test/twin/twin_test.rb in disposable-0.0.7 vs test/twin/twin_test.rb in disposable-0.0.8

@@ -159,6 +159,58 @@
 
   # passing both options.
   it { Song.new(song, preview?: true, highlight?: false).preview?.must_equal true }
 end
 
+
+class TwinBuilderTest < MiniTest::Spec
+  class Twin < Disposable::Twin
+    property :id
+    property :title
+    option   :is_released
+  end
+
+  describe "without property setup" do
+    class Host
+      include Disposable::Twin::Builder
+
+      twin Twin
+
+      def initialize(*args)
+        @model = build_twin(*args)
+      end
+
+      attr_reader :model
+    end
+
+    subject { Host.new(TwinTest::Model::Song.new(1, "Saturday Night"), is_released: true) }
+
+    # model is simply the twin.
+    it { subject.respond_to?(:title).must_equal false }
+    it { subject.model.id.must_equal 1 }
+    it { subject.model.title.must_equal "Saturday Night" }
+    it { subject.model.is_released.must_equal true }
+  end
+
+
+  describe "without property setup" do
+    class HostWithReaders
+      include Disposable::Twin::Builder
+
+      extend Forwardable
+      twin(Twin) { |dfn| def_delegator :@model, dfn.name }
+
+      def initialize(*args)
+        @model = build_twin(*args)
+      end
+    end
+
+    subject { HostWithReaders.new(TwinTest::Model::Song.new(1, "Saturday Night"), is_released: true) }
+
+    # both twin gets created and reader method defined.
+    it { subject.id.must_equal 1 }
+    it { subject.title.must_equal "Saturday Night" }
+    it { subject.is_released.must_equal true }
+  end
+end
+
 # TODO: test coercion!
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