be.an.instanceof(MongooseError);
      err.should.be.an.instanceof(ValidationError);

      (++timesCalled).should.eql(1);

      (Object.keys(err.errors).length).should.eql(3);
      err.errors.password.should.be.an.instanceof(ValidatorError);
      err.errors.email.should.be.an.instanceof(ValidatorError);
      err.errors.username.should.be.an.instanceof(ValidatorError);
      err.errors.password.message.should.eql('Validator failed for path password');
      err.errors.email.message.should.eql('Validator failed for path email');
      err.errors.username.message.should.eql('Validator failed for path username');

      (Object.keys(post.errors).length).should.eql(3);
      post.errors.password.should.be.an.instanceof(ValidatorError);
      post.errors.email.should.be.an.instanceof(ValidatorError);
      post.errors.username.should.be.an.instanceof(ValidatorError);
      post.errors.password.message.should.eql('Validator failed for path password');
      post.errors.email.message.should.eql('Validator failed for path email');
      post.errors.username.message.should.eql('Validator failed for path username');

      db.close();
    });
  },

  'test validation on a query result': function () {
    mongoose.model('TestValidationOnResult', new Schema({
        resultv: { type: String, required: true }
    }));

    var db = start()
      , TestV = db.model('TestValidationOnResult');

    var post = new TestV;

    post.validate(function (err) {
      err.should.be.an.instanceof(MongooseError);
      err.should.be.an.instanceof(ValidationError);

      post.resultv = 'yeah';
      post.save(function (err) {
        should.strictEqual(err, null);
        TestV.findOne({ _id: post.id }, function (err, found) {
          should.strictEqual(err, null);
          found.resultv.should.eql('yeah');
          found.save(function(err){
            should.strictEqual(err, null);
            db.close();
          })
        });
      });
    })
  },

  'test required validation for previously existing null values': function () {
    mongoose.model('TestPreviousNullValidation', new Schema({
        previous: { type: String, required: true }
      , a: String
    }));

    var db = start()
      , TestP = db.model('TestPreviousNullValidation')

    TestP.collection.insert({ a: null, previous: null}, {}, function (err, f) {
      should.strictEqual(err, null);

      TestP.findOne({_id: f[0]._id}, function (err, found) {
        should.strictEqual(err, null);
        found.isNew.should.be.false;
        should.strictEqual(found.get('previous'), null);

        found.validate(function(err){
          err.should.be.an.instanceof(MongooseError);
          err.should.be.an.instanceof(ValidationError);

          found.set('previous', 'yoyo');
          found.save(function (err) {
            should.strictEqual(err, null);
            db.close();
          });
        })
      })
    });
  },

  'test nested validation': function(){
    mongoose.model('TestNestedValidation', new Schema({
        nested: {
            required: { type: String, required: true }
        }
    }));

    var db = start()
      , TestNestedValidation = db.model('TestNestedValidation');

    var post = new TestNestedValidation();
    post.set('nested.required', null);

    post.save(function(err){
      err.should.be.an.instanceof(MongooseError);
      err.should.be.an.instanceof(ValidationError);

      post.set('nested.required', 'here');
      post.save(function(err){
        should.strictEqual(err, null);
        db.close();
      });
    });
  },

  'test validation in subdocuments': function(){
    var Subdocs = new Schema({
        required: { type: String, required: true }
    });

    mongoose.model('TestSubdocumentsValidation', new Schema({
        items: [Subdocs]
    }));

    var db = start()
      , TestSubdocumentsValidation = db.model('TestSubdocumentsValidation');

    var post = new TestSubdocumentsValidation();

    post.get('items').push({ required: '' });

    post.save(function(err){
      err.should.be.an.instanceof(MongooseError);
      err.should.be.an.instanceof(ValidationError);
      err.errors.required.should.be.an.instanceof(ValidatorError);
      err.errors.required.message.should.eql('Validator "required" failed for path required');

      post.get('items')[0].set('required', true);
      post.save(function(err){
        should.strictEqual(err, null);
        db.close();
      });
    });
  },

  'test async validation': function(){
    var executed = false;

    function validator(v, fn){
      setTimeout(function () {
        executed = true;
        fn(v !== 'test');
      }, 50);
    };
    mongoose.model('TestAsyncValidation', new Schema({
        async: { type: String, validate: [validator, 'async validator'] }
    }));

    var db = start()
      , TestAsyncValidation = db.model('TestAsyncValidation');

    var post = new TestAsyncValidation();
    post.set('async', 'test');

    post.save(function(err){
      err.should.be.an.instanceof(MongooseError);
      err.should.be.an.instanceof(ValidationError);
      err.errors.async.should.be.an.instanceof(ValidatorError);
      err.errors.async.message.should.eql('Validator "async validator" failed for path async');
      executed.should.be.true;
      executed = false;

      post.set('async', 'woot');
      post.save(function(err){
        executed.should.be.true;
        should.strictEqual(err, null);
        db.close();
      });
    });
  },

  'test nested async validation': function(){
    var executed = false;

    function validator(v, fn){
      setTimeout(function () {
        executed = true;
        fn(v !== 'test');
      }, 50);
    };

    mongoose.model('TestNestedAsyncValidation', new Schema({
        nested: {
            async: { type: String, validate: [validator, 'async validator'] }
        }
    }));

    var db = start()
      , TestNestedAsyncValidation = db.model('TestNestedAsyncValidation');

    var post = new TestNestedAsyncValidation();
    post.set('nested.async', 'test');

    post.save(function(err){
      err.should.be.an.instanceof(MongooseError);
      err.should.be.an.instanceof(ValidationError);
      executed.should.be.true;
      executed = false;

      post.validate(function(err){
        err.should.be.an.instanceof(MongooseError);
        err.should.be.an.instanceof(ValidationError);
        executed.should.be.true;
        executed = false;

        post.set('nested.async', 'woot');
        post.validate(function(err){
          executed.should.be.true;
          should.equal(err, null);
          executed = false;

          post.save(function(err){
            executed.should.be.true;
            should.strictEqual(err, null);
            db.close();
          });
        });
      })

    });
  },

  'test async validation in subdocuments': function(){
    var executed = false;

    function validator (v, fn) {
      setTimeout(function(){
        executed = true;
        fn(v !== '');
      }, 50);
    };

    var Subdocs = new Schema({
        required: { type: String, validate: [validator, 'async in subdocs'] }
    });

    mongoose.model('TestSubdocumentsAsyncValidation', new Schema({
        items: [Subdocs]
    }));

    var db = start()
      , Test = db.model('TestSubdocumentsAsyncValidation');

    var post = new Test();

    post.get('items').push({ required: '' });

    post.save(function(err){
      err.should.be.an.instanceof(MongooseError);
      err.should.be.an.instanceof(ValidationError);
      executed.should.be.true;
      executed = false;

      post.get('items')[0].set({ required: 'here' });
      post.save(function(err){
        executed.should.be.true;
        should.strictEqual(err, null);
        db.close();
      });
    });
  },

  'test validation without saving': function(){

    mongoose.model('TestCallingValidation', new Schema({
      item: { type: String, required: true }
    }));

    var db = start()
      , TestCallingValidation = db.model('TestCallingValidation');

    var post = new TestCallingValidation;

    post.schema.path('item').isRequired.should.be.true;

    should.strictEqual(post.isNew, true);

    post.validate(function(err){
      err.should.be.an.instanceof(MongooseError);
      err.should.be.an.instanceof(ValidationError);
      should.strictEqual(post.isNew, true);

      post.item = 'yo';
      post.validate(function(err){
        should.equal(err, null);
        should.strictEqual(post.isNew, true);
        db.close();
      });
    });

  },

  'test setting required to false': function () {
    function validator () {
      return true;
    }

    mongoose.model('TestRequiredFalse', new Schema({
      result: { type: String, validate: [validator, 'chump validator'], required: false }
    }));

    var db = start()
      , TestV = db.model('TestRequiredFalse');

    var post = new TestV;

    post.schema.path('result').isRequired.should.be.false;

    db.close();
  },

  'test defaults application': function(){
    var now = Date.now();

    mongoose.model('TestDefaults', new Schema({
        date: { type: Date, default: now }
    }));

    var db = start()
      , TestDefaults = db.model('TestDefaults');

    var post = new TestDefaults();
    post.get('date').should.be.an.instanceof(Date);
    (+post.get('date')).should.eql(now);
    db.close();
  },

  'test "type" is allowed as a key': function(){
    mongoose.model('TestTypeDefaults', new Schema({
        type: { type: String, default: 'YES!' }
    }));

    var db = start()
      , TestDefaults = db.model('TestTypeDefaults');

    var post = new TestDefaults();
    post.get('type').should.be.a('string');
    post.get('type').should.eql('YES!');

    // GH-402
    var TestDefaults2 = db.model('TestTypeDefaults2', new Schema({
        x: { y: { type: { type: String }, owner: String } }
    }));

    var post = new TestDefaults2;
    post.x.y.type = "#402";
    post.x.y.owner= "me";
    post.save(function (err) {
      db.close();
      should.strictEqual(null, err);
    });

  },

  'test nested defaults application': function(){
    var now = Date.now();

    mongoose.model('TestNestedDefaults', new Schema({
        nested: {
            date: { type: Date, default: now }
        }
    }));

    var db = start()
      , TestDefaults = db.model('TestNestedDefaults');

    var post = new TestDefaults();
    post.get('nested.date').should.be.an.instanceof(Date);
    (+post.get('nested.date')).should.eql(now);
    db.close();
  },
  
  'test defaults application in subdocuments': function(){
    var now = Date.now();

    var Items = new Schema({
        date: { type: Date, default: now }
    });

    mongoose.model('TestSubdocumentsDefaults', new Schema({
        items: [Items]
    }));

    var db = start()
      , TestSubdocumentsDefaults = db.model('TestSubdocumentsDefaults');

    var post = new TestSubdocumentsDefaults();
    post.get('items').push({});
    post.get('items')[0].get('date').should.be.an.instanceof(Date);
    (+post.get('items')[0].get('date')).should.eql(now);
    db.close();
  },

  // TODO: adapt this text to handle a getIndexes callback that's not unique to
  // the mongodb-native driver.
  'test that indexes are ensured when the model is compiled': function(){
    var Indexed = new Schema({
        name  : { type: String, index: true }
      , last  : String
      , email : String
    });

    Indexed.index({ last: 1, email: 1 }, { unique: true });

    var db = start()
      , IndexedModel = db.model('IndexedModel', Indexed, 'indexedmodel' + random())
      , assertions = 0;

