Add support for defining explicit dependencies to QA factories

qa/qa.rb

@@ -17,6 +17,8 @@ module QA
   #
   module Factory
     autoload :Base, 'qa/factory/base'
+    autoload :Dependency, 'qa/factory/dependency'
+    autoload :Product, 'qa/factory/product'
 
     module Resource
       autoload :Sandbox, 'qa/factory/resource/sandbox'

qa/qa/factory/base.rb

@@ -1,15 +1,34 @@
 module QA
   module Factory
     class Base
+      def fabricate!(*_args)
+        raise NotImplementedError
+      end
+
       def self.fabricate!(*args)
-        new.tap do |factory|
+        Factory::Product.populate!(new) do |factory|
           yield factory if block_given?
-          return factory.fabricate!(*args)
+
+          dependencies.each do |name, signature|
+            Factory::Dependency.new(name, factory, signature).build!
+          end
+
+          factory.fabricate!(*args)
         end
       end
 
-      def fabricate!(*_args)
-        raise NotImplementedError
+      def self.dependencies
+        @dependencies ||= {}
+      end
+
+      def self.dependency(factory, as:, &block)
+        as.tap do |name|
+          class_eval { attr_accessor name }
+
+          Dependency::Signature.new(factory, block).tap do |signature|
+            dependencies.store(name, signature)
+          end
+        end
       end
     end
   end

qa/qa/factory/dependency.rb

@@ -0,0 +1,38 @@
+module QA
+  module Factory
+    class Dependency
+      Signature = Struct.new(:factory, :block)
+
+      def initialize(name, factory, signature)
+        @name = name
+        @factory = factory
+        @signature = signature
+      end
+
+      def overridden?
+        !!@factory.public_send(@name)
+      end
+
+      def build!
+        return if overridden?
+
+        Builder.new(@signature).fabricate!.tap do |product|
+          @factory.public_send("#{@name}=", product)
+        end
+      end
+
+      class Builder
+        def initialize(signature)
+          @factory = signature.factory
+          @block = signature.block
+        end
+
+        def fabricate!
+          @factory.fabricate! do |factory|
+            @block&.call(factory)
+          end
+        end
+      end
+    end
+  end
+end

qa/qa/factory/product.rb

@@ -0,0 +1,26 @@
+require 'capybara/dsl'
+
+module QA
+  module Factory
+    class Product
+      include Capybara::DSL
+
+      def initialize(factory)
+        @factory = factory
+        @location = current_url
+      end
+
+      def visit!
+        visit @location
+      end
+
+      def self.populate!(factory)
+        raise ArgumentError unless block_given?
+
+        yield factory
+
+        new(factory)
+      end
+    end
+  end
+end

qa/qa/factory/repository/push.rb

@@ -1,16 +1,13 @@
-require "pry-byebug"
-
 module QA
   module Factory
     module Repository
       class Push < Factory::Base
-        PAGE_REGEX_CHECK =
-          %r{\/#{Runtime::Namespace.sandbox_name}\/qa-test[^\/]+\/{1}[^\/]+\z}.freeze
+        attr_writer :file_name, :file_content, :commit_message, :branch_name
 
-        attr_writer :file_name,
-                    :file_content,
-                    :commit_message,
-                    :branch_name
+        dependency Factory::Resource::Project, as: :project do |project|
+          project.name = 'project-with-code'
+          project.description = 'Project with repository'
+        end
 
         def initialize
           @file_name = 'file.txt'
@@ -20,12 +17,10 @@ module QA
         end
 
         def fabricate!
+          project.visit!
+
           Git::Repository.perform do |repository|
             repository.location = Page::Project::Show.act do
-              unless PAGE_REGEX_CHECK.match(current_path)
-                raise "To perform this scenario the current page should be project show."
-              end
-
               choose_repository_clone_http
               repository_location
             end

qa/qa/factory/resource/group.rb

@@ -4,17 +4,29 @@ module QA
       class Group < Factory::Base
         attr_writer :path, :description
 
