Rename ReferenceFilterSpecHelper to FilterSpecHelper

And make it more generalized for all filter specs.

spec/lib/gitlab/markdown/autolink_filter_spec.rb

@@ -2,11 +2,9 @@ require 'spec_helper'
 
 module Gitlab::Markdown
   describe AutolinkFilter do
-    let(:link) { 'http://about.gitlab.com/' }
+    include FilterSpecHelper
 
-    def filter(html, options = {})
-      described_class.call(html, options)
-    end
+    let(:link) { 'http://about.gitlab.com/' }
 
     it 'does nothing when :autolink is false' do
       exp = act = link

spec/lib/gitlab/markdown/commit_range_reference_filter_spec.rb

@@ -2,7 +2,7 @@ require 'spec_helper'
 
 module Gitlab::Markdown
   describe CommitRangeReferenceFilter do
-    include ReferenceFilterSpecHelper
+    include FilterSpecHelper
 
     let(:project) { create(:project) }
     let(:commit1) { project.commit }

spec/lib/gitlab/markdown/commit_reference_filter_spec.rb

@@ -2,7 +2,7 @@ require 'spec_helper'
 
 module Gitlab::Markdown
   describe CommitReferenceFilter do
-    include ReferenceFilterSpecHelper
+    include FilterSpecHelper
 
     let(:project) { create(:project) }
     let(:commit)  { project.commit }

spec/lib/gitlab/markdown/emoji_filter_spec.rb

@@ -2,9 +2,7 @@ require 'spec_helper'
 
 module Gitlab::Markdown
   describe EmojiFilter do
-    def filter(html, contexts = {})
-      described_class.call(html, contexts)
-    end
+    include FilterSpecHelper
 
     before do
       ActionController::Base.asset_host = 'https://foo.com'

spec/lib/gitlab/markdown/external_issue_reference_filter_spec.rb

@@ -2,7 +2,7 @@ require 'spec_helper'
 
 module Gitlab::Markdown
   describe ExternalIssueReferenceFilter do
-    include ReferenceFilterSpecHelper
+    include FilterSpecHelper
 
     def helper
       IssuesHelper

spec/lib/gitlab/markdown/external_link_filter_spec.rb

@@ -2,9 +2,7 @@ require 'spec_helper'
 
 module Gitlab::Markdown
   describe ExternalLinkFilter do
-    def filter(html, options = {})
-      described_class.call(html, options)
-    end
+    include FilterSpecHelper
 
     it 'ignores elements without an href attribute' do
       exp = act = %q(<a id="ignored">Ignore Me</a>)

spec/lib/gitlab/markdown/issue_reference_filter_spec.rb

@@ -2,7 +2,7 @@ require 'spec_helper'
 
 module Gitlab::Markdown
   describe IssueReferenceFilter do
-    include ReferenceFilterSpecHelper
+    include FilterSpecHelper
 
     def helper
       IssuesHelper

spec/lib/gitlab/markdown/label_reference_filter_spec.rb

@@ -3,7 +3,7 @@ require 'html/pipeline'
 
 module Gitlab::Markdown
   describe LabelReferenceFilter do
-    include ReferenceFilterSpecHelper
+    include FilterSpecHelper
 
     let(:project)   { create(:empty_project) }
     let(:label)     { create(:label, project: project) }

spec/lib/gitlab/markdown/merge_request_reference_filter_spec.rb

@@ -2,7 +2,7 @@ require 'spec_helper'
 
 module Gitlab::Markdown
   describe MergeRequestReferenceFilter do
-    include ReferenceFilterSpecHelper
+    include FilterSpecHelper
 
     let(:project) { create(:project) }
     let(:merge)   { create(:merge_request, source_project: project) }

spec/lib/gitlab/markdown/sanitization_filter_spec.rb

@@ -2,9 +2,7 @@ require 'spec_helper'
 
 module Gitlab::Markdown
   describe SanitizationFilter do
-    def filter(html, options = {})
-      described_class.call(html, options)
-    end
+    include FilterSpecHelper
 
     describe 'default whitelist' do
       it 'sanitizes tags that are not whitelisted' do

spec/lib/gitlab/markdown/snippet_reference_filter_spec.rb

@@ -2,7 +2,7 @@ require 'spec_helper'
 
 module Gitlab::Markdown
   describe SnippetReferenceFilter do
-    include ReferenceFilterSpecHelper
+    include FilterSpecHelper
 
     let(:project)   { create(:empty_project) }
     let(:snippet)   { create(:project_snippet, project: project) }

spec/lib/gitlab/markdown/table_of_contents_filter_spec.rb

@@ -4,9 +4,7 @@ require 'spec_helper'
 
 module Gitlab::Markdown
   describe TableOfContentsFilter do
-    def filter(html, options = {})
-      described_class.call(html, options)
-    end
+    include FilterSpecHelper
 