    IndexedModel.on('index', function(){
      IndexedModel.collection.getIndexes(function(err, indexes){
        should.strictEqual(err, null);

        for (var i in indexes)
          indexes[i].forEach(function(index){
            if (index[0] == 'name')
              assertions++;
            if (index[0] == 'last')
              assertions++;
            if (index[0] == 'email')
              assertions++;
          });

        assertions.should.eql(3);
        db.close();
      });
    });
  },

  'test indexes on embedded documents': function () {
    var BlogPosts = new Schema({
        _id     : { type: ObjectId, index: true }
      , title   : { type: String, index: true }
      , desc    : String
    });

    var User = new Schema({
        name        : { type: String, index: true }
      , blogposts   : [BlogPosts]
    });

    var db = start()
      , UserModel = db.model('DeepIndexedModel', User, 'deepindexedmodel' + random())
      , assertions = 0;

    UserModel.on('index', function () {
      UserModel.collection.getIndexes(function (err, indexes) {
        should.strictEqual(err, null);

        for (var i in indexes)
          indexes[i].forEach(function(index){
            if (index[0] == 'name')
              assertions++;
            if (index[0] == 'blogposts._id')
              assertions++;
            if (index[0] == 'blogposts.title')
              assertions++;
          });

        assertions.should.eql(3);
        db.close();
      });
    });
  },

  'compound indexes on embedded documents should be created': function () {
    var BlogPosts = new Schema({
        title   : String
      , desc    : String
    });

    BlogPosts.index({ title: 1, desc: 1 });

    var User = new Schema({
        name        : { type: String, index: true }
      , blogposts   : [BlogPosts]
    });

    var db = start()
      , UserModel = db.model('DeepCompoundIndexModel', User, 'deepcompoundindexmodel' + random())
      , found = 0;

    UserModel.on('index', function () {
      UserModel.collection.getIndexes(function (err, indexes) {
        should.strictEqual(err, null);

        for (var index in indexes) {
          switch (index) {
            case 'name_1':
            case 'blogposts.title_1_blogposts.desc_1':
              ++found;
              break;
          }
        }

        db.close();
        found.should.eql(2);
      });
    });
  },

  'test getters with same name on embedded documents not clashing': function() {
    var Post = new Schema({
        title   : String
      , author  : { name : String }
      , subject : { name : String }
    });

    mongoose.model('PostWithClashGetters', Post);

    var db = start()
      , PostModel = db.model('PostWithClashGetters', 'postwithclash' + random());

    var post = new PostModel({
        title: 'Test'
      , author: { name: 'A' }
      , subject: { name: 'B' }
    });

    post.author.name.should.eql('A');
    post.subject.name.should.eql('B');
    post.author.name.should.eql('A');

    db.close();
  },

  'test post save middleware': function () {
    var schema = new Schema({
        title: String
    });

    var called = 0;

    schema.post('save', function (obj) {
      obj.title.should.eql('Little Green Running Hood');
      called.should.equal(0);
      called++;
    });

    schema.post('save', function (obj) {
      obj.title.should.eql('Little Green Running Hood');
      called.should.equal(1);
      called++;
    });

    schema.post('save', function (obj) {
      obj.title.should.eql('Little Green Running Hood');
      called.should.equal(2);
      db.close();
    });

    var db = start()
      , TestMiddleware = db.model('TestPostSaveMiddleware', schema);

    var test = new TestMiddleware({ title: 'Little Green Running Hood'});

    test.save(function(err){
      should.strictEqual(err, null);
    });
  },

  'test middleware': function () {
    var schema = new Schema({
        title: String
    });

    var called = 0;

    schema.pre('init', function (next) {
      called++;
      next();
    });

    schema.pre('save', function (next) {
      called++;
      next(new Error('Error 101'));
    });

    schema.pre('remove', function (next) {
      called++;
      next();
    });

    mongoose.model('TestMiddleware', schema);

    var db = start()
      , TestMiddleware = db.model('TestMiddleware');

    var test = new TestMiddleware();

    test.init({
        title: 'Test'
    });
   
    called.should.eql(1);

    test.save(function(err){
      err.should.be.an.instanceof(Error);
      err.message.should.eql('Error 101');
      called.should.eql(2);

      test.remove(function(err){
        should.strictEqual(err, null);
        called.should.eql(3);
        db.close();
      });
    });
  },

  'test post init middleware': function () {
    var schema = new Schema({
        title: String
    });

    var preinit = 0
      , postinit = 0

    schema.pre('init', function (next) {
      ++preinit;
      next();
    });

    schema.post('init', function () {
      ++postinit;
    });

    mongoose.model('TestPostInitMiddleware', schema);

    var db = start()
      , Test = db.model('TestPostInitMiddleware');

    var test = new Test({ title: "banana" });

    test.save(function(err){
      should.strictEqual(err, null);

      Test.findById(test._id, function (err, test) {
        should.strictEqual(err, null);
        preinit.should.eql(1);
        postinit.should.eql(1);
        test.remove(function(err){
          db.close();
        });
      });
    });
  },

  'test updating documents': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection)
      , title = 'Tobi ' + random()
      , author = 'Brian ' + random()
      , newTitle = 'Woot ' + random()
      , id0 = new DocumentObjectId
      , id1 = new DocumentObjectId

    var post = new BlogPost();
    post.set('title', title);
    post.author = author;
    post.meta.visitors = 0;
    post.date = new Date;
    post.published = true;
    post.mixed = { x: 'ex' };
    post.numbers = [4,5,6,7];
    post.owners = [id0, id1];
    post.comments = [{ body: 'been there' }, { body: 'done that' }];

    post.save(function (err) {
      should.strictEqual(err, null);
      BlogPost.findById(post._id, function (err, cf) {
        should.strictEqual(err, null);
        cf.title.should.equal(title);
        cf.author.should.equal(author);
        cf.meta.visitors.valueOf().should.eql(0);
        cf.date.should.eql(post.date);
        cf.published.should.be.true;
        cf.mixed.x.should.equal('ex');
        cf.numbers.toObject().should.eql([4,5,6,7]);
        cf.owners.length.should.equal(2);
        cf.owners[0].toString().should.equal(id0.toString());
        cf.owners[1].toString().should.equal(id1.toString());
        cf.comments.length.should.equal(2);
        cf.comments[0].body.should.eql('been there');
        cf.comments[1].body.should.eql('done that');

        var update = {
            title: newTitle // becomes $set
          , $inc: { 'meta.visitors': 2 }
          , $set: { date: new Date }
          , published: false // becomes $set
          , 'mixed': { x: 'ECKS', y: 'why' } // $set
          , $pullAll: { 'numbers': [4, 6] }
          , $pull: { 'owners': id0 }
          , 'comments.1.body': 8
        }

        BlogPost.update({ title: title }, update, function (err) {
          should.strictEqual(err, null);

          BlogPost.findById(post._id, function (err, up) {
            should.strictEqual(err, null);
            up.title.should.equal(newTitle);
            up.author.should.equal(author);
            up.meta.visitors.valueOf().should.equal(2);
            up.date.toString().should.equal(update.$set.date.toString());
            up.published.should.eql(false);
            up.mixed.x.should.equal('ECKS');
            up.mixed.y.should.equal('why');
            up.numbers.toObject().should.eql([5,7]);
            up.owners.length.should.equal(1);
            up.owners[0].toString().should.eql(id1.toString());
            up.comments[0].body.should.equal('been there');
            up.comments[1].body.should.equal('8');

            var update2 = {
                'comments.body': 'fail'
            }

            BlogPost.update({ _id: post._id }, update2, function (err) {
              should.strictEqual(!!err, true);
              ;/^can't append to array using string field name \[body\]/.test(err.message).should.be.true;

              var update3 = {
                  $pull: 'fail'
              }

              BlogPost.update({ _id: post._id }, update3, function (err) {
                should.strictEqual(!!err, true);
                ;/Invalid atomic update value/.test(err.message).should.be.true;

                var update4 = {
                    $inc: { idontexist: 1 }
                }

                // should not overwrite doc when no valid paths are submitted
                BlogPost.update({ _id: post._id }, update4, function (err) {
                  should.strictEqual(err, null);

                  BlogPost.findById(post._id, function (err, up) {
                    should.strictEqual(err, null);

                    up.title.should.equal(newTitle);
                    up.author.should.equal(author);
                    up.meta.visitors.valueOf().should.equal(2);
                    up.date.toString().should.equal(update.$set.date.toString());
                    up.published.should.eql(false);
                    up.mixed.x.should.equal('ECKS');
                    up.mixed.y.should.equal('why');
                    up.numbers.toObject().should.eql([5,7]);
                    up.owners.length.should.equal(1);
                    up.owners[0].toString().should.eql(id1.toString());
                    up.comments[0].body.should.equal('been there');
                    up.comments[1].body.should.equal('8');

                    var update5 = {
                        comments: [{ body: 'worked great' }]
                      , $set: {'numbers.1': 100}
                      , $inc: { idontexist: 1 }
                    }

                    BlogPost.update({ _id: post._id }, update5, function (err) {
                      should.strictEqual(err, null);

                      // get the underlying doc
                      BlogPost.collection.findOne({ _id: post._id }, function (err, doc) {
                        db.close();
                        should.strictEqual(err, null);

                        var up = new BlogPost;
                        up.init(doc);
                        up.comments.length.should.equal(1);
                        up.comments[0].body.should.equal('worked great');
                        up.meta.visitors.valueOf().should.equal(2);
                        up.mixed.x.should.equal('ECKS');
                        up.numbers.toObject().should.eql([5,100]);
                        up.numbers[1].valueOf().should.eql(100);

                        should.strictEqual(undefined, doc.idontexist);
                        doc.numbers[1].should.eql(100);
                      });
                    });
                  });
                });
              });
            });
          });
        });
      });
    });
  },

  'test update doc casting': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    var post = new BlogPost();
    post.set('title', '1');

    var id = post.get('_id');

    post.save(function (err) {
      should.strictEqual(err, null);

      BlogPost.update({ title: 1, _id: id }, { title: 2 }, function (err) {
        should.strictEqual(err, null);

        BlogPost.findOne({ _id: post.get('_id') }, function (err, doc) {
          should.strictEqual(err, null);

          doc.get('title').should.eql('2');
          db.close();
        });
      });
    });
  },

  'test $push casting': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection)
      , post = new BlogPost();

    post.get('numbers').push('3');
    post.get('numbers')[0].should.equal(3);
    db.close();
  },

