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relationship_spec.rb
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relationship_spec.rb
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require File.expand_path(File.join(File.dirname(__FILE__), '..', '..', 'spec_helper'))
share_examples_for 'it creates a one accessor' do
describe 'accessor' do
describe 'when there is no associated resource' do
describe 'without a query' do
before :all do
@return = @car.send(@name)
end
it 'should return nil' do
@return.should be_nil
end
end
describe 'with a query' do
before :all do
@return = @car.send(@name, :id => 1)
end
it 'should return nil' do
@return.should be_nil
end
end
end
describe 'when there is an associated resource' do
before :all do
@expected = @model.new
@car.send("#{@name}=", @expected)
end
describe 'without a query' do
before :all do
@return = @car.send(@name)
end
it 'should return a Resource' do
@return.should be_kind_of(DataMapper::Resource)
end
it 'should return the expected Resource' do
@return.should equal(@expected)
end
end
describe 'with a query' do
before :all do
@return = @car.send(@name, :id => @expected.id)
end
it 'should return a Resource' do
@return.should be_kind_of(DataMapper::Resource)
end
it 'should return the expected Resource' do
@return.should == @expected
end
end
end
end
end
share_examples_for 'it creates a one mutator' do
describe 'mutator' do
describe 'when setting an associated resource' do
before :all do
@expected = @model.new
@return = @car.send("#{@name}=", @expected)
end
it 'should return the expected Resource' do
@return.should equal(@expected)
end
it 'should set the Resource' do
@car.send(@name).should equal(@expected)
end
it 'should relate associated Resource' do
relationship = Car.relationships[@name]
belongs_to = relationship.kind_of?(DataMapper::Associations::ManyToOne::Relationship)
has_1_through = relationship.kind_of?(DataMapper::Associations::OneToOne::Relationship) && relationship.through
pending_if 'TODO', belongs_to || has_1_through do
@expected.car.should == @car
end
end
it 'should persist the Resource' do
pending_if 'TODO', Car.relationships[@name].kind_of?(DataMapper::Associations::ManyToOne::Relationship) do
@car.save.should be_true
@car.model.get(*@car.key).send(@name).should == @expected
end
end
it 'should persist the associated Resource' do
pending_if 'TODO', Car.relationships[@name].kind_of?(DataMapper::Associations::ManyToOne::Relationship) do
@car.save.should be_true
@expected.should be_saved
@expected.model.get(*@expected.key).car.should == @car
end
end
end
describe 'when setting a nil resource' do
before :all do
@car.send("#{@name}=", @model.new)
@return = @car.send("#{@name}=", nil)
end
it 'should return nil' do
@return.should be_nil
end
it 'should set nil' do
@car.send(@name).should be_nil
end
it 'should persist as nil' do
@car.save.should be_true
@car.model.get(*@car.key).send(@name).should be_nil
end
end
describe 'when changing an associated resource' do
before :all do
@car.send("#{@name}=", @model.new)
@expected = @model.new
@return = @car.send("#{@name}=", @expected)
end
it 'should return the expected Resource' do
@return.should equal(@expected)
end
it 'should set the Resource' do
@car.send(@name).should equal(@expected)
end
it 'should relate associated Resource' do
relationship = Car.relationships[@name]
belongs_to = relationship.kind_of?(DataMapper::Associations::ManyToOne::Relationship)
has_1_through = relationship.kind_of?(DataMapper::Associations::OneToOne::Relationship) && relationship.through
pending_if 'should create back-reference', belongs_to || has_1_through do
@expected.car.should == @car
end
end
it 'should persist the Resource' do
pending_if 'TODO', Car.relationships[@name].kind_of?(DataMapper::Associations::ManyToOne::Relationship) do
@car.save.should be_true
@car.model.get(*@car.key).send(@name).should == @expected
end
end
it 'should persist the associated Resource' do
pending_if 'TODO', Car.relationships[@name].kind_of?(DataMapper::Associations::ManyToOne::Relationship) do
@car.save.should be_true
@expected.should be_saved
@expected.model.get(*@expected.key).car.should == @car
end
end
end
end
end
share_examples_for 'it creates a many accessor' do
describe 'accessor' do
describe 'when there is no child resource and the source is saved' do
before :all do
@car.save.should be_true
@return = @car.send(@name)
end
it 'should return a Collection' do
@return.should be_kind_of(DataMapper::Collection)
end
it 'should return an empty Collection' do
