spec/null_composite_spec.rb in compo-0.1.5 vs spec/null_composite_spec.rb in compo-0.2.0

@@ -1,67 +1,7 @@
 require 'spec_helper'
 require 'compo'
+require 'null_composite_shared_examples'
 
 describe Compo::NullComposite do
-  let(:child1) { double(:child1) }
-  let(:child2) { double(:child2) }
-  let(:child3) { double(:child3) }
-
-  describe '#add' do
-    it 'always returns nil' do
-      expect(subject.add(1, child1)).to be_nil
-      expect(subject.add(:a, child2)).to be_nil
-      expect(subject.add(nil, child3)).to be_nil
-    end
-
-    it 'does not change the result of #children' do
-      expect(subject.children).to eq({})
-
-      subject.add(1, child1)
-      expect(subject.children).to eq({})
-
-      subject.add(:a, child2)
-      expect(subject.children).to eq({})
-
-      subject.add(:a, child3)
-      expect(subject.children).to eq({})
-    end
-  end
-
-  describe '#remove' do
-    specify { expect(subject.remove(child1)).to eq(nil) }
-
-    it 'does not change the result of #children' do
-      expect(subject.children).to eq({})
-
-      subject.remove(child1)
-      expect(subject.children).to eq({})
-
-      subject.remove(child2)
-      expect(subject.children).to eq({})
-
-      subject.remove(child3)
-      expect(subject.children).to eq({})
-    end
-  end
-
-  describe '#remove_id' do
-    specify { expect(subject.remove_id(:a)).to eq(nil) }
-
-    it 'does not change the result of #children' do
-      expect(subject.children).to eq({})
-
-      subject.remove_id(0)
-      expect(subject.children).to eq({})
-
-      subject.remove_id(:a)
-      expect(subject.children).to eq({})
-
-      subject.remove_id(nil)
-      expect(subject.children).to eq({})
-    end
-  end
-
-  describe '#children' do
-    specify { expect(subject.children).to eq({}) }
-  end
+  it_behaves_like 'a null composite'
 end