Populate QA factory product with data from a page

qa/qa/factory/base.rb

@@ -13,7 +13,7 @@ module QA
       end
 
       def self.fabricate!(*args)
-        Factory::Product.populate!(new) do |factory|
+        new.tap do |factory|
           yield factory if block_given?
 
           dependencies.each do |name, signature|
@@ -21,6 +21,8 @@ module QA
           end
 
           factory.fabricate!(*args)
+
+          return Factory::Product.populate!(self)
         end
       end
 

qa/qa/factory/product.rb

@@ -7,8 +7,7 @@ module QA
 
       Attribute = Struct.new(:name, :block)
 
-      def initialize(factory)
-        @factory = factory
+      def initialize
         @location = current_url
       end
 
@@ -17,11 +16,13 @@ module QA
       end
 
       def self.populate!(factory)
-        raise ArgumentError unless block_given?
-
-        yield factory
-
-        new(factory)
+        new.tap do |product|
+          factory.attributes.each_value do |attribute|
+            product.instance_exec(&attribute.block).tap do |value|
+              product.define_singleton_method(attribute.name) { value }
+            end
+          end
+        end
       end
     end
   end

qa/spec/factory/base_spec.rb

 describe QA::Factory::Base do
+  let(:factory) { spy('factory') }
+  let(:product) { spy('product') }
+
   describe '.fabricate!' do
     subject { Class.new(described_class) }
-    let(:factory) { spy('factory') }
-    let(:product) { spy('product') }
 
     before do
       allow(QA::Factory::Product).to receive(:new).and_return(product)
@@ -89,14 +90,33 @@ describe QA::Factory::Base do
   describe '.product' do
     subject do
       Class.new(described_class) do
-        product :token do |factory, page|
-          page.do_something!
+        product :token do
+          page.do_something_on_page!
+          'resulting value'
         end
       end
     end
 
     it 'appends new product attribute' do
       expect(subject.attributes).to be_one
+      expect(subject.attributes).to have_key(:token)
+    end
+
+    describe 'populating fabrication product with data' do
+      let(:page) { spy('page') }
+
+      before do
+        allow(subject).to receive(:new).and_return(factory)
+        allow(QA::Factory::Product).to receive(:new).and_return(product)
+        allow(product).to receive(:page).and_return(page)
+      end
+
+      it 'populates product after fabrication' do
+        subject.fabricate!
+
+        expect(page).to have_received(:do_something_on_page!)
+        expect(product.token).to eq 'resulting value'
+      end
     end
   end
 end

qa/spec/factory/product_spec.rb

@@ -3,19 +3,8 @@ describe QA::Factory::Product do
   let(:product) { spy('product') }
 
   describe '.populate!' do
-    it 'instantiates and yields factory' do
-      expect(described_class).to receive(:new).with(factory)
-
-      described_class.populate!(factory) do |instance|
-        instance.something = 'string'
-      end
-
-      expect(factory).to have_received(:something=).with('string')
-    end
-
     it 'returns a fabrication product' do
-      expect(described_class).to receive(:new)
-        .with(factory).and_return(product)
+      expect(described_class).to receive(:new).and_return(product)
 
       result = described_class.populate!(factory) do |instance|
         instance.something = 'string'
@@ -23,11 +12,6 @@ describe QA::Factory::Product do
 
       expect(result).to be product
     end
-
-    it 'raises unless block given' do
-      expect { described_class.populate!(factory) }
-        .to raise_error ArgumentError
-    end
   end
 
   describe '.visit!' do
@@ -37,8 +21,7 @@ describe QA::Factory::Product do
       allow_any_instance_of(described_class)
         .to receive(:visit).and_return('visited some url')
 
-      expect(described_class.new(factory).visit!)
-        .to eq 'visited some url'
+      expect(subject.visit!).to eq 'visited some url'
     end
   end
 end