+        dependency Factory::Resource::Sandbox, as: :sandbox
+
         def initialize
           @path = Runtime::Namespace.name
           @description = "QA test run at #{Runtime::Namespace.time}"
         end
 
         def fabricate!
-          Page::Group::New.perform do |group|
-            group.set_path(@path)
-            group.set_description(@description)
-            group.set_visibility('Private')
-            group.create
+          sandbox.visit!
+
+          Page::Group::Show.perform do |page|
+            if page.has_subgroup?(@path)
+              page.go_to_subgroup(@path)
+            else
+              page.go_to_new_subgroup
+
+              Page::Group::New.perform do |group|
+                group.set_path(@path)
+                group.set_description(@description)
+                group.set_visibility('Private')
+                group.create
+              end
+            end
           end
         end
       end

qa/qa/factory/resource/project.rb

@@ -6,26 +6,17 @@ module QA
       class Project < Factory::Base
         attr_writer :description
 
+        dependency Factory::Resource::Group, as: :group
+
         def name=(name)
           @name = "#{name}-#{SecureRandom.hex(8)}"
+          @description = 'My awesome project'
         end
 
         def fabricate!
-          Factory::Resource::Sandbox.fabricate!
+          group.visit!
 
-          Page::Group::Show.perform do |page|
-            if page.has_subgroup?(Runtime::Namespace.name)
-              page.go_to_subgroup(Runtime::Namespace.name)
-            else
-              page.go_to_new_subgroup
-
-              Factory::Resource::Group.fabricate! do |group|
-                group.path = Runtime::Namespace.name
-              end
-            end
-
-            page.go_to_new_project
-          end
+          Page::Group::Show.act { go_to_new_project }
 
           Page::Project::New.perform do |page|
             page.choose_test_namespace

qa/qa/factory/resource/sandbox.rb

@@ -6,18 +6,24 @@ module QA
       # creating it if it doesn't yet exist.
       #
       class Sandbox < Factory::Base
+        def initialize
+          @name = Runtime::Namespace.sandbox_name
+        end
+
         def fabricate!
           Page::Main::Menu.act { go_to_groups }
 
           Page::Dashboard::Groups.perform do |page|
-            if page.has_group?(Runtime::Namespace.sandbox_name)
-              page.go_to_group(Runtime::Namespace.sandbox_name)
+            if page.has_group?(@name)
+              page.go_to_group(@name)
             else
               page.go_to_new_group
 
-              Resource::Group.fabricate! do |group|
-                group.path = Runtime::Namespace.sandbox_name
-                group.description = 'GitLab QA Sandbox'
+              Page::Group::New.perform do |group|
+                group.set_path(@name)
+                group.set_description('GitLab QA Sandbox')
+                group.set_visibility('Private')
+                group.create
               end
             end
           end

qa/qa/page/group/show.rb

@@ -21,6 +21,7 @@ module QA
             find('.dropdown-toggle').click
             find("li[data-value='new-subgroup']").click
           end
+
           find("input[data-action='new-subgroup']").click
         end
 
@@ -29,6 +30,7 @@ module QA
             find('.dropdown-toggle').click
             find("li[data-value='new-project']").click
           end
+
           find("input[data-action='new-project']").click
         end
       end

qa/qa/specs/features/repository/push_spec.rb

@@ -5,15 +5,10 @@ module QA
         Runtime::Browser.visit(:gitlab, Page::Main::Login)
         Page::Main::Login.act { sign_in_using_credentials }
 
-        Factory::Resource::Project.fabricate! do |scenario|
-          scenario.name = 'project_with_code'
-          scenario.description = 'project with repository'
-        end
-
-        Factory::Repository::Push.fabricate! do |scenario|
-          scenario.file_name = 'README.md'
-          scenario.file_content = '# This is test project'
-          scenario.commit_message = 'Add README.md'
+        Factory::Repository::Push.fabricate! do |push|
+          push.file_name = 'README.md'
+          push.file_content = '# This is a test project'
+          push.commit_message = 'Add README.md'
         end
 