  'test $pull casting': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection)
      , post = new BlogPost();

    post.get('numbers').push(1, 2, 3, 4);
    post.save( function (err) {
      BlogPost.findById( post.get('_id'), function (err, found) {
        found.get('numbers').length.should.equal(4);
        found.get('numbers').$pull('3');
        found.save( function (err) {
          BlogPost.findById( found.get('_id'), function (err, found2) {
            found2.get('numbers').length.should.equal(3);
            db.close();
          });
        });
      });
    });
  },

  'test updating numbers atomically': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection)
      , totalDocs = 4
      , saveQueue = [];

    var post = new BlogPost();
    post.set('meta.visitors', 5);

    post.save(function(err){
      if (err) throw err;

      BlogPost.findOne({ _id: post.get('_id') }, function(err, doc){
        if (err) throw err;
        doc.get('meta.visitors').increment();
        doc.get('meta.visitors').valueOf().should.be.equal(6);
        save(doc);
      });

      BlogPost.findOne({ _id: post.get('_id') }, function(err, doc){
        if (err) throw err;
        doc.get('meta.visitors').increment();
        doc.get('meta.visitors').valueOf().should.be.equal(6);
        save(doc);
      });

      BlogPost.findOne({ _id: post.get('_id') }, function(err, doc){
        if (err) throw err;
        doc.get('meta.visitors').increment();
        doc.get('meta.visitors').valueOf().should.be.equal(6);
        save(doc);
      });

      BlogPost.findOne({ _id: post.get('_id') }, function(err, doc){
        if (err) throw err;
        doc.get('meta.visitors').increment();
        doc.get('meta.visitors').valueOf().should.be.equal(6);
        save(doc);
      });

      function save(doc) {
        saveQueue.push(doc);
        if (saveQueue.length == 4)
          saveQueue.forEach(function (doc) {
            doc.save(function (err) {
              if (err) throw err;
              --totalDocs || complete();
            });
          });
      };

      function complete () {
        BlogPost.findOne({ _id: post.get('_id') }, function (err, doc) {
          if (err) throw err;
          doc.get('meta.visitors').valueOf().should.be.equal(9);
          db.close();
        });
      };
    });
  },

  'test incrementing a number atomically with an arbitrary value': function () {
    var db = start()
      , BlogPost = db.model('BlogPost');

    var post = new BlogPost();

    post.meta.visitors = 0;

    post.save(function (err) {
      should.strictEqual(err, null);

      post.meta.visitors.increment(50);

      post.save(function (err) {
        should.strictEqual(err, null);

        BlogPost.findById(post._id, function (err, doc) {
          should.strictEqual(err, null);

          (+doc.meta.visitors).should.eql(50);
          db.close();
        });
      });
    });
  },

  // GH-203
  'test changing a number non-atomically': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    var post = new BlogPost();

    post.meta.visitors = 5;

    post.save(function (err) {
      should.strictEqual(err, null);

      BlogPost.findById(post._id, function (err, doc) {
        should.strictEqual(err, null);

        doc.meta.visitors -= 2;
        
        doc.save(function (err) {
          should.strictEqual(err, null);

          BlogPost.findById(post._id, function (err, doc) {
            should.strictEqual(err, null);
  
            (+doc.meta.visitors).should.eql(3);
            db.close();
          });
        });
      });
    });
  },

  'test saving subdocuments atomically': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection)
      , totalDocs = 4
      , saveQueue = [];
    
    var post = new BlogPost();

    post.save(function(err){
      if (err) throw err;

      BlogPost.findOne({ _id: post.get('_id') }, function(err, doc){
        if (err) throw err;
        doc.get('comments').push({ title: '1' });
        save(doc);
      });

      BlogPost.findOne({ _id: post.get('_id') }, function(err, doc){
        if (err) throw err;
        doc.get('comments').push({ title: '2' });
        save(doc);
      });

      BlogPost.findOne({ _id: post.get('_id') }, function(err, doc){
        if (err) throw err;
        doc.get('comments').push({ title: '3' });
        save(doc);
      });

      BlogPost.findOne({ _id: post.get('_id') }, function(err, doc){
        if (err) throw err;
        doc.get('comments').push({ title: '4' }, { title: '5' });
        save(doc);
      });

      function save(doc) {
        saveQueue.push(doc);
        if (saveQueue.length == 4)
          saveQueue.forEach(function (doc) {
            doc.save(function (err) {
              if (err) throw err;
              --totalDocs || complete();
            });
          });
      };

      function complete () {
        BlogPost.findOne({ _id: post.get('_id') }, function (err, doc) {
          if (err) throw err;

          doc.get('comments').length.should.eql(5);

          doc.get('comments').some(function(comment){
            return comment.get('title') == '1';
          }).should.be.true;

          doc.get('comments').some(function(comment){
            return comment.get('title') == '2';
          }).should.be.true;

          doc.get('comments').some(function(comment){
            return comment.get('title') == '3';
          }).should.be.true;

          doc.get('comments').some(function(comment){
            return comment.get('title') == '4';
          }).should.be.true;

          doc.get('comments').some(function(comment){
            return comment.get('title') == '5';
          }).should.be.true;

          db.close();
        });
      };
    });
  },

  // GH-310
  'test setting a subdocument atomically': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection)

    BlogPost.create({
      comments: [{ title: 'first-title', body: 'first-body'}]
    }, function (err, blog) {
      should.strictEqual(null, err);
      BlogPost.findById(blog.id, function (err, agent1blog) {
        should.strictEqual(null, err);
        BlogPost.findById(blog.id, function (err, agent2blog) {
          should.strictEqual(null, err);
          agent1blog.get('comments')[0].title = 'second-title';
          agent1blog.save( function (err) {
            should.strictEqual(null, err);
            agent2blog.get('comments')[0].body = 'second-body';
            agent2blog.save( function (err) {
              should.strictEqual(null, err);
              BlogPost.findById(blog.id, function (err, foundBlog) {
                should.strictEqual(null, err);
                db.close();
                var comment = foundBlog.get('comments')[0];
                comment.title.should.eql('second-title');
                comment.body.should.eql('second-body');
              });
            });
          });
        });
      });
    });
  },

  'test doubly nested array saving and loading': function(){
    var Inner = new Schema({
        arr: [Number]
    });

    var Outer = new Schema({
        inner: [Inner]
    });
    mongoose.model('Outer', Outer);

    var db = start();
    var Outer = db.model('Outer', 'arr_test_' + random());

    var outer = new Outer();
    outer.inner.push({});
    outer.save(function(err) {
      should.strictEqual(err, null);
      outer.get('_id').should.be.an.instanceof(DocumentObjectId);

      Outer.findById(outer.get('_id'), function(err, found) {
        should.strictEqual(err, null);
        should.equal(1, found.inner.length);
        found.inner[0].arr.push(5);
        found.save(function(err) {
          should.strictEqual(err, null);
          found.get('_id').should.be.an.instanceof(DocumentObjectId);
          Outer.findById(found.get('_id'), function(err, found2) {
            db.close();
            should.strictEqual(err, null);
            should.equal(1, found2.inner.length);
            should.equal(1, found2.inner[0].arr.length);
            should.equal(5, found2.inner[0].arr[0]);
          });
        });
      });
    });
  },

  'test updating multiple Number $pushes as a single $pushAll': function () {
    var db = start()
      , schema = new Schema({
          nested: {
            nums: [Number]
          }
        });

    mongoose.model('NestedPushes', schema);
    var Temp = db.model('NestedPushes', collection);

    Temp.create({}, function (err, t) {
      t.nested.nums.push(1);
      t.nested.nums.push(2);

      t.nested.nums.should.have.length(2);

      t.save( function (err) {
        should.strictEqual(null, err);
        t.nested.nums.should.have.length(2);
        Temp.findById(t._id, function (err, found) {
          found.nested.nums.should.have.length(2);
          db.close();
        });
      });
    });
  },

  'test updating at least a single $push and $pushAll as a single $pushAll': function () {
    var db = start()
      , schema = new Schema({
          nested: {
            nums: [Number]
          }
        });

    mongoose.model('NestedPushes', schema);
    var Temp = db.model('NestedPushes', collection);

    Temp.create({}, function (err, t) {
      t.nested.nums.push(1);
      t.nested.nums.$pushAll([2, 3]);

      t.nested.nums.should.have.length(3);

      t.save( function (err) {
        should.strictEqual(null, err);
        t.nested.nums.should.have.length(3);
        Temp.findById(t._id, function (err, found) {
          found.nested.nums.should.have.length(3);
          db.close();
        });
      });
    });
  },

  'test activePaths should be updated for nested modifieds': function () {
    var db = start()
      , schema = new Schema({
          nested: {
            nums: [Number]
          }
        });

    mongoose.model('NestedPushes', schema);
    var Temp = db.model('NestedPushes', collection);

    Temp.create({nested: {nums: [1, 2, 3, 4, 5]}}, function (err, t) {
      t.nested.nums.$pull(1);
      t.nested.nums.$pull(2);

      t._activePaths.stateOf('nested.nums').should.equal('modify');
      db.close();

    });
  },

  '$pull should affect what you see in an array before a save': function () {
    var db = start()
      , schema = new Schema({
          nested: {
            nums: [Number]
          }
        });

    mongoose.model('NestedPushes', schema);
    var Temp = db.model('NestedPushes', collection);

    Temp.create({nested: {nums: [1, 2, 3, 4, 5]}}, function (err, t) {
      t.nested.nums.$pull(1);

      t.nested.nums.should.have.length(4);

      db.close();
    });
  },

  '$pullAll should affect what you see in an array before a save': function () {
    var db = start()
      , schema = new Schema({
          nested: {
            nums: [Number]
          }
        });

    mongoose.model('NestedPushes', schema);
    var Temp = db.model('NestedPushes', collection);

    Temp.create({nested: {nums: [1, 2, 3, 4, 5]}}, function (err, t) {
      t.nested.nums.$pullAll([1, 2, 3]);

      t.nested.nums.should.have.length(2);

      db.close();
    });
  },

  'test updating multiple Number $pulls as a single $pullAll': function () {
    var db = start()
      , schema = new Schema({
          nested: {
            nums: [Number]
          }
        });

    mongoose.model('NestedPushes', schema);
    var Temp = db.model('NestedPushes', collection);

    Temp.create({nested: {nums: [1, 2, 3, 4, 5]}}, function (err, t) {
      t.nested.nums.$pull(1);
      t.nested.nums.$pull(2);

      t.nested.nums.should.have.length(3);

      t.save( function (err) {
        should.strictEqual(null, err);
        t.nested.nums.should.have.length(3);
        Temp.findById(t._id, function (err, found) {
          found.nested.nums.should.have.length(3);
          db.close();
        });
      });
    });
  },

