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triple_unicode_store_spec.js
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triple_unicode_store_spec.js
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var levelgraph = require('../lib/levelgraph')
, level = require('memdb')
, path = require('path')
, osenv = require('osenv');
describe('a basic unicode triple store', function() {
var db, leveldb = leveldb;
beforeEach(function() {
leveldb = level();
db = levelgraph(leveldb);
});
afterEach(function(done) {
db.close(done);
});
it('should put a triple', function(done) {
var triple = { subject: '车', predicate: '是', object: '交通工具' };
db.put(triple, done);
});
describe('with a triple inserted', function() {
var triple;
beforeEach(function(done) {
triple = { subject: '', predicate: '🜁', object: '🚃' };
db.put(triple, done);
});
it('should get it specifiying the subject', function(done) {
db.get({ subject: '' }, function(err, list) {
expect(list).to.eql([triple]);
done();
});
});
it('should get it specifiying the object', function(done) {
db.get({ object: '🚃' }, function(err, list) {
expect(list).to.eql([triple]);
done();
});
});
it('should get it specifiying the predicate', function(done) {
db.get({ predicate: '🜁' }, function(err, list) {
expect(list).to.eql([triple]);
done();
});
});
it('should get it specifiying the subject and the predicate', function(done) {
db.get({ subject: '', predicate: '🜁' }, function(err, list) {
expect(list).to.eql([triple]);
done();
});
});
it('should get it specifiying the subject and the object', function(done) {
db.get({ subject: '', object: '🚃' }, function(err, list) {
expect(list).to.eql([triple]);
done();
});
});
it('should get it specifiying the predicate and the object', function(done) {
db.get({ predicate: '🜁', object: '🚃' }, function(err, list) {
expect(list).to.eql([triple]);
done();
});
});
it('should get it specifiying the subject and falsy params', function(done) {
db.get({ subject: '', predicate: false, object: null }, function(err, list) {
expect(list).to.eql([triple]);
done();
});
});
['subject', 'predicate', 'object'].forEach(function(type) {
it('should get nothing if nothing matches an only ' + type + ' query',
function(done) {
var query = {};
query[type] = 'notfound';
db.get(query, function(err, list) {
expect(list).to.eql([]);
done();
});
});
});
it('should return the triple through the getStream interface', function(done) {
var stream = db.getStream({ predicate: '🜁' });
stream.on('data', function(data) {
expect(data).to.eql(triple);
});
stream.on('end', done);
});
it('should return the triple through the getStream interface with falsy params', function(done) {
var stream = db.getStream({ subject: null, predicate: '🜁', object: false });
stream.on('data', function(data) {
expect(data).to.eql(triple);
});
stream.on('end', done);
});
it('should get the triple if limit 1 is used', function(done) {
db.get({ limit: 1 }, function(err, list) {
expect(list).to.eql([triple]);
done();
});
});
it('should get the triple if limit 0 is used', function(done) {
db.get({ limit: 0 }, function(err, list) {
expect(list).to.eql([triple]);
done();
});
});
it('should get the triple if offset 0 is used', function(done) {
db.get({ offset: 0 }, function(err, list) {
expect(list).to.eql([triple]);
done();
});
});
it('should not get the triple if offset 1 is used', function(done) {
db.get({ offset: 1 }, function(err, list) {
expect(list).to.eql([]);
done();
});
});
});
it('should put an array of triples', function(done) {
var t1 = { subject: '车', predicate: '是', object: '交通工具' }
, t2 = { subject: '车', predicate: '是', object: '动物' };
db.put([t1, t2], done);
});
it('should get only triples with exact match of subjects', function(done) {
var t1 = { subject: '飞机', predicate: '是', object: '交通工具' }
, t2 = { subject: '车', predicate: '是', object: '动物' };
db.put([t1, t2], function() {
db.get({ subject: '车' }, function(err, matched) {