         Page::Project::Show.act do
@@ -22,7 +17,7 @@ module QA
         end
 
         expect(page).to have_content('README.md')
-        expect(page).to have_content('This is test project')
+        expect(page).to have_content('This is a test project')
       end
     end
   end

qa/spec/factory/base_spec.rb

@@ -0,0 +1,88 @@
+describe QA::Factory::Base do
+  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)
+    end
+
+    it 'instantiates the factory and calls factory method' do
+      expect(subject).to receive(:new).and_return(factory)
+
+      subject.fabricate!('something')
+
+      expect(factory).to have_received(:fabricate!).with('something')
+    end
+
+    it 'returns fabrication product' do
+      allow(subject).to receive(:new).and_return(factory)
+      allow(factory).to receive(:fabricate!).and_return('something')
+
+      result = subject.fabricate!('something')
+
+      expect(result).to eq product
+    end
+
+    it 'yields factory before calling factory method' do
+      allow(subject).to receive(:new).and_return(factory)
+
+      subject.fabricate! do |factory|
+        factory.something!
+      end
+
+      expect(factory).to have_received(:something!).ordered
+      expect(factory).to have_received(:fabricate!).ordered
+    end
+  end
+
+  describe '.dependency' do
+    let(:dependency) { spy('dependency') }
+
+    before do
+      stub_const('Some::MyDependency', dependency)
+    end
+
+    subject do
+      Class.new(described_class) do
+        dependency Some::MyDependency, as: :mydep do |factory|
+          factory.something!
+        end
+      end
+    end
+
+    it 'appends a new dependency and accessors' do
+      expect(subject.dependencies).to be_one
+    end
+
+    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') }
+
+    subject do
+      Class.new(described_class) do
+        dependency Some::MyDependency, as: :mydep
+      end
+    end
+
+    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
+
+    it 'builds all dependencies first' do
+      expect(dependency).to receive(:fabricate!).once
+
+      subject.fabricate!
+    end
+  end
+end

qa/spec/factory/dependency_spec.rb

@@ -0,0 +1,59 @@
+describe QA::Factory::Dependency do
+  let(:dependency) { spy('dependency' ) }
+  let(:factory) { spy('factory') }
+  let(:block) { spy('block') }
+
+  let(:signature) do
+    double('signature', factory: dependency, block: block)
+  end
+
+  subject do
+    described_class.new(:mydep, factory, signature)
+  end
+
+  describe '#overridden?' do
+    it 'returns true if factory has overridden dependency' do
+      allow(factory).to receive(:mydep).and_return('something')
+
+      expect(subject).to be_overridden
+    end
+
+    it 'returns false if dependency has not been overridden' do
+      allow(factory).to receive(:mydep).and_return(nil)
+
+      expect(subject).not_to be_overridden
+    end
+  end
+
+  describe '#build!' do
+    context 'when dependency has been overridden' do
+      before do
+        allow(subject).to receive(:overridden?).and_return(true)
+      end
+
+      it 'does not fabricate dependency' do
+        subject.build!
+
+        expect(dependency).not_to have_received(:fabricate!)
+      end
+    end
+
+    context 'when dependency has not been overridden' do
+      before do
+        allow(subject).to receive(:overridden?).and_return(false)
+      end
+
+      it 'fabricates dependency' do
+        subject.build!
+
+        expect(dependency).to have_received(:fabricate!)
+      end
+
+      it 'sets product in the factory' do
+        subject.build!
+
+        expect(factory).to have_received(:mydep=).with(dependency)
+      end
+    end
+  end
+end

qa/spec/factory/product_spec.rb

@@ -0,0 +1,44 @@
+describe QA::Factory::Product do
+  let(:factory) { spy('factory') }
+  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)
+
+      result = described_class.populate!(factory) do |instance|
+        instance.something = 'string'
+      end
+
+      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
+    it 'makes it possible to visit fabrication product' do
+      allow_any_instance_of(described_class)
+        .to receive(:current_url).and_return('some url')
+      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'
+    end
+  end
+end