  'having both a pull and pullAll should default to pullAll': function () {
    var db = start()
      , schema = new Schema({
          nested: {
            nums: [Number]
          }
        });

    mongoose.model('NestedPushes', schema);
    var Temp = db.model('NestedPushes', collection);

    Temp.create({nested: {nums: [1, 2, 3, 4, 5]}}, function (err, t) {
      t.nested.nums.$pull(1);
      t.nested.nums.$pullAll([2, 3]);

      t.nested.nums.should.have.length(2);

      t.save( function (err) {
        should.strictEqual(null, err);
        t.nested.nums.should.have.length(2);
        Temp.findById(t._id, function (err, found) {
          found.nested.nums.should.have.length(2);
          db.close();
        });
      });
    });
  },

  '$shift': function () {
    var db = start()
      , schema = new Schema({
          nested: {
            nums: [Number]
          }
        });

    mongoose.model('TestingShift', schema);
    var Temp = db.model('TestingShift', collection);

    Temp.create({ nested: { nums: [1,2,3] }}, function (err, t) {
      should.strictEqual(null, err);

      Temp.findById(t._id, function (err, found) {
        should.strictEqual(null, err);
        found.nested.nums.should.have.length(3);
        found.nested.nums.$pop();
        found.nested.nums.should.have.length(2);
        found.nested.nums[0].should.eql(1);
        found.nested.nums[1].should.eql(2);

        found.save(function (err) {
          should.strictEqual(null, err);
          Temp.findById(t._id, function (err, found) {
            should.strictEqual(null, err);
            found.nested.nums.should.have.length(2);
            found.nested.nums[0].should.eql(1);
            found.nested.nums[1].should.eql(2);
            found.nested.nums.$shift();
            found.nested.nums.should.have.length(1);
            found.nested.nums[0].should.eql(2);

            found.save(function (err) {
              should.strictEqual(null, err);
              Temp.findById(t._id, function (err, found) {
                db.close();
                should.strictEqual(null, err);
                found.nested.nums.should.have.length(1);
                found.nested.nums[0].should.eql(2);
              });
            });
          });
        });
      });
    });
  },

  'test saving embedded arrays of Numbers atomically': function () {
    var db = start()
      , TempSchema = new Schema({
          nums: [Number]
        })
      , totalDocs = 2
      , saveQueue = [];

    mongoose.model('Temp', TempSchema);
    var Temp = db.model('Temp', collection);
    
    var t = new Temp();

    t.save(function(err){
      if (err) throw err;

      Temp.findOne({ _id: t.get('_id') }, function(err, doc){
        if (err) throw err;
        doc.get('nums').push(1);
        save(doc);
      });

      Temp.findOne({ _id: t.get('_id') }, function(err, doc){
        if (err) throw err;
        doc.get('nums').push(2, 3);
        save(doc);
      });


      function save(doc) {
        saveQueue.push(doc);
        if (saveQueue.length == totalDocs)
          saveQueue.forEach(function (doc) {
            doc.save(function (err) {
              if (err) throw err;
              --totalDocs || complete();
            });
          });
      };

      function complete () {
        Temp.findOne({ _id: t.get('_id') }, function (err, doc) {
          if (err) throw err;

          doc.get('nums').length.should.eql(3);

          doc.get('nums').some(function(num){
            return num.valueOf() == '1';
          }).should.be.true;

          doc.get('nums').some(function(num){
            return num.valueOf() == '2';
          }).should.be.true;

          doc.get('nums').some(function(num){
            return num.valueOf() == '3';
          }).should.be.true;


          db.close();
        });
      };
    });
  },

  'test saving embedded arrays of Strings atomically': function () {
    var db = start()
      , StrListSchema = new Schema({
          strings: [String]
        })
      , totalDocs = 2
      , saveQueue = [];

    mongoose.model('StrList', StrListSchema);
    var StrList = db.model('StrList');
    
    var t = new StrList();

    t.save(function(err){
      if (err) throw err;

      StrList.findOne({ _id: t.get('_id') }, function(err, doc){
        if (err) throw err;
        doc.get('strings').push('a');
        save(doc);
      });

      StrList.findOne({ _id: t.get('_id') }, function(err, doc){
        if (err) throw err;
        doc.get('strings').push('b', 'c');
        save(doc);
      });


      function save(doc) {
        saveQueue.push(doc);
        if (saveQueue.length == totalDocs)
          saveQueue.forEach(function (doc) {
            doc.save(function (err) {
              if (err) throw err;
              --totalDocs || complete();
            });
          });
      };

      function complete () {
        StrList.findOne({ _id: t.get('_id') }, function (err, doc) {
          if (err) throw err;

          doc.get('strings').length.should.eql(3);

          doc.get('strings').some(function(str){
            return str == 'a';
          }).should.be.true;

          doc.get('strings').some(function(str){
            return str == 'b';
          }).should.be.true;

          doc.get('strings').some(function(str){
            return str == 'c';
          }).should.be.true;

          db.close();
        });
      };
    });
  },

  'test saving embedded arrays of Buffers atomically': function () {
    var db = start()
      , BufListSchema = new Schema({
          buffers: [Buffer]
        })
      , totalDocs = 2
      , saveQueue = [];

    mongoose.model('BufList', BufListSchema);
    var BufList = db.model('BufList');

    var t = new BufList();

    t.save(function(err){
      should.strictEqual(null, err);

      BufList.findOne({ _id: t.get('_id') }, function(err, doc){
        should.strictEqual(null, err);
        doc.get('buffers').push(new Buffer([140]));
        save(doc);
      });

      BufList.findOne({ _id: t.get('_id') }, function(err, doc){
        should.strictEqual(null, err);
        doc.get('buffers').push(new Buffer([141]), new Buffer([142]));
        save(doc);
      });


      function save(doc) {
        saveQueue.push(doc);
        if (saveQueue.length == totalDocs)
          saveQueue.forEach(function (doc) {
            doc.save(function (err) {
              should.strictEqual(null, err);
              --totalDocs || complete();
            });
          });
      };

      function complete () {
        BufList.findOne({ _id: t.get('_id') }, function (err, doc) {
          db.close();
          should.strictEqual(null, err);

          doc.get('buffers').length.should.eql(3);

          doc.get('buffers').some(function(buf){
            return buf[0] == 140;
          }).should.be.true;

          doc.get('buffers').some(function(buf){
            return buf[0] == 141;
          }).should.be.true;

          doc.get('buffers').some(function(buf){
            return buf[0] == 142;
          }).should.be.true;

        });
      };
    });
  },

  // GH-255
  'test updating an embedded document in an embedded array': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    BlogPost.create({comments: [{title: 'woot'}]}, function (err, post) {
      should.strictEqual(err, null);
      BlogPost.findById(post._id, function (err, found) {
        should.strictEqual(err, null);
        found.comments[0].title.should.equal('woot');
        found.comments[0].title = 'notwoot';
        found.save( function (err) {
          should.strictEqual(err, null);
          BlogPost.findById(found._id, function (err, updated) {
            db.close();
            should.strictEqual(err, null);
            updated.comments[0].title.should.equal('notwoot');
          });
        });
      });
    });
  },

  // GH-334
  'test updating an embedded array document to an Object value': function () {
    var db = start()
      , SubSchema = new Schema({ 
          name : String , 
          subObj : { subName : String } 
        });
    var GH334Schema = new Schema ({ name : String , arrData : [ SubSchema] });

    mongoose.model('GH334' , GH334Schema);
    var AModel = db.model('GH334');
    var instance = new AModel();

    instance.set( { name : 'name-value' , arrData : [ { name : 'arrName1' , subObj : { subName : 'subName1' } } ] });
    instance.save(function(err)  {
        AModel.findById(instance.id, function(err, doc)  {
          doc.arrData[0].set('subObj' , { subName : 'modified subName' });
          doc.save(function(err)  {
            should.strictEqual(null, err);
            AModel.findById(instance.id, function (err, doc) {
              db.close();
              should.strictEqual(null, err);
              doc.arrData[0].subObj.subName.should.eql('modified subName');
            });
          });
       });
    });
  },

  // GH-267
  'saving an embedded document twice should not push that doc onto the parent doc twice': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection)
      , post = new BlogPost();

    post.comments.push({title: 'woot'});
    post.save( function (err) {
      should.strictEqual(err, null);
      post.comments.should.have.length(1);
      BlogPost.findById(post.id, function (err, found) {
        should.strictEqual(err, null);
        found.comments.should.have.length(1);
        post.save( function (err) {
          should.strictEqual(err, null);
          post.comments.should.have.length(1);
          BlogPost.findById(post.id, function (err, found) {
            db.close();
            should.strictEqual(err, null);
            found.comments.should.have.length(1);
          });
        });
      });
    });
  },

  'test filtering an embedded array by the id shortcut function': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    var post = new BlogPost();

    post.comments.push({ title: 'woot' });
    post.comments.push({ title: 'aaaa' });

    var subdoc1 = post.comments[0];
    var subdoc2 = post.comments[1];

    post.save(function (err) {
      should.strictEqual(err, null);

      BlogPost.findById(post.get('_id'), function (err, doc) {
        should.strictEqual(err, null);

        // test with an objectid
        doc.comments.id(subdoc1.get('_id')).title.should.eql('woot');

        // test with a string
        var id = DocumentObjectId.toString(subdoc2._id);
        doc.comments.id(id).title.should.eql('aaaa');

        db.close();
      });
    });
  },

  'test filtering an embedded array by the id with cast error': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    var post = new BlogPost();

    post.save(function (err) {
      should.strictEqual(err, null);

      BlogPost.findById(post.get('_id'), function (err, doc) {
        should.strictEqual(err, null);
        should.strictEqual(doc.comments.id(null), null);

        db.close();
      });
    });
  },

  'test filtering an embedded array by the id shortcut with no match': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    var post = new BlogPost();

    post.save(function (err) {
      should.strictEqual(err, null);

      BlogPost.findById(post.get('_id'), function (err, doc) {
        should.strictEqual(err, null);
        should.strictEqual(doc.comments.id(new DocumentObjectId), null);

        db.close();
      });
    });
  },

  'test for removing a subdocument atomically': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    var post = new BlogPost();
    post.title = 'hahaha';
    post.comments.push({ title: 'woot' });
    post.comments.push({ title: 'aaaa' });

    post.save(function (err) {
      should.strictEqual(err, null);

      BlogPost.findById(post.get('_id'), function (err, doc) {
        should.strictEqual(err, null);

        doc.comments[0].remove();
        doc.save(function (err) {
          should.strictEqual(err, null);

