Created
July 13, 2015 12:11
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| module IdentifiedCollection | |
| module ClassMethods | |
| attr_reader :objects | |
| def identify_by(identity) | |
| @objects = Hash.new | |
| @identity = identity | |
| end | |
| def identity | |
| @identity | |
| end | |
| def clean | |
| @objects = Hash.new | |
| end | |
| end | |
| module InstanceMethods | |
| def initialize(*) | |
| self.class.objects[identity] = self | |
| end | |
| def identity | |
| send(self.class.identity) | |
| end | |
| end | |
| def self.included(receiver) | |
| receiver.extend ClassMethods | |
| receiver.send :include, InstanceMethods | |
| end | |
| end |
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| describe IdentifiedCollection do | |
| class Dummy | |
| include IdentifiedCollection | |
| identify_by :name | |
| attr_reader :name | |
| def initialize(name) | |
| @name = name | |
| super | |
| end | |
| end | |
| before { Dummy.clean } | |
| context 'Class Methods' do | |
| subject { Dummy } | |
| context '#objects' do | |
| it 'is Hash' do | |
| expect(subject.objects).to be_a(Hash) | |
| end | |
| it 'has not objects by default' do | |
| expect(subject.objects).to eq({}) | |
| end | |
| end | |
| context '#identity' do | |
| it 'stores identity method name' do | |
| expect(subject.identity).to eq(:name) | |
| end | |
| end | |
| context '#clean' do | |
| it 'cleans objects collection' do | |
| obj = subject.new('john') | |
| expect(subject.objects.size).to eq(1) | |
| subject.clean | |
| expect(subject.objects.size).to eq(0) | |
| end | |
| end | |
| end | |
| context 'Instance Methods' do | |
| let(:name) { 'john doe' } | |
| subject { Dummy.new(name) } | |
| context '#identity' do | |
| it 'returns object identity' do | |
| expect(subject.identity).to eq(name) | |
| end | |
| end | |
| end | |
| context 'Integration' do | |
| let!(:u1) { Dummy.new('john') } | |
| let!(:u2) { Dummy.new('john') } | |
| let!(:u3) { Dummy.new('doe') } | |
| it 'adds two objects' do | |
| expect(Dummy.objects.size).to eq(2) | |
| expect(Dummy.objects).to include('john') | |
| expect(Dummy.objects).to include('doe') | |
| end | |
| it 'adds the last one' do | |
| expect(Dummy.objects['john']).to be(u2) | |
| expect(Dummy.objects['john']).not_to be(u1) | |
| end | |
| end | |
| end |
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