expect(matched.length).to.eql(1);
expect(matched[0]).to.eql(t2);
done();
});
});
});
it('should put a triple with an object to false', function(done) {
var t = { subject: '车', predicate: '是', object: false };
db.put(t, function() {
leveldb.get('spo::车::是::false', done);
});
});
describe('with two triple inserted with the same predicate', function() {
var triple1
, triple2;
beforeEach(function(done) {
triple1 = { subject: '飞机', predicate: '是', object: '交通工具' };
triple2 = { subject: '狗熊', predicate: '是', object: '动物' };
db.put([triple1, triple2], done);
});
it('should get one by specifiying the subject', function(done) {
db.get({ subject: '飞机' }, function(err, list) {
expect(list).to.eql([triple1]);
done();
});
});
it('should get one by specifiying the subject and a falsy predicate', function(done) {
db.get({ subject: '飞机', predicate: null }, function(err, list) {
expect(list).to.eql([triple1]);
done();
});
});
it('should get two by specifiying the predicate', function(done) {
db.get({ predicate: '是' }, function(err, list) {
expect(list).to.eql([triple1, triple2]);
done();
});
});
it('should get two by specifiying the predicate and a falsy subject', function(done) {
db.get({ subject: null, predicate: '是' }, function(err, list) {
expect(list).to.eql([triple1, triple2]);
done();
});
});
it('should remove one and still return the other', function(done) {
db.del(triple2, function() {
db.get({ predicate: '是' }, function(err, list) {
expect(list).to.eql([triple1]);
done();
});
});
});
it('should return both triples through the getStream interface', function(done) {
var triples = [triple1, triple2]
, stream = db.getStream({ predicate: '是' });
stream.on('data', function(data) {
expect(data).to.eql(triples.shift());
});
stream.on('end', done);
});
it('should return only one triple with limit 1', function(done) {
db.get({ predicate: '是', limit: 1 }, function(err, list) {
expect(list).to.eql([triple1]);
done();
});
});
it('should return two triples with limit 2', function(done) {
db.get({ predicate: '是', limit: 2 }, function(err, list) {
expect(list).to.eql([triple1, triple2]);
done();
});
});
it('should return three triples with limit 3', function(done) {
db.get({ predicate: '是', limit: 3 }, function(err, list) {
expect(list).to.eql([triple1, triple2]);
done();
});
});
it('should support limit over streams', function(done) {
var triples = [triple1]
, stream = db.getStream({ predicate: '是', limit: 1 });
stream.on('data', function(data) {
expect(data).to.eql(triples.shift());
});
stream.on('end', done);
});
it('should return only one triple with offset 1', function(done) {
db.get({ predicate: '是', offset: 1 }, function(err, list) {
expect(list).to.eql([triple2]);
done();
});
});
it('should return only no triples with offset 2', function(done) {
db.get({ predicate: '是', offset: 2 }, function(err, list) {
expect(list).to.eql([]);
done();
});
});
it('should support offset over streams', function(done) {
var triples = [triple2]
, stream = db.getStream({ predicate: '是', offset: 1 });
stream.on('data', function(data) {
expect(data).to.eql(triples.shift());
});
stream.on('end', done);
});
it('should return the triples in reverse order with reverse true', function(done) {
db.get({ predicate: '是', reverse: true }, function(err, list) {
expect(list).to.eql([triple2, triple1]);
done();
});
});
it('should return the last triple with reverse true and limit 1', function(done) {
db.get({ predicate: '是', reverse: true, limit: 1 }, function(err, list) {
expect(list).to.eql([triple2]);
done();
});
});
it('should support reverse over streams', function(done) {
var triples = [triple2, triple1]
, stream = db.getStream({ predicate: '是', reverse: true });
stream.on('data', function(data) {
expect(data).to.eql(triples.shift());
});
stream.on('end', done);
});
});
describe('with 10 triples inserted', function() {
beforeEach(function (done) {