          BlogPost.findById(post.get('_id'), function (err, doc) {
            should.strictEqual(err, null);

            doc.comments.should.have.length(1);
            doc.comments[0].title.should.eql('aaaa');

            db.close();
          });
        });
      });
    });
  },

  'try saving mixed data': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection)
      , count = 3;

    // string
    var post = new BlogPost();
    post.mixed = 'woot';
    post.save(function (err) {
      should.strictEqual(err, null);

      BlogPost.findById(post._id, function (err) {
        should.strictEqual(err, null);

        --count || db.close();
      });
    });
    
    // array
    var post2 = new BlogPost();
    post2.mixed = { name: "mr bungle", arr: [] };
    post2.save(function (err) {
      should.strictEqual(err, null);

      BlogPost.findById(post2._id, function (err, doc){
        should.strictEqual(err, null);

        Array.isArray(doc.mixed.arr).should.be.true;

        doc.mixed = [{foo: 'bar'}];
        doc.save(function (err) {
          should.strictEqual(err, null);

          BlogPost.findById(doc._id, function (err, doc){
            should.strictEqual(err, null);

            Array.isArray(doc.mixed).should.be.true;
            doc.mixed.push({ hello: 'world' });
            doc.mixed.push([ 'foo', 'bar' ]);
            doc.commit('mixed');

            doc.save(function (err, doc) {
              should.strictEqual(err, null);

              BlogPost.findById(post2._id, function (err, doc) {
                should.strictEqual(err, null);

                doc.mixed[0].should.eql({ foo: 'bar' });
                doc.mixed[1].should.eql({ hello: 'world' });
                doc.mixed[2].should.eql(['foo','bar']);
                --count || db.close();
              });
            });
          });

          // date
          var post3 = new BlogPost();
          post3.mixed = new Date;
          post3.save(function (err) {
            should.strictEqual(err, null);

            BlogPost.findById(post3._id, function (err, doc) {
              should.strictEqual(err, null);

              doc.mixed.should.be.an.instanceof(Date);
              --count || db.close();
            });
          });
        });

      });
    });

  },

  // GH-200
  'try populating mixed data from the constructor': function () {
    var db = start()
      , BlogPost = db.model('BlogPost');

    var post = new BlogPost({
      mixed: {
          type: 'test'
        , github: 'rules'
        , nested: {
              number: 3
          }
      }
    });

    post.mixed.type.should.eql('test');
    post.mixed.github.should.eql('rules');
    post.mixed.nested.number.should.eql(3);

    db.close();
  },

  'test that we instantiate MongooseNumber in arrays': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    var post = new BlogPost();
    post.numbers.push(1, '2', 3);

    post.save(function (err) {
      should.strictEqual(err, null);

      BlogPost.findById(post._id, function (err, doc) {
        should.strictEqual(err, null);

        (~doc.numbers.indexOf(1)).should.not.eql(0);
        (~doc.numbers.indexOf(2)).should.not.eql(0);
        (~doc.numbers.indexOf(3)).should.not.eql(0);

        db.close();
      });
    });
  },

  'test removing from an array atomically using MongooseArray#remove': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    var post = new BlogPost();
    post.numbers.push(1, 2, 3);

    post.save(function (err) {
      should.strictEqual(err, null);

      BlogPost.findById(post._id, function (err, doc) {
        should.strictEqual(err, null);

        doc.numbers.remove('1');
        doc.save(function (err) {
          should.strictEqual(err, null);

          BlogPost.findById(post.get('_id'), function (err, doc) {
            should.strictEqual(err, null);

            doc.numbers.should.have.length(2);
            doc.numbers.remove('2', '3');

            doc.save(function (err) {
              should.strictEqual(err, null);

              BlogPost.findById(post._id, function (err, doc) {
                should.strictEqual(err, null);

                doc.numbers.should.have.length(0);
                db.close();
              });
            });
          });
        });
      });
    });
  },

  'test getting a virtual property via get(...)': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection)
      , post = new BlogPost({
            title: 'Letters from Earth'
          , author: 'Mark Twain'
        });

    post.get('titleWithAuthor').should.equal('Letters from Earth by Mark Twain');

    db.close();
  },

  'test setting a virtual property': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection)
      , post = new BlogPost();

    post.set('titleWithAuthor', 'Huckleberry Finn by Mark Twain')
    post.get('title').should.equal('Huckleberry Finn');
    post.get('author').should.equal('Mark Twain');

    db.close();
  },

  'test getting a virtual property via shortcut getter': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection)
      , post = new BlogPost({
            title: 'Letters from Earth'
          , author: 'Mark Twain'
        });

    post.titleWithAuthor.should.equal('Letters from Earth by Mark Twain');

    db.close();
  },

  'saving a doc with a set virtual property should persist the real properties but not the virtual property': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection)
      , post = new BlogPost();

    post.set('titleWithAuthor', 'Huckleberry Finn by Mark Twain')
    post.get('title').should.equal('Huckleberry Finn');
    post.get('author').should.equal('Mark Twain');

    post.save(function (err) {
      should.strictEqual(err, null);

      BlogPost.findById(post.get('_id'), function (err, found) {
        should.strictEqual(err, null);

        found.get('title').should.equal('Huckleberry Finn');
        found.get('author').should.equal('Mark Twain');
        found.toObject().should.not.have.property('titleWithAuthor');
        db.close();
      });
    });
  },

  'test setting a pseudo-nested virtual property': function () {
    var db = start()
      , PersonSchema = new Schema({
          name: {
              first: String
            , last: String
          }
        });

    PersonSchema.virtual('name.full')
      .get( function () {
        return this.get('name.first') + ' ' + this.get('name.last');
      })
      .set( function (fullName) {
        var split = fullName.split(' ');
        this.set('name.first', split[0]);
        this.set('name.last', split[1]);
      });

    mongoose.model('Person', PersonSchema);

    var Person = db.model('Person')
      , person = new Person({
          name: {
              first: 'Michael'
            , last: 'Sorrentino'
          }
        });

    person.get('name.full').should.equal('Michael Sorrentino');
    person.set('name.full', 'The Situation');
    person.get('name.first').should.equal('The');
    person.get('name.last').should.equal('Situation');

    person.name.full.should.equal('The Situation');
    person.name.full = 'Michael Sorrentino';
    person.name.first.should.equal('Michael');
    person.name.last.should.equal('Sorrentino');

    db.close();
  },

  'test removing all documents from a collection via Model.remove': function () {
    var db = start()
      , collection = 'blogposts_' + random()
      , BlogPost = db.model('BlogPost', collection)
      , post = new BlogPost();

    post.save(function (err) {
      should.strictEqual(err, null);

      BlogPost.find({}, function (err, found) {
        should.strictEqual(err, null);
        
        found.should.have.length(1);
        
        BlogPost.remove({}, function (err) {
          should.strictEqual(!!err, false);

          BlogPost.find({}, function (err, found2) {
            should.strictEqual(err, null);

            found2.should.have.length(0);
            db.close();
          });
        });
      });
    });
  },

  // GH-190
  'test shorcut getter for a type defined with { type: Native }': function () {
    var schema = new Schema({
        date: { type: Date }
    });

    mongoose.model('ShortcutGetterObject', schema);

    var db = start()
      , ShortcutGetter = db.model('ShortcutGetterObject', 'shortcut' + random())
      , post = new ShortcutGetter();

    post.set('date', Date.now());
    post.date.should.be.an.instanceof(Date);

    db.close();
  },

  'test shortcut getter for a nested path': function () {
    var schema = new Schema({
      first: {
        second: [Number]
      }
    });
    mongoose.model('ShortcutGetterNested', schema);

    var db = start()
      , ShortcutGetterNested = db.model('ShortcutGetterNested', collection)
      , doc = new ShortcutGetterNested();

    doc.first.should.be.a('object');
    doc.first.second.should.be.an.instanceof(MongooseArray);

    db.close();
  },

  // GH-195
  'test that save on an unaltered model doesn\'t clear the document': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    var post = new BlogPost();
    post.title = 'woot';
    post.save(function (err) {
      should.strictEqual(err, null);

      BlogPost.findById(post._id, function (err, doc) {
        should.strictEqual(err, null);

        // we deliberately make no alterations
        doc.save(function (err) {
          should.strictEqual(err, null);

          BlogPost.findById(doc._id, function (err, doc) {
            should.strictEqual(err, null);

            doc.title.should.eql('woot');
            db.close();
          });
        });
      });
    });
  },

  'test that safe mode is the default and it works': function () {
    var Human = new Schema({
        name  : String
      , email : { type: String, unique: true }
    });

    mongoose.model('SafeHuman', Human, true);

    var db = start()
      , Human = db.model('SafeHuman', 'safehuman' + random());

    var me = new Human({
        name  : 'Guillermo Rauch'
      , email : 'rauchg@gmail.com'
    });

    me.save(function (err) {
      should.strictEqual(err, null);

      Human.findById(me._id, function (err, doc){
        should.strictEqual(err, null);
        doc.email.should.eql('rauchg@gmail.com');

        var copycat = new Human({
            name  : 'Lionel Messi'
          , email : 'rauchg@gmail.com'
        });

        copycat.save(function (err) {
          /duplicate/.test(err.message).should.be.true;
          err.should.be.an.instanceof(Error);
          db.close();
        });
      });
    });
  },

  'test that safe mode can be turned off': function () {
    var Human = new Schema({
        name  : String
      , email : { type: String, unique: true }
    });

    // turn it off
    Human.set('safe', false);

    mongoose.model('UnsafeHuman', Human, true);

    var db = start()
      , Human = db.model('UnsafeHuman', 'unsafehuman' + random());

    var me = new Human({
        name  : 'Guillermo Rauch'
      , email : 'rauchg@gmail.com'
    });

    me.save(function (err) {
      should.strictEqual(err, null);

      Human.findById(me._id, function (err, doc){
        should.strictEqual(err, null);
        doc.email.should.eql('rauchg@gmail.com');

        var copycat = new Human({
            name  : 'Lionel Messi'
          , email : 'rauchg@gmail.com'
        });

        copycat.save(function (err) {
          should.strictEqual(err, null);
          db.close();
        });
      });
    });
  },

  'passing null in pre hook works': function () {
    var db = start();
    var schema = new Schema({ name: String });

    schema.pre('save', function (next) {
      next(null); // <<-----
    });

    var S = db.model('S', schema, collection);
    var s = new S({name: 'zupa'});

    s.save(function (err) {
      db.close();
      should.strictEqual(null, err);
    });