@return.should be_empty
end
end
describe 'when there is no child resource and the source is not saved' do
before :all do
@return = @car.send(@name)
end
it 'should return a Collection' do
@return.should be_kind_of(DataMapper::Collection)
end
it 'should return an empty Collection' do
@return.should be_empty
end
end
describe 'when there is a child resource' do
before :all do
@return = nil
@expected = @model.new
@car.send("#{@name}=", [ @expected ])
@return = @car.send(@name)
end
it 'should return a Collection' do
@return.should be_kind_of(DataMapper::Collection)
end
it 'should return expected Resources' do
@return.should == [ @expected ]
end
end
end
end
share_examples_for 'it creates a many mutator' do
describe 'mutator' do
describe 'when setting an associated collection' do
before :all do
@expected = [ @model.new ]
@return = @car.send("#{@name}=", @expected)
end
it 'should return the expected Collection' do
@return.should == @expected
end
it 'should set the Collection' do
@car.send(@name).should == @expected
@car.send(@name).zip(@expected) { |v, e| v.should equal(e) }
end
it 'should relate the associated Collection' do
pending_if 'TODO', Car.relationships[@name].kind_of?(DataMapper::Associations::ManyToMany::Relationship) do
@expected.each { |r| r.car.should == @car }
end
end
it 'should persist the Collection' do
@car.save.should be_true
@car.model.get(*@car.key).send(@name).should == @expected
end
it 'should persist the associated Resource' do
@car.save.should be_true
@expected.each { |r| r.should be_saved }
@expected.each { |r| r.model.get(*r.key).car.should == @car }
end
end
describe 'when setting an empty collection' do
before :all do
@car.send("#{@name}=", [ @model.new ])
@return = @car.send("#{@name}=", [])
end
it 'should return a Collection' do
@return.should be_kind_of(DataMapper::Collection)
end
it 'should set an empty Collection' do
@car.send(@name).should be_empty
end
it 'should persist as an empty Collection' do
@car.save.should be_true
@car.model.get(*@car.key).send(@name).should be_empty
end
end
describe 'when changing an associated collection' do
before :all do
@car.send("#{@name}=", [ @model.new ])
@car.save.should be_true
@expected = [ @model.new ]
@return = @car.send("#{@name}=", @expected)
end
it 'should return the expected Resource' do
@return.should == @expected
end
it 'should set the Resource' do
@car.send(@name).should == @expected
@car.send(@name).zip(@expected) { |v, e| v.should equal(e) }
end
it 'should relate associated Resource' do
pending_if 'TODO', Car.relationships[@name].kind_of?(DataMapper::Associations::ManyToMany::Relationship) do
@expected.each { |r| r.car.should == @car }
end
end
it 'should persist the Resource' do
@car.save.should be_true
@car.model.get(*@car.key).send(@name).should == @expected
end
it 'should persist the associated Resource' do
@car.save.should be_true
@expected.each { |r| r.should be_saved }
@expected.each { |r| r.model.get(*r.key).car.should == @car }
end
end
end
end
describe DataMapper::Associations do
before :all do
class ::Car
include DataMapper::Resource
property :id, Serial
end
class ::Engine
include DataMapper::Resource
property :id, Serial
end
class ::Door
include DataMapper::Resource
property :id, Serial
end
class ::Window
include DataMapper::Resource
property :id, Serial
end
end
def n
1.0/0
end
it { Car.should respond_to(:has) }
describe '#has' do
describe '1' do
before :all do
@model = Engine
@name = :engine
Car.has(1, @name)
Engine.belongs_to(:car)
end
supported_by :all do
before :all do
@car = Car.new
end
it { @car.should respond_to(@name) }
it_should_behave_like 'it creates a one accessor'
it { @car.should respond_to("#{@name}=") }
it_should_behave_like 'it creates a one mutator'
end
end
describe '1 through' do
before :all do
@model = Engine
@name = :engine
Car.has(1, @name, :through => DataMapper::Resource)
Engine.has(1, :car, :through => DataMapper::Resource)
end
supported_by :all do
before :all do
@no_join = defined?(DataMapper::Adapters::InMemoryAdapter) && @adapter.kind_of?(DataMapper::Adapters::InMemoryAdapter) ||
defined?(DataMapper::Adapters::YamlAdapter) && @adapter.kind_of?(DataMapper::Adapters::YamlAdapter)
end
before :all do
@car = Car.new
end
before do
pending if @no_join
end
it { @car.should respond_to(@name) }
it_should_behave_like 'it creates a one accessor'
it { @car.should respond_to("#{@name}=") }
it_should_behave_like 'it creates a one mutator'
end
end
describe 'n..n' do
before :all do
@model = Door
@name = :doors
Car.has(1..4, @name)
