couchrest_model/spec/couchrest/assocations_spec.rb

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# encoding: utf-8
require File.expand_path('../../spec_helper', __FILE__)
require File.join(FIXTURE_PATH, 'more', 'sale_invoice')
describe "Assocations" do
describe ".merge_belongs_to_association_options" do
before :all do
def SaleInvoice.merge_assoc_opts(*args)
merge_belongs_to_association_options(*args)
end
end
it "should return a default set of options" do
o = SaleInvoice.merge_assoc_opts(:cat)
o[:foreign_key].should eql('cat_id')
o[:class_name].should eql('Cat')
o[:proxy_name].should eql('cats')
o[:proxy].should eql('Cat') # same as class name
end
it "should merge with provided options" do
o = SaleInvoice.merge_assoc_opts(:cat, :foreign_key => 'somecat_id', :proxy => 'some_cats')
o[:foreign_key].should eql('somecat_id')
o[:proxy].should eql('some_cats')
end
it "should generate a proxy string if proxied" do
SaleInvoice.stub!(:proxy_owner_method).twice.and_return('company')
o = SaleInvoice.merge_assoc_opts(:cat)
o[:proxy].should eql('self.company.cats')
end
end
describe "of type belongs to" do
before :each do
@invoice = SaleInvoice.create(:price => 2000)
@client = Client.create(:name => "Sam Lown")
end
it "should create a foreign key property with setter and getter" do
@invoice.properties.find{|p| p.name == 'client_id'}.should_not be_nil
@invoice.respond_to?(:client_id).should be_true
@invoice.respond_to?("client_id=").should be_true
end
it "should set the property and provide object when set" do
@invoice.client = @client
@invoice.client_id.should eql(@client.id)
@invoice.client.should eql(@client)
end
it "should set the attribute, save and return" do
@invoice.client = @client
@invoice.save
@invoice = SaleInvoice.get(@invoice.id)
@invoice.client.id.should eql(@client.id)
end
it "should remove the association if nil is provided" do
@invoice.client = @client
@invoice.client = nil
@invoice.client_id.should be_nil
end
it "should not try to search for association if foreign_key is nil" do
@invoice.client_id = nil
Client.should_not_receive(:get)
@invoice.client
end
it "should allow override of foreign key" do
@invoice.respond_to?(:alternate_client).should be_true
@invoice.respond_to?("alternate_client=").should be_true
@invoice.properties.find{|p| p.name == 'alt_client_id'}.should_not be_nil
end
it "should allow override of foreign key and save" do
@invoice.alternate_client = @client
@invoice.save
@invoice = SaleInvoice.get(@invoice.id)
@invoice.alternate_client.id.should eql(@client.id)
end
end
describe "of type collection_of" do
before(:each) do
@invoice = SaleInvoice.create(:price => 2000)
@entries = [
SaleEntry.create(:description => 'test line 1', :price => 500),
SaleEntry.create(:description => 'test line 2', :price => 500),
SaleEntry.create(:description => 'test line 3', :price => 1000)
]
end
it "should create an associated property and collection proxy" do
@invoice.respond_to?('entry_ids').should be_true
@invoice.respond_to?('entry_ids=').should be_true
@invoice.entries.class.should eql(::CouchRest::Model::CollectionOfProxy)
end
it "should allow replacement of objects" do
@invoice.entries = @entries
@invoice.entries.length.should eql(3)
@invoice.entry_ids.length.should eql(3)
@invoice.entries.first.should eql(@entries.first)
@invoice.entry_ids.first.should eql(@entries.first.id)
end
it "should allow ids to be set directly and load entries" do
@invoice.entry_ids = @entries.collect{|i| i.id}
@invoice.entries.length.should eql(3)
@invoice.entries.first.should eql(@entries.first)
end
it "should replace collection if ids replaced" do
@invoice.entry_ids = @entries.collect{|i| i.id}
@invoice.entries.length.should eql(3) # load once
@invoice.entry_ids = @entries[0..1].collect{|i| i.id}
@invoice.entries.length.should eql(2)
end
it "should allow forced collection update if ids changed" do
@invoice.entry_ids = @entries[0..1].collect{|i| i.id}
@invoice.entries.length.should eql(2) # load once
@invoice.entry_ids << @entries[2].id
@invoice.entry_ids.length.should eql(3)
@invoice.entries.length.should eql(2) # cached!
@invoice.entries(true).length.should eql(3)
end
it "should empty arrays when nil collection provided" do
@invoice.entries = @entries
@invoice.entries = nil
@invoice.entry_ids.should be_empty
@invoice.entries.should be_empty
end
it "should empty arrays when nil ids array provided" do
@invoice.entries = @entries
@invoice.entry_ids = nil
@invoice.entry_ids.should be_empty
@invoice.entries.should be_empty
end
it "should ignore nil entries" do
@invoice.entries = [ nil ]
@invoice.entry_ids.should be_empty
@invoice.entries.should be_empty
end
# Account for dirty tracking
describe "dirty tracking" do
it "should register changes on push" do
@invoice.changed?.should be_false
@invoice.entries << @entries[0]
@invoice.changed?.should be_true
end
it "should register changes on pop" do
@invoice.entries << @entries[0]
@invoice.save
@invoice.changed?.should be_false
@invoice.entries.pop
@invoice.changed?.should be_true
end
it "should register id changes on push" do
@invoice.entry_ids << @entries[0].id
@invoice.changed?.should be_true
end
it "should register id changes on pop" do
@invoice.entry_ids << @entries[0].id
@invoice.save
@invoice.changed?.should be_false
@invoice.entry_ids.pop
@invoice.changed?.should be_true
end
end
describe "proxy" do
it "should ensure new entries to proxy are matched" do
@invoice.entries << @entries.first
@invoice.entry_ids.first.should eql(@entries.first.id)
@invoice.entries.first.should eql(@entries.first)
@invoice.entries << @entries[1]
@invoice.entries.count.should eql(2)
@invoice.entry_ids.count.should eql(2)
@invoice.entry_ids.last.should eql(@entries[1].id)
@invoice.entries.last.should eql(@entries[1])
end
it "should support push method" do
@invoice.entries.push(@entries.first)
@invoice.entry_ids.first.should eql(@entries.first.id)
end
it "should support []= method" do
@invoice.entries[0] = @entries.first
@invoice.entry_ids.first.should eql(@entries.first.id)
end
it "should support unshift method" do
@invoice.entries.unshift(@entries.first)
@invoice.entry_ids.first.should eql(@entries.first.id)
@invoice.entries.unshift(@entries[1])
@invoice.entry_ids.first.should eql(@entries[1].id)
end
it "should support pop method" do
@invoice.entries.push(@entries.first)
@invoice.entries.pop.should eql(@entries.first)
@invoice.entries.empty?.should be_true
@invoice.entry_ids.empty?.should be_true
end
it "should support shift method" do
@invoice.entries.push(@entries[0])
@invoice.entries.push(@entries[1])
@invoice.entries.shift.should eql(@entries[0])
@invoice.entries.first.should eql(@entries[1])
@invoice.entry_ids.first.should eql(@entries[1].id)
end
it "should raise error when adding un-persisted entries" do
SaleEntry.find_by_description('test entry').should be_nil
entry = SaleEntry.new(:description => 'test entry', :price => 500)
lambda {
@invoice.entries << entry
}.should raise_error
# In the future maybe?
# @invoice.save.should be_true
# SaleEntry.find_by_description('test entry').should_not be_nil
end
end
end
end