  },

  'test post hooks': function () {
    var schema = new Schema({
            title: String
        })
      , save = false
      , remove = false
      , init = false;

    schema.post('save', function () {
      save = true;
    });

    schema.post('init', function () {
      init = true;
    });

    schema.post('remove', function () {
      remove = true;
    });

    mongoose.model('PostHookTest', schema);

    var db = start()
      , BlogPost = db.model('PostHookTest');

    var post = new BlogPost();

    post.save(function (err) {
      process.nextTick(function () {
        should.strictEqual(err, null);
        save.should.be.true;

        BlogPost.findById(post._id, function (err, doc) {
          process.nextTick(function () {
            should.strictEqual(err, null);
            init.should.be.true;

            doc.remove(function (err) {
              process.nextTick(function () {
                should.strictEqual(err, null);
                remove.should.be.true;
                db.close();
              });
            });
          });
        });
      });
    });
  },

  'test count querying via #run (aka #exec)': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    BlogPost.create({title: 'interoperable count as promise'}, function (err, created) {
      should.strictEqual(err, null);
      var query = BlogPost.count({title: 'interoperable count as promise'});
      query.exec(function (err, count) {
        should.strictEqual(err, null);
        count.should.equal(1);
        db.close();
      });
    });
  },

  'test update querying via #run (aka #exec)': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    BlogPost.create({title: 'interoperable update as promise'}, function (err, created) {
      should.strictEqual(err, null);
      var query = BlogPost.update({title: 'interoperable update as promise'}, {title: 'interoperable update as promise delta'});
      query.exec(function (err) {
        should.strictEqual(err, null);
        BlogPost.count({title: 'interoperable update as promise delta'}, function (err, count) {
          should.strictEqual(err, null);
          count.should.equal(1);
          db.close();
        });
      });
    });
  },

  'test findOne querying via #run (aka #exec)': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    BlogPost.create({title: 'interoperable findOne as promise'}, function (err, created) {
      should.strictEqual(err, null);
      var query = BlogPost.findOne({title: 'interoperable findOne as promise'});
      query.exec(function (err, found) {
        should.strictEqual(err, null);
        found._id.should.eql(created._id);
        db.close();
      });
    });
  },

  'test find querying via #run (aka #exec)': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    BlogPost.create(
        {title: 'interoperable find as promise'}
      , {title: 'interoperable find as promise'}
      , function (err, createdOne, createdTwo) {
      should.strictEqual(err, null);
      var query = BlogPost.find({title: 'interoperable find as promise'});
      query.exec(function (err, found) {
        should.strictEqual(err, null);
        found.should.have.length(2);
        found[0]._id.should.eql(createdOne._id);
        found[1]._id.should.eql(createdTwo._id);
        db.close();
      });
    });
  },

  'test remove querying via #run (aka #exec)': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    BlogPost.create(
        {title: 'interoperable remove as promise'}
      , function (err, createdOne, createdTwo) {
      should.strictEqual(err, null);
      var query = BlogPost.remove({title: 'interoperable remove as promise'});
      query.exec(function (err) {
        should.strictEqual(err, null);
        BlogPost.count({title: 'interoperable remove as promise'}, function (err, count) {
          db.close();
          count.should.equal(0);
        });
      });
    });
  },

  'test changing query at the last minute via #run(op, callback)': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    BlogPost.create({title: 'interoperable ad-hoc as promise'}, function (err, created) {
      should.strictEqual(err, null);
      var query = BlogPost.count({title: 'interoperable ad-hoc as promise'});
      query.exec('findOne', function (err, found) {
        should.strictEqual(err, null);
        found._id.should.eql(created._id);
        db.close();
      });
    });
  },

  'test count querying via #run (aka #exec) with promise': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    BlogPost.create({title: 'interoperable count as promise 2'}, function (err, created) {
      should.strictEqual(err, null);
      var query = BlogPost.count({title: 'interoperable count as promise 2'});
      var promise = query.exec();
      promise.addBack(function (err, count) {
        should.strictEqual(err, null);
        count.should.equal(1);
        db.close();
      });
    });
  },

  'test update querying via #run (aka #exec) with promise': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    BlogPost.create({title: 'interoperable update as promise 2'}, function (err, created) {
      should.strictEqual(err, null);
      var query = BlogPost.update({title: 'interoperable update as promise 2'}, {title: 'interoperable update as promise delta 2'});
      var promise = query.run();
      promise.addBack(function (err) {
        should.strictEqual(err, null);
        BlogPost.count({title: 'interoperable update as promise delta 2'}, function (err, count) {
          should.strictEqual(err, null);
          count.should.equal(1);
          db.close();
        });
      });
    });
  },

  'test findOne querying via #run (aka #exec) with promise': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    BlogPost.create({title: 'interoperable findOne as promise 2'}, function (err, created) {
      should.strictEqual(err, null);
      var query = BlogPost.findOne({title: 'interoperable findOne as promise 2'});
      var promise = query.exec();
      promise.addBack(function (err, found) {
        should.strictEqual(err, null);
        found._id.should.eql(created._id);
        db.close();
      });
    });
  },

  'test find querying via #run (aka #exec) with promise': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    BlogPost.create(
        {title: 'interoperable find as promise 2'}
      , {title: 'interoperable find as promise 2'}
      , function (err, createdOne, createdTwo) {
      should.strictEqual(err, null);
      var query = BlogPost.find({title: 'interoperable find as promise 2'});
      var promise = query.run();
      promise.addBack(function (err, found) {
        should.strictEqual(err, null);
        found.should.have.length(2);
        found[0]._id.should.eql(createdOne._id);
        found[1]._id.should.eql(createdTwo._id);
        db.close();
      });
    });
  },

  'test remove querying via #run (aka #exec) with promise': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    BlogPost.create(
        {title: 'interoperable remove as promise 2'}
      , function (err, createdOne, createdTwo) {
      should.strictEqual(err, null);
      var query = BlogPost.remove({title: 'interoperable remove as promise 2'});
      var promise = query.exec();
      promise.addBack(function (err) {
        should.strictEqual(err, null);
        BlogPost.count({title: 'interoperable remove as promise 2'}, function (err, count) {
          count.should.equal(0);
          db.close();
        });
      });
    });
  },

  'test changing query at the last minute via #run(op) with promise': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    BlogPost.create({title: 'interoperable ad-hoc as promise 2'}, function (err, created) {
      should.strictEqual(err, null);
      var query = BlogPost.count({title: 'interoperable ad-hoc as promise 2'});
      var promise = query.exec('findOne');
      promise.addBack(function (err, found) {
        should.strictEqual(err, null);
        found._id.should.eql(created._id);
        db.close();
      });
    });
  },

  'test nested obj literal getter/setters': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    var date = new Date;

    var meta = {
        date: date
      , visitors: 5
    };

    var post = new BlogPost()
    post.init({
        meta: meta
    });

    post.get('meta').date.should.be.an.instanceof(Date);
    post.meta.date.should.be.an.instanceof(Date);

    var threw = false;
    var getter1;
    var getter2;
    var strmet;
    try {
      strmet = JSON.stringify(meta);
      getter1 = JSON.stringify(post.get('meta'));
      getter2 = JSON.stringify(post.meta);
    } catch (err) {
      threw = true;
    }

    threw.should.be.false;
    getter1 = JSON.parse(getter1);
    getter2 = JSON.parse(getter2);
    getter1.visitors.should.eql(getter2.visitors);
    getter1.date.should.eql(getter2.date);

    post.meta.date = new Date - 1000;
    post.meta.date.should.be.an.instanceof(Date);
    post.get('meta').date.should.be.an.instanceof(Date);

    post.meta.visitors = 2;
    post.get('meta').visitors.should.be.an.instanceof(MongooseNumber);
    post.meta.visitors.should.be.an.instanceof(MongooseNumber);

    var newmeta = {
        date: date - 2000
      , visitors: 234
    };

    post.set(newmeta, 'meta');

    post.meta.date.should.be.an.instanceof(Date);
    post.get('meta').date.should.be.an.instanceof(Date);
    post.meta.visitors.should.be.an.instanceof(MongooseNumber);
    post.get('meta').visitors.should.be.an.instanceof(MongooseNumber);
    (+post.meta.date).should.eql(date - 2000);
    (+post.get('meta').date).should.eql(date - 2000);
    (+post.meta.visitors).should.eql(234);
    (+post.get('meta').visitors).should.eql(234);

    // set object directly
    post.meta = {
        date: date - 3000
      , visitors: 4815162342
    };

    post.meta.date.should.be.an.instanceof(Date);
    post.get('meta').date.should.be.an.instanceof(Date);
    post.meta.visitors.should.be.an.instanceof(MongooseNumber);
    post.get('meta').visitors.should.be.an.instanceof(MongooseNumber);
    (+post.meta.date).should.eql(date - 3000);
    (+post.get('meta').date).should.eql(date - 3000);
    (+post.meta.visitors).should.eql(4815162342);
    (+post.get('meta').visitors).should.eql(4815162342);

    db.close();
  },

  'nested object property access works when root initd with null': function () {
    var db = start()

    var schema = new Schema({
      nest: {
        st: String
      }
    });

    mongoose.model('NestedStringA', schema);
    var T = db.model('NestedStringA', collection);

    var t = new T({ nest: null });

    should.strictEqual(t.nest.st, null);
    t.nest = { st: "jsconf rules" };
    t.nest.toObject().should.eql({ st: "jsconf rules" });
    t.nest.st.should.eql("jsconf rules");

    t.save(function (err) {
      should.strictEqual(err, null);
      db.close();
    })

  },

  'nested object property access works when root initd with undefined': function () {
    var db = start()

    var schema = new Schema({
      nest: {
        st: String
      }
    });

    mongoose.model('NestedStringB', schema);
    var T = db.model('NestedStringB', collection);

    var t = new T({ nest: undefined });

    should.strictEqual(t.nest.st, undefined);
    t.nest = { st: "jsconf rules" };
    t.nest.toObject().should.eql({ st: "jsconf rules" });
    t.nest.st.should.eql("jsconf rules");

    t.save(function (err) {
      should.strictEqual(err, null);
      db.close();
    })
  },

  're-saving object with pre-existing null nested object': function(){
    var db = start()

    var schema = new Schema({
      nest: {
          st: String
        , yep: String
      }
    });

    mongoose.model('NestedStringC', schema);
    var T = db.model('NestedStringC', collection);

    var t = new T({ nest: null });

    t.save(function (err) {
      should.strictEqual(err, null);

      t.nest = { st: "jsconf rules", yep: "it does" };
      t.save(function (err) {
        should.strictEqual(err, null);

        T.findById(t.id, function (err, t) {
          should.strictEqual(err, null);
          t.nest.st.should.eql("jsconf rules");
          t.nest.yep.should.eql("it does");

          t.nest = null;
          t.save(function (err) {
            should.strictEqual(err, null);
            should.strictEqual(t._doc.nest, null);
            db.close();
          });
        });
      });
    });
  },