Door.belongs_to(:car, :nullable => true)
end
supported_by :all do
before :all do
@car = Car.new
end
it { @car.should respond_to(@name) }
it_should_behave_like 'it creates a many accessor'
it { @car.should respond_to("#{@name}=") }
it_should_behave_like 'it creates a many mutator'
end
end
describe 'n..n through' do
before :all do
@model = Window
@name = :windows
Window.has(1, :car, :through => DataMapper::Resource)
Car.has(1..4, :windows, :through => DataMapper::Resource)
end
supported_by :all do
before :all do
@no_join = defined?(DataMapper::Adapters::InMemoryAdapter) && @adapter.kind_of?(DataMapper::Adapters::InMemoryAdapter) ||
defined?(DataMapper::Adapters::YamlAdapter) && @adapter.kind_of?(DataMapper::Adapters::YamlAdapter)
end
before :all do
@car = Car.new
end
before do
pending if @no_join
end
it { @car.should respond_to(@name) }
it_should_behave_like 'it creates a many accessor'
it { @car.should respond_to("#{@name}=") }
it_should_behave_like 'it creates a many mutator'
end
end
it 'should raise an exception if the cardinality is not understood' do
lambda { Car.has(n..n, :doors) }.should raise_error(ArgumentError)
end
it 'should raise an exception if the minimum constraint is larger than the maximum' do
lambda { Car.has(2..1, :doors) }.should raise_error(ArgumentError)
end
end
it { Engine.should respond_to(:belongs_to) }
describe '#belongs_to' do
before :all do
@model = Engine
@name = :engine
Car.belongs_to(@name, :nullable => true)
Engine.has(1, :car)
end
supported_by :all do
before :all do
@car = Car.new
end
it { @car.should respond_to(@name) }
it_should_behave_like 'it creates a one accessor'
it { @car.should respond_to("#{@name}=") }
it_should_behave_like 'it creates a one mutator'
end
# TODO: refactor these specs into above structure once they pass
describe 'pending query specs' do
before :all do
Car.has(1, :engine)
Engine.belongs_to(:car)
end
supported_by :all do
describe 'querying for a parent resource when only the foreign key is set' do
before :all do
# create a car that would be returned if the query is not
# scoped properly to retrieve @car
Car.create
@car = Car.create
engine = Engine.new(:car_id => @car.id)
@return = engine.car
end
it 'should return a Resource' do
@return.should be_kind_of(DataMapper::Resource)
end
it 'should return expected Resource' do
@return.should eql(@car)
end
end
describe 'querying for a parent resource' do
before :all do
@car = Car.create
@engine = Engine.create(:car => @car)
@resource = @engine.car(:id => @car.id)
end
it 'should return a Resource' do
@resource.should be_kind_of(DataMapper::Resource)
end
it 'should return expected Resource' do
@resource.should eql(@car)
end
end
describe 'querying for a parent resource that does not exist' do
before :all do
@car = Car.create
@engine = Engine.create(:car => @car)
@resource = @engine.car(:id.not => @car.id)
end
it 'should return nil' do
@resource.should be_nil
end
end
describe 'changing the parent resource' do
before :all do
@car = Car.create
@engine = Engine.new
@engine.car = @car
end
it 'should set the associated foreign key' do
@engine.car_id.should == @car.id
end
it 'should add the engine object to the car' do
pending 'Changing a belongs_to parent should add the object to the correct association' do
@car.engines.should be_include(@engine)
end
end
end
describe 'changing the parent foreign key' do
before :all do
@car = Car.create
@engine = Engine.new
@engine.car_id = @car.id
end
it 'should set the associated resource' do
@engine.car.should eql(@car)
end
end
describe 'changing an existing resource through the relation' do
before :all do
@car1 = Car.create
@car2 = Car.create
@engine = Engine.create(:car => @car1)
@engine.car = @car2
end
it 'should also change the foreign key' do
@engine.car_id.should == @car2.id
end
it 'should add the engine to the car' do
pending 'Changing a belongs_to parent should add the object to the correct association' do
@car2.engines.should be_include(@engine)
end
end
end
describe 'changing an existing resource through the relation' do
before :all do
@car1 = Car.create
@car2 = Car.create
@engine = Engine.create(:car => @car1)
@engine.car_id = @car2.id
end
it 'should also change the foreign key' do
pending 'a change to the foreign key should also change the related object' do
@engine.car.should eql(@car2)
end
end
it 'should add the engine to the car' do
pending 'a change to the foreign key should also change the related object' do
@car2.engines.should be_include(@engine)
end
end
end
end
end
end
end