     def header(level, text)
       "<h#{level}>#{text}</h#{level}>\n"

spec/lib/gitlab/markdown/task_list_filter_spec.rb

@@ -2,9 +2,7 @@ require 'spec_helper'
 
 module Gitlab::Markdown
   describe TaskListFilter do
-    def filter(html, options = {})
-      described_class.call(html, options)
-    end
+    include FilterSpecHelper
 
     it 'does not apply `task-list` class to non-task lists' do
       exp = act = %(<ul><li>Item</li></ul>)

spec/lib/gitlab/markdown/user_reference_filter_spec.rb

@@ -2,7 +2,7 @@ require 'spec_helper'
 
 module Gitlab::Markdown
   describe UserReferenceFilter do
-    include ReferenceFilterSpecHelper
+    include FilterSpecHelper
 
     let(:project)   { create(:empty_project) }
     let(:user)      { create(:user) }

spec/support/reference_filter_spec_helper.rb → spec/support/filter_spec_helper.rb

-# Common methods and setup for Gitlab::Markdown reference filter specs
+# Helper methods for Gitlab::Markdown filter specs
 #
 # Must be included into specs manually
-module ReferenceFilterSpecHelper
+module FilterSpecHelper
   extend ActiveSupport::Concern
 
-  # Shortcut to Rails' auto-generated routes helpers, to avoid including the
-  # module
-  def urls
-    Rails.application.routes.url_helpers
-  end
-
-  # Modify a String reference to make it invalid
-  #
-  # Commit SHAs get reversed, IDs get incremented by 1, all other Strings get
-  # their word characters reversed.
-  #
-  # reference - String reference to modify
-  #
-  # Returns a String
-  def invalidate_reference(reference)
-    if reference =~ /\A(.+)?.\d+\z/
-      # Integer-based reference with optional project prefix
-      reference.gsub(/\d+\z/) { |i| i.to_i + 1 }
-    elsif reference =~ /\A(.+@)?(\h{6,40}\z)/
-      # SHA-based reference with optional prefix
-      reference.gsub(/\h{6,40}\z/) { |v| v.reverse }
-    else
-      reference.gsub(/\w+\z/) { |v| v.reverse }
-    end
-  end
-
   # Perform `call` on the described class
   #
-  # Automatically passes the current `project` value to the context if none is
-  # provided.
+  # Automatically passes the current `project` value, if defined, to the context
+  # if none is provided.
   #
-  # html     - String text to pass to the filter's `call` method.
+  # html     - HTML String to pass to the filter's `call` method.
   # contexts - Hash context for the filter. (default: {project: project})
   #
-  # Returns the String text returned by the filter's `call` method.
+  # Returns a Nokogiri::XML::DocumentFragment
   def filter(html, contexts = {})
-    contexts.reverse_merge!(project: project)
+    if defined?(project)
+      contexts.reverse_merge!(project: project)
+    end
+
     described_class.call(html, contexts)
   end
 
@@ -50,7 +27,7 @@ module ReferenceFilterSpecHelper
   # body     - String text to run through the pipeline
   # contexts - Hash context for the filter. (default: {project: project})
   #
-  # Returns the Hash of the pipeline result
+  # Returns the Hash
   def pipeline_result(body, contexts = {})
     contexts.reverse_merge!(project: project)
 
@@ -58,13 +35,43 @@ module ReferenceFilterSpecHelper
     pipeline.call(body)
   end
 
+  # Modify a String reference to make it invalid
+  #
+  # Commit SHAs get reversed, IDs get incremented by 1, all other Strings get
+  # their word characters reversed.
+  #
+  # reference - String reference to modify
+  #
+  # Returns a String
+  def invalidate_reference(reference)
+    if reference =~ /\A(.+)?.\d+\z/
+      # Integer-based reference with optional project prefix
+      reference.gsub(/\d+\z/) { |i| i.to_i + 1 }
+    elsif reference =~ /\A(.+@)?(\h{6,40}\z)/
+      # SHA-based reference with optional prefix
+      reference.gsub(/\h{6,40}\z/) { |v| v.reverse }
+    else
+      reference.gsub(/\w+\z/) { |v| v.reverse }
+    end
+  end
+
+  # Stub CrossProjectReference#user_can_reference_project? to return true for
+  # the current test
   def allow_cross_reference!
     allow_any_instance_of(described_class).
       to receive(:user_can_reference_project?).and_return(true)
   end
 
+  # Stub CrossProjectReference#user_can_reference_project? to return false for
+  # the current test
   def disallow_cross_reference!
     allow_any_instance_of(described_class).
       to receive(:user_can_reference_project?).and_return(false)
   end
+
+  # Shortcut to Rails' auto-generated routes helpers, to avoid including the
+  # module
+  def urls
+    Rails.application.routes.url_helpers
+  end
 end