  'pushing to a nested array of Mixed works on existing doc': function () {
    var db = start();

    mongoose.model('MySchema', new Schema({
      nested: {
        arrays: []
      }
    }));

    var DooDad = db.model('MySchema')
      , doodad = new DooDad({ nested: { arrays: [] } })
      , date = 1234567890;

    doodad.nested.arrays.push(["+10", "yup", date]);

    doodad.save(function (err) {
      should.strictEqual(err, null);

      DooDad.findById(doodad._id, function (err, doodad) {
        should.strictEqual(err, null);

        doodad.nested.arrays.toObject().should.eql([['+10','yup',date]]);

        doodad.nested.arrays.push(["another", 1]);

        doodad.save(function (err) {
          should.strictEqual(err, null);

          DooDad.findById(doodad._id, function (err, doodad) {
            should.strictEqual(err, null);

            doodad
            .nested
            .arrays
            .toObject()
            .should.eql([['+10','yup',date], ["another", 1]]);

            db.close();
          });
        });
      })
    });

  },

  'directly setting nested props works when property is named "type"': function () {
    var db = start();

    function def () {
      return [{ x: 1 }, { x: 2 }, { x:3 }]
    }

    mongoose.model('MySchema2', new Schema({
      nested: {
          type: { type: String, default: 'yep' }
        , array: {
            type: Array, default: def
          }
      }
    }));

    var DooDad = db.model('MySchema2', collection)
      , doodad = new DooDad()

    doodad.save(function (err) {
      should.strictEqual(err, null);

      DooDad.findById(doodad._id, function (err, doodad) {
        should.strictEqual(err, null);

        doodad.nested.type.should.eql("yep");
        doodad.nested.array.toObject().should.eql([{x:1},{x:2},{x:3}]);

        doodad.nested.type = "nope";
        doodad.nested.array = ["some", "new", "stuff"];

        doodad.save(function (err) {
          should.strictEqual(err, null);

          DooDad.findById(doodad._id, function (err, doodad) {
            should.strictEqual(err, null);
            db.close();

            doodad.nested.type.should.eql("nope");

            doodad
            .nested
            .array
            .toObject()
            .should.eql(["some", "new", "stuff"]);

          });
        });
      })
    });
  },

  'system.profile should be a default model': function () {
    var Profile = mongoose.model('system.profile');
    Profile.schema.paths.ts.should.be.a('object');
    Profile.schema.paths.info.should.be.a('object');
    Profile.schema.paths.millis.should.be.a('object');

    var db = start();
    Profile = db.model('system.profile');
    Profile.schema.paths.ts.should.be.a('object');
    Profile.schema.paths.info.should.be.a('object');
    Profile.schema.paths.millis.should.be.a('object');
    db.close();
  },

  'setting profiling levels': function () {
    var db = start();
    db.setProfiling(3, function (err) {
      err.message.should.eql('Invalid profiling level: 3');
      db.setProfiling('fail', function (err) {
        err.message.should.eql('Invalid profiling level: fail');
        db.setProfiling(2, function (err, doc) {
          should.strictEqual(err, null);
          db.setProfiling(1, 50, function (err, doc) {
            should.strictEqual(err, null);
            doc.was.should.eql(2);
            db.setProfiling(0, function (err, doc) {
              db.close();
              should.strictEqual(err, null);
              doc.was.should.eql(1);
              doc.slowms.should.eql(50);
            });
          });
        });
      });
    });
  },

  'test post hooks on embedded documents': function(){
    var save = false,
        init = false,
        remove = false;

    var EmbeddedSchema = new Schema({
      title : String
    });

    var ParentSchema = new Schema({
      embeds : [EmbeddedSchema]
    });

    EmbeddedSchema.post('save', function(next){
      save = true;
    });

    // Don't know how to test those on a embedded document.
    //EmbeddedSchema.post('init', function () {
      //init = true;
    //});

    //EmbeddedSchema.post('remove', function () {
      //remove = true;
    //});

    mongoose.model('Parent', ParentSchema);

    var db = start(),
        Parent = db.model('Parent');

    var parent = new Parent();

    parent.embeds.push({title: 'Testing post hooks for embedded docs'});

    parent.save(function(err){
      db.close();
      should.strictEqual(err, null);
      save.should.be.true;
    });
  },

  'console.log shows helpful values': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    var date = new Date(1305730951086);
    var id0 = new DocumentObjectId('4dd3e169dbfb13b4570000b9');
    var id1 = new DocumentObjectId('4dd3e169dbfb13b4570000b6');
    var id2 = new DocumentObjectId('4dd3e169dbfb13b4570000b7');
    var id3 = new DocumentObjectId('4dd3e169dbfb13b4570000b8');

    var post = new BlogPost({
        title: 'Test'
      , _id: id0
      , date: date
      , numbers: [5,6,7]
      , owners: [id1]
      , meta: { visitors: 45 }
      , comments: [
          { _id: id2, title: 'my comment', date: date, body: 'this is a comment' },
          { _id: id3, title: 'the next thang', date: date, body: 'this is a comment too!' }]
    });

    db.close();

    var a = '{ meta: { visitors: 45 },\n  numbers: [ 5, 6, 7 ],\n  owners: [ 4dd3e169dbfb13b4570000b6 ],\n  comments: \n   [{ _id: 4dd3e169dbfb13b4570000b7,\n     comments: [],\n     body: \'this is a comment\',\n     date: Wed, 18 May 2011 15:02:31 GMT,\n     title: \'my comment\' }\n   { _id: 4dd3e169dbfb13b4570000b8,\n     comments: [],\n     body: \'this is a comment too!\',\n     date: Wed, 18 May 2011 15:02:31 GMT,\n     title: \'the next thang\' }],\n  _id: 4dd3e169dbfb13b4570000b9,\n  date: Wed, 18 May 2011 15:02:31 GMT,\n  title: \'Test\' }'

    var out = post.inspect();
    ;/meta: { visitors: 45 }/.test(out).should.be.true;
    ;/numbers: \[ 5, 6, 7 \]/.test(out).should.be.true;
    ;/date: Wed, 18 May 2011 15:02:31 GMT/.test(out).should.be.true;
    ;/activePaths:/.test(out).should.be.false;
    ;/_atomics:/.test(out).should.be.false;
  },

  'path can be used as pathname': function () {
    var db = start()
      , P = db.model('pathnametest', new Schema({ path: String }))
    db.close();

    var threw = false;
    try {
      new P({ path: 'i should not throw' });
    } catch (err) {
      threw = true;
    }

    threw.should.be.false;
  },

  'when mongo is down, save callback should fire with err if auto_reconnect is disabled': function () {
    var db = start({ server: { auto_reconnect: false }});
    var T = db.model('Thing', new Schema({ type: String }));
    db.on('open', function () {
      var t = new T({ type: "monster" });

      var worked = false;
      t.save(function (err) {
        worked = true;
        err.message.should.eql('notConnected');
      });

      process.nextTick(function () {
        db.close();
      });

      setTimeout(function () {
        worked.should.be.true;
      }, 500);
    });
  },

  /*
  'when mongo is down, auto_reconnect should kick in and db operation should succeed': function () {
    var db = start();
    var T = db.model('Thing', new Schema({ type: String }));
    db.on('open', function () {
      var t = new T({ type: "monster" });

      var worked = false;
      t.save(function (err) {
        should.strictEqual(err, null);
        worked = true;
      });

      process.nextTick(function () {
        db.close();
      });

      setTimeout(function () {
        worked.should.be.true;
      }, 500);
    });
  },
  */

  'subdocuments with changed values should persist the values': function () {
    var db = start()
    var Subdoc = new Schema({ name: String, mixed: Schema.Types.Mixed });
    var T = db.model('SubDocMixed', new Schema({ subs: [Subdoc] }));

    var t = new T({ subs: [{ name: "Hubot", mixed: { w: 1, x: 2 }}] });
    t.subs[0].name.should.equal("Hubot");
    t.subs[0].mixed.w.should.equal(1);
    t.subs[0].mixed.x.should.equal(2);

    t.save(function (err) {
      should.strictEqual(null, err);

      T.findById(t._id, function (err, t) {
        should.strictEqual(null, err);
        t.subs[0].name.should.equal("Hubot");
        t.subs[0].mixed.w.should.equal(1);
        t.subs[0].mixed.x.should.equal(2);

        var sub = t.subs[0];
        sub.name = "Hubot1";
        sub.name.should.equal("Hubot1");
        sub.isModified('name').should.be.true;
        t.modified.should.be.true;

        t.save(function (err) {
          should.strictEqual(null, err);

          T.findById(t._id, function (err, t) {
            should.strictEqual(null, err);
            should.strictEqual(t.subs[0].name, "Hubot1");

            var sub = t.subs[0];
            sub.mixed.w = 5;
            sub.mixed.w.should.equal(5);
            sub.isModified('mixed').should.be.false;
            sub.commit('mixed');
            sub.isModified('mixed').should.be.true;
            sub.modified.should.be.true;
            t.modified.should.be.true;

            t.save(function (err) {
              should.strictEqual(null, err);

              T.findById(t._id, function (err, t) {
                db.close();
                should.strictEqual(null, err);
                should.strictEqual(t.subs[0].mixed.w, 5);
              })
            })
          });
        });
      })
    })
  },

  'RegExps can be saved': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    var post = new BlogPost({ mixed: { rgx: /^asdf$/ } });
    post.mixed.rgx.should.be.instanceof(RegExp);
    post.mixed.rgx.source.should.eql('^asdf$');
    post.save(function (err) {
      should.strictEqual(err, null);
      BlogPost.findById(post._id, function (err, post) {
        db.close();
        should.strictEqual(err, null);
        post.mixed.rgx.should.be.instanceof(RegExp);
        post.mixed.rgx.source.should.eql('^asdf$');
      });
    });
  },

  'null defaults are allowed': function () {
    var db = start();
    var T = db.model('NullDefault', new Schema({ name: { type: String, default: null }}), collection);
    var t = new T();

    should.strictEqual(null, t.name);

    t.save(function (err) {
      should.strictEqual(null, err);

      T.findById(t._id, function (err, t) {
        db.close();
        should.strictEqual(null, err);
        should.strictEqual(null, t.name);
      });
    });
  },

