Move MarkdownFeature to its own support file

This file's about to get much bigger and this removes some of the extra
noise.

spec/features/markdown_spec.rb

@@ -346,118 +346,3 @@ describe 'GitLab Markdown', feature: true do
     :white
   end
 end
-
-# This is a helper class used by the GitLab Markdown feature spec
-#
-# Because the feature spec only cares about the output of the Markdown, and the
-# test setup and teardown and parsing is fairly expensive, we only want to do it
-# once. Unfortunately RSpec will not let you access `let`s in a `before(:all)`
-# block, so we fake it by encapsulating all the shared setup in this class.
-#
-# The class renders `spec/fixtures/markdown.md.erb` using ERB, allowing for
-# reference to the factory-created objects.
-class MarkdownFeature
-  include FactoryGirl::Syntax::Methods
-
-  def initialize
-    DatabaseCleaner.start
-  end
-
-  def teardown
-    DatabaseCleaner.clean
-  end
-
-  def user
-    @user ||= create(:user)
-  end
-
-  def group
-    unless @group
-      @group = create(:group)
-      @group.add_user(user, Gitlab::Access::DEVELOPER)
-    end
-
-    @group
-  end
-
-  # Direct references ----------------------------------------------------------
-
-  def project
-    @project ||= create(:project)
-  end
-
-  def issue
-    @issue ||= create(:issue, project: project)
-  end
-
-  def merge_request
-    @merge_request ||= create(:merge_request, :simple, source_project: project)
-  end
-
-  def snippet
-    @snippet ||= create(:project_snippet, project: project)
-  end
-
-  def commit
-    @commit ||= project.commit
-  end
-
-  def commit_range
-    unless @commit_range
-      commit2 = project.commit('HEAD~3')
-      @commit_range = CommitRange.new("#{commit.id}...#{commit2.id}", project)
-    end
-
-    @commit_range
-  end
-
-  def simple_label
-    @simple_label ||= create(:label, name: 'gfm', project: project)
-  end
-
-  def label
-    @label ||= create(:label, name: 'awaiting feedback', project: project)
-  end
-
-  # Cross-references -----------------------------------------------------------
-
-  def xproject
-    unless @xproject
-      namespace = create(:namespace, name: 'cross-reference')
-      @xproject = create(:project, namespace: namespace)
-      @xproject.team << [user, :developer]
-    end
-
-    @xproject
-  end
-
-  def xissue
-    @xissue ||= create(:issue, project: xproject)
-  end
-
-  def xmerge_request
-    @xmerge_request ||= create(:merge_request, :simple, source_project: xproject)
-  end
-
-  def xsnippet
-    @xsnippet ||= create(:project_snippet, project: xproject)
-  end
-
-  def xcommit
-    @xcommit ||= xproject.commit
-  end
-
-  def xcommit_range
-    unless @xcommit_range
-      xcommit2 = xproject.commit('HEAD~2')
-      @xcommit_range = CommitRange.new("#{xcommit.id}...#{xcommit2.id}", xproject)
-    end
-
-    @xcommit_range
-  end
-
-  def raw_markdown
-    fixture = Rails.root.join('spec/fixtures/markdown.md.erb')
-    ERB.new(File.read(fixture)).result(binding)
-  end
-end

spec/support/markdown_feature.rb

+# This is a helper class used by the GitLab Markdown feature spec
+#
+# Because the feature spec only cares about the output of the Markdown, and the
+# test setup and teardown and parsing is fairly expensive, we only want to do it
+# once. Unfortunately RSpec will not let you access `let`s in a `before(:all)`
+# block, so we fake it by encapsulating all the shared setup in this class.
+#
+# The class renders `spec/fixtures/markdown.md.erb` using ERB, allowing for
+# reference to the factory-created objects.
+class MarkdownFeature
+  include FactoryGirl::Syntax::Methods
+
+  def initialize
+    DatabaseCleaner.start
+  end
+
+  def teardown
+    DatabaseCleaner.clean
+  end
+
+  def user
+    @user ||= create(:user)
+  end
+
+  def group
+    unless @group
+      @group = create(:group)
+      @group.add_user(user, Gitlab::Access::DEVELOPER)
+    end
+
+    @group
+  end
+
+  # Direct references ----------------------------------------------------------
+
+  def project
+    @project ||= create(:project)
+  end
+
+  def issue
+    @issue ||= create(:issue, project: project)
+  end
+
+  def merge_request
+    @merge_request ||= create(:merge_request, :simple, source_project: project)
+  end
+
+  def snippet
+    @snippet ||= create(:project_snippet, project: project)
+  end
+
+  def commit
+    @commit ||= project.commit
+  end
+
+  def commit_range
+    unless @commit_range
+      commit2 = project.commit('HEAD~3')
+      @commit_range = CommitRange.new("#{commit.id}...#{commit2.id}", project)
+    end
+
+    @commit_range
+  end
+
+  def simple_label
+    @simple_label ||= create(:label, name: 'gfm', project: project)
+  end
+
+  def label
+    @label ||= create(:label, name: 'awaiting feedback', project: project)
+  end
+
+  # Cross-references -----------------------------------------------------------
+
+  def xproject
+    unless @xproject
+      namespace = create(:namespace, name: 'cross-reference')
+      @xproject = create(:project, namespace: namespace)
+      @xproject.team << [user, :developer]
+    end
+
+    @xproject
+  end
+
+  def xissue
+    @xissue ||= create(:issue, project: xproject)
+  end
+
+  def xmerge_request
+    @xmerge_request ||= create(:merge_request, :simple, source_project: xproject)
+  end
+
+  def xsnippet
+    @xsnippet ||= create(:project_snippet, project: xproject)
+  end
+
+  def xcommit
+    @xcommit ||= xproject.commit
+  end
+
+  def xcommit_range
+    unless @xcommit_range
+      xcommit2 = xproject.commit('HEAD~2')
+      @xcommit_range = CommitRange.new("#{xcommit.id}...#{xcommit2.id}", xproject)
+    end
+
+    @xcommit_range
+  end
+
+  def raw_markdown
+    fixture = Rails.root.join('spec/fixtures/markdown.md.erb')
+    ERB.new(File.read(fixture)).result(binding)
+  end
+end