Make it possible to define QA factory product attributes

qa/qa/factory/base.rb

@@ -6,6 +6,7 @@ module QA
       extend SingleForwardable
 
       def_delegators :evaluator, :dependency, :dependencies
+      def_delegators :evaluator, :product, :attributes
 
       def fabricate!(*_args)
         raise NotImplementedError
@@ -28,11 +29,12 @@ module QA
       end
 
       class DSL
-        attr_reader :dependencies
+        attr_reader :dependencies, :attributes
 
         def initialize(base)
           @base = base
           @dependencies = {}
+          @attributes = {}
         end
 
         def dependency(factory, as:, &block)
@@ -40,10 +42,16 @@ module QA
             @base.class_eval { attr_accessor name }
 
             Dependency::Signature.new(factory, block).tap do |signature|
-              dependencies.store(name, signature)
+              @dependencies.store(name, signature)
             end
           end
         end
+
+        def product(attribute, &block)
+          Product::Attribute.new(attribute, block).tap do |signature|
+            @attributes.store(attribute, signature)
+          end
+        end
       end
     end
   end

qa/qa/factory/product.rb

@@ -5,6 +5,8 @@ module QA
     class Product
       include Capybara::DSL
 
+      Attribute = Struct.new(:name, :block)
+
       def initialize(factory)
         @factory = factory
         @location = current_url

qa/spec/factory/base_spec.rb

@@ -59,30 +59,44 @@ describe QA::Factory::Base do
     it 'defines dependency accessors' do
       expect(subject.new).to respond_to :mydep, :mydep=
     end
-  end
 
-  describe 'building dependencies' do
-    let(:dependency) { double('dependency') }
-    let(:instance) { spy('instance') }
+    describe 'dependencies fabrication' do
+      let(:dependency) { double('dependency') }
+      let(:instance) { spy('instance') }
 
-    subject do
-      Class.new(described_class) do
-        dependency Some::MyDependency, as: :mydep
+      subject do
+        Class.new(described_class) do
+          dependency Some::MyDependency, as: :mydep
+        end
       end
-    end
 
-    before do
-      stub_const('Some::MyDependency', dependency)
+      before do
+        stub_const('Some::MyDependency', dependency)
+
+        allow(subject).to receive(:new).and_return(instance)
+        allow(instance).to receive(:mydep).and_return(nil)
+        allow(QA::Factory::Product).to receive(:new)
+      end
 
-      allow(subject).to receive(:new).and_return(instance)
-      allow(instance).to receive(:mydep).and_return(nil)
-      allow(QA::Factory::Product).to receive(:new)
+      it 'builds all dependencies first' do
+        expect(dependency).to receive(:fabricate!).once
+
+        subject.fabricate!
+      end
     end
+  end
 
-    it 'builds all dependencies first' do
-      expect(dependency).to receive(:fabricate!).once
+  describe '.product' do
+    subject do
+      Class.new(described_class) do
+        product :token do |factory, page|
+          page.do_something!
+        end
+      end
+    end
 
-      subject.fabricate!
+    it 'appends new product attribute' do
+      expect(subject.attributes).to be_one
     end
   end
 end