var triples = [];
for (var i = 0; i < 10; i++) {
triples[i] = { subject: '测试项', predicate: '推导', object: '目标' + i };
}
db.put(triples, done);
});
if (!process.browser) {
it('should return the approximate size', function(done) {
db.approximateSize({ predicate: '是' }, function (err, size) {
expect(size).to.be.a('number');
done(err);
});
});
}
});
it('should put triples using a stream', function(done) {
var t1 = { subject: '车', predicate: '是', object: '交通工具' };
var t2 = { subject: '车', predicate: '是', object: '动物' };
var stream = db.putStream();
stream.on('close', done);
stream.write(t1);
stream.end(t2);
});
it('should store the triples written using a stream', function(done) {
var t1 = { subject: '车', predicate: '是', object: '交通工具' };
var t2 = { subject: '车', predicate: '是', object: '动物' };
var stream = db.putStream();
stream.write(t1);
stream.end(t2);
stream.on('close', function() {
var triples = [t1, t2];
var readStream = db.getStream({ predicate: '是' });
readStream.on('data', function(data) {
expect(data).to.eql(triples.shift());
});
readStream.on('end', done);
});
});
it('should del the triples using a stream', function(done) {
var t1 = { subject: '车', predicate: '是', object: '交通工具' };
var t2 = { subject: '车', predicate: '是', object: '动物' };
var stream = db.putStream();
stream.write(t1);
stream.end(t2);
stream.on('close', function() {
var delStream = db.delStream();
delStream.write(t1);
delStream.end(t2);
delStream.on('close', function() {
var readStream = db.getStream({ predicate: '是' });
var results = [];
readStream.on('data', function(data) {
results.push(data);
});
readStream.on('end', function() {
expect(results).to.have.property('length', 0);
done();
});
});
});
});
it('should support filtering', function(done) {
var triple1 = { subject: '车', predicate: '是', object: '动物' }
, triple2 = { subject: '车', predicate: '是', object: '交通工具' };
db.put([triple1, triple2], function() {
function filter(triple) {
return triple.object === '动物';
}
db.get({ subject: '车', predicate: '是', filter: filter }, function(err, results) {
expect(results).to.eql([triple1]);
done();
});
});
});
describe('API deprecations', function() {
var warnSpy;
beforeEach(function() {
warnSpy = sinon.stub(console, 'warn');
});
afterEach(function() {
warnSpy.restore();
});
it('should call searchStream when calling joinStream', function() {
var stub = sinon.stub(db, 'searchStream');
db.joinStream('车', '是', '交通工具');
expect(stub).to.be.calledWith('车', '是', '交通工具');
});
it('should alias search to join', function() {
var stub = sinon.stub(db, 'search');
db.join('车', '是', '交通工具');
expect(stub).to.be.calledWith('车', '是', '交通工具');
});
it('should warn when calling joinStream', function() {
var stub = sinon.stub(db, 'searchStream');
db.joinStream('车', '是', '交通工具');
expect(warnSpy).to.be.calledWith('joinStream is deprecated, use searchStream instead');
});
it('should warn when calling join', function() {
var stub = sinon.stub(db, 'search');
db.join('车', '是', '交通工具');
expect(warnSpy).to.be.calledWith('join is deprecated, use search instead');
});
});
});
describe('generateBatch', function () {
var db, leveldb = leveldb;
beforeEach(function() {
leveldb = level();
db = levelgraph(leveldb);
});
afterEach(function(done) {
db.close(done);
});
it('should generate a batch from a triple', function() {
var triple = { subject: '车', predicate: '是', object: '交通工具' };
var ops = db.generateBatch(triple);
expect(ops).to.have.property('length', 6);
ops.forEach(function (op) {
expect(op).to.have.property('type', 'put');
expect(JSON.parse(op.value)).to.eql(triple);
});
});
it('should generate a batch of type', function() {
var triple = { subject: '车', predicate: '是', object: '交通工具' };
var ops = db.generateBatch(triple, 'del');
expect(ops).to.have.property('length', 6);
ops.forEach(function (op) {
expect(op).to.have.property('type', 'del');
expect(JSON.parse(op.value)).to.eql(triple);
});
});
});