  // GH-365, GH-390, GH-422
  'test that setters are used on embedded documents': function () {
    var db = start();

    function setLat (val) {
      return parseInt(val);
    }

    var tick = 0;
    function uptick () {
      return ++tick;
    }

    var Location = new Schema({
        lat:  { type: Number, default: 0, set: setLat}
      , long: { type: Number, set: uptick }
    });

    var Deal = new Schema({
        title: String
      , locations: [Location]
    });

    Location = db.model('Location', Location, 'locations_' + random());
    Deal = db.model('Deal', Deal, 'deals_' + random());

    var location = new Location({lat: 1.2, long: 10});
    location.lat.valueOf().should.equal(1);
    location.long.valueOf().should.equal(1);

    var deal = new Deal({title: "My deal", locations: [{lat: 1.2, long: 33}]});
    deal.locations[0].lat.valueOf().should.equal(1);
    deal.locations[0].long.valueOf().should.equal(2);

    deal.save(function (err) {
      should.strictEqual(err, null);
      Deal.findById(deal._id, function (err, deal) {
        db.close();
        should.strictEqual(err, null);
        deal.locations[0].lat.valueOf().should.equal(1);
        // GH-422
        deal.locations[0].long.valueOf().should.equal(2);
      });
    });
  },

  // GH-289
  'test that pre-init middleware has access to the true ObjectId when used with querying': function () {
    var db = start()
      , PreInitSchema = new Schema({})
      , preId;
    PreInitSchema.pre('init', function (next) {
      preId = this._id;
      next();
    });
    var PreInit = db.model('PreInit', PreInitSchema, 'pre_inits' + random());

    var doc = new PreInit();
    doc.save( function (err) {
      should.strictEqual(err, null);
      PreInit.findById(doc._id, function (err, found) {
        db.close();
        should.strictEqual(err, null);
        should.strictEqual(undefined, preId);
      });
    });
  },

  // Demonstration showing why GH-261 is a misunderstanding
  'a single instantiated document should be able to update its embedded documents more than once': function () {
    var db = start()
      , BlogPost = db.model('BlogPost', collection);

    var post = new BlogPost();
    post.comments.push({title: 'one'});
    post.save(function (err) {
      should.strictEqual(err, null);
      post.comments[0].title.should.eql('one');
      post.comments[0].title = 'two';
      post.comments[0].title.should.eql('two');
      post.save( function (err) {
        should.strictEqual(err, null);
        BlogPost.findById(post._id, function (err, found) {
          should.strictEqual(err, null);
          db.close();
          should.strictEqual(err, null);
          found.comments[0].title.should.eql('two');
        });
      });
    });
  },

  'defining a method on a Schema corresponding to an EmbeddedDocument should generate an instance method for the ED': function () {
    var db = start();
    var ChildSchema = new Schema({ name: String });
    ChildSchema.method('talk', function () {
      return 'gaga';
    });

    var ParentSchema = new Schema({
      children: [ChildSchema]
    });

    var ChildA = db.model('ChildA', ChildSchema, 'children_' + random());
    var ParentA = db.model('ParentA', ParentSchema, 'parents_' + random());

    var c = new ChildA;
    c.talk.should.be.a('function');

    var p = new ParentA();
    p.children.push({});
    p.children[0].talk.should.be.a('function');
    db.close();
  },

  'Model#save should emit an error on its db if a callback is not passed to it': function () {
    var db = start();

    var DefaultErrSchema = new Schema({});

    var err = "";

    DefaultErrSchema.pre('save', function (next, fn) {
      try {
        next(new Error);
      } catch (error) {
        // throws b/c nothing is listening to the error event
        error.should.be.instanceof(Error);

        db.on('error', function (err) {
          db.close();
          err.should.be.an.instanceof(Error);
        });

        next(new Error);
      }
    });

    var DefaultErr = db.model('DefaultErr', DefaultErrSchema, 'default_err_' + random());

    var e = new DefaultErr();

    e.save();
  },

  'ensureIndex error should emit on the db': function () {
    var db = start();

    db.on('error', function (err) {
      /^E11000 duplicate key error index:/.test(err.message).should.equal(true);
      db.close();
    });

    var schema = new Schema({ name: { type: String } })
      , Test = db.model('IndexError', schema, "x"+random());

    Test.create({ name: 'hi' }, { name: 'hi' }, function (err) {
      should.strictEqual(err, null);
      Test.schema.index({ name: 1 }, { unique: true });
      Test.init();
    });
  },

  'backward compatibility with conflicted data in the db': function () {
    var db = start();
    var M = db.model('backwardDataConflict', new Schema({ namey: { first: String, last: String }}));
    var m = new M({ namey: "[object Object]" });
    m.namey = { first: 'GI', last: 'Joe' };// <-- should overwrite the string
    m.save(function (err) {
      db.close();
      should.strictEqual(err, null);
      should.strictEqual('GI', m.namey.first);
      should.strictEqual('Joe', m.namey.last);
    });
  },

  '#push should work on EmbeddedDocuments more than 2 levels deep': function () {
    var db = start()
      , Post = db.model('BlogPost', collection)
      , Comment = db.model('CommentNesting', Comments, collection);

    var p =new Post({ title: "comment nesting" });
    var c1 =new Comment({ title: "c1" });
    var c2 =new Comment({ title: "c2" });
    var c3 =new Comment({ title: "c3" });

    p.comments.push(c1);
    c1.comments.push(c2);
    c2.comments.push(c3);

    p.save(function (err) {
      should.strictEqual(err, null);

      Post.findById(p._id, function (err, p) {
        should.strictEqual(err, null);

        var c4=new Comment({ title: "c4" });
        p.comments[0].comments[0].comments[0].comments.push(c4);
        p.save(function (err) {
          should.strictEqual(err, null);

          Post.findById(p._id, function (err, p) {
            db.close();
            should.strictEqual(err, null);
            p.comments[0].comments[0].comments[0].comments[0].title.should.equal('c4');
          });
        });
      });
    })

  },

  'test standalone invalidate': function() {
    var db = start()
      , InvalidateSchema = null
      , Post = null
      , post = null;

    InvalidateSchema = new Schema({
      prop: { type: String },
    });

    mongoose.model('InvalidateSchema', InvalidateSchema);

    Post = db.model('InvalidateSchema');
    post = new Post();
    post.set({baz: 'val'});
    post.invalidate('baz', 'reason');

    post.save(function(err){
      err.should.be.an.instanceof(MongooseError);
      err.should.be.an.instanceof(ValidationError);

      err.errors.baz.should.be.an.instanceof(ValidatorError);
      err.errors.baz.message.should.equal('Validator "reason" failed for path baz');
      err.errors.baz.type.should.equal('reason');
      err.errors.baz.path.should.equal('baz');

      post.save(function(err){
        db.close();
        should.strictEqual(err, null);
      });
    });
  },

  'test simple validation middleware': function() {
    var db = start()
      , ValidationMiddlewareSchema = null
      , Post = null
      , post = null;

    ValidationMiddlewareSchema = new Schema({
      baz: { type: String }
    });

    ValidationMiddlewareSchema.pre('validate', function(next) {
      if (this.get('baz') == 'bad') {
        this.invalidate('baz', 'bad');
      }
      next();
    });

    mongoose.model('ValidationMiddleware', ValidationMiddlewareSchema);

    Post = db.model('ValidationMiddleware');
    post = new Post();
    post.set({baz: 'bad'});

    post.save(function(err){
      err.should.be.an.instanceof(MongooseError);
      err.should.be.an.instanceof(ValidationError);
      err.errors.baz.type.should.equal('bad');
      err.errors.baz.path.should.equal('baz');

      post.set('baz', 'good');
      post.save(function(err){
        db.close();
        should.strictEqual(err, null);
      });
    });
  },

  'test async validation middleware': function() {
    var db = start()
      , AsyncValidationMiddlewareSchema = null
      , Post = null
      , post = null;

    AsyncValidationMiddlewareSchema = new Schema({
      prop: { type: String }
    });

    AsyncValidationMiddlewareSchema.pre('validate', true, function(next, done) {
      var self = this;
      setTimeout(function() {
        if (self.get('prop') == 'bad') {
          self.invalidate('prop', 'bad');
        }
        done();
      }, 50);
      next();
    });

    mongoose.model('AsyncValidationMiddleware', AsyncValidationMiddlewareSchema);

    Post = db.model('AsyncValidationMiddleware');
    post = new Post();
    post.set({prop: 'bad'});

    post.save(function(err){
      err.should.be.an.instanceof(MongooseError);
      err.should.be.an.instanceof(ValidationError);
      err.errors.prop.type.should.equal('bad');
      err.errors.prop.path.should.equal('prop');

      post.set('prop', 'good');
      post.save(function(err){
        db.close();
        should.strictEqual(err, null);
      });
    });
  },

  'test complex validation middleware': function() {
    var db = start()
      , ComplexValidationMiddlewareSchema = null
      , Post = null
      , post = null
      , abc = function(v) {
          return v === 'abc';
        };

    ComplexValidationMiddlewareSchema = new Schema({
      baz: { type: String },
      abc: { type: String, validate: [abc, 'must be abc'] },
      test: { type: String, validate: [/test/, 'must also be abc'] },
      required: { type: String, required: true }
    });

    ComplexValidationMiddlewareSchema.pre('validate', true, function(next, done) {
      var self = this;
      setTimeout(function() {
        if (self.get('baz') == 'bad') {
          self.invalidate('baz', 'bad');
        }
        done();
      }, 50);
      next();
    });

    mongoose.model('ComplexValidationMiddleware', ComplexValidationMiddlewareSchema);

    Post = db.model('ComplexValidationMiddleware');
    post = new Post();
    post.set({
      baz: 'bad',
      abc: 'not abc',
      test: 'fail'
    });

    post.save(function(err){
      err.should.be.an.instanceof(MongooseError);
      err.should.be.an.instanceof(ValidationError);
      Object.keys(err.errors).length.should.equal(4);
      err.errors.baz.should.be.an.instanceof(ValidatorError);
      err.errors.baz.type.should.equal('bad');
      err.errors.baz.path.should.equal('baz');
      err.errors.abc.should.be.an.instanceof(ValidatorError);
      err.errors.abc.type.should.equal('must be abc');
      err.errors.abc.path.should.equal('abc');
      err.errors.test.should.be.an.instanceof(ValidatorError);
      err.errors.test.type.should.equal('must also be abc');
      err.errors.test.path.should.equal('test');
      err.errors.required.should.be.an.instanceof(ValidatorError);
      err.errors.required.type.should.equal('required');
      err.errors.required.path.should.equal('required');

      post.set({
        baz: 'good',
        abc: 'abc',
        test: 'test',
        required: 'here'
      });

      post.save(function(err){
        db.close();
        should.strictEqual(err, null);
      });
    });
  }

};