Merge pull request #1355 from tsigo/gfm_spec_cleanup

GFM spec redesign

6 files changed, 337 insertions, 241 deletions

diff --git a/app/decorators/commit_decorator.rb b/app/decorators/commit_decorator.rb
index cc8fa97587b..074176ae802 100644
--- a/app/decorators/commit_decorator.rb
+++ b/app/decorators/commit_decorator.rb
@@ -1,6 +1,15 @@
 class CommitDecorator < ApplicationDecorator
   decorates :commit
 
+  # Returns a string describing the commit for use in a link title
+  #
+  # Example
+  #
+  #   "Commit: Alex Denisov - Project git clone panel"
+  def link_title
+    "Commit: #{author_name} - #{title}"
+  end
+
   # Returns the commits title.
   #
   # Usually, the commit title is the first line of the commit message.
diff --git a/app/models/commit.rb b/app/models/commit.rb
index 5c6b4d88d96..15afedcb101 100644
--- a/app/models/commit.rb
+++ b/app/models/commit.rb
@@ -1,6 +1,7 @@
 class Commit
   include ActiveModel::Conversion
   include Gitlab::Encode
+  include StaticModel
   extend ActiveModel::Naming
 
   attr_accessor :commit
@@ -22,8 +23,7 @@ class Commit
     :to_patch,
     to: :commit
 
-
-  class << self 
+  class << self
     def find_or_first(repo, commit_id = nil, root_ref)
       commit = if commit_id
                  repo.commit(commit_id)
@@ -85,7 +85,7 @@ class Commit
       first = project.commit(to.try(:strip))
       last = project.commit(from.try(:strip))
 
-      result = { 
+      result = {
         commits: [],
         diffs: [],
         commit: nil
@@ -105,10 +105,6 @@ class Commit
     end
   end
 
-  def persisted?
-    false
-  end
-
   def initialize(raw_commit, head = nil)
     @commit = raw_commit
     @head = head
@@ -155,7 +151,7 @@ class Commit
     prev_commit.try :id
   end
 
-  def parents_count 
+  def parents_count
     parents && parents.count || 0
   end
 end
diff --git a/app/roles/static_model.rb b/app/roles/static_model.rb
new file mode 100644
index 00000000000..d26c8f47501
--- /dev/null
+++ b/app/roles/static_model.rb
@@ -0,0 +1,35 @@
+# Provides an ActiveRecord-like interface to a model whose data is not persisted to a database.
+module StaticModel
+  extend ActiveSupport::Concern
+
+  module ClassMethods
+    # Used by ActiveRecord's polymorphic association to set object_id
+    def primary_key
+      'id'
+    end
+
+    # Used by ActiveRecord's polymorphic association to set object_type
+    def base_class
+      self
+    end
+  end
+
+  # Used by AR for fetching attributes
+  #
+  # Pass it along if we respond to it.
+  def [](key)
+    send(key) if respond_to?(key)
+  end
+
+  def to_param
+    id
+  end
+
+  def persisted?
+    false
+  end
+
+  def destroyed?
+    false
+  end
+end
diff --git a/lib/gitlab/markdown.rb b/lib/gitlab/markdown.rb
index 75fa835d502..9a07133d0b3 100644
--- a/lib/gitlab/markdown.rb
+++ b/lib/gitlab/markdown.rb
@@ -100,7 +100,7 @@ module Gitlab
 
     def reference_commit(identifier)
       if commit = @project.commit(identifier)
-        link_to(identifier, project_commit_path(@project, id: commit.id), html_options.merge(title: "Commit: #{commit.author_name} - #{CommitDecorator.new(commit).title}", class: "gfm gfm-commit #{html_options[:class]}"))
+        link_to(identifier, project_commit_path(@project, id: commit.id), html_options.merge(title: CommitDecorator.new(commit).link_title, class: "gfm gfm-commit #{html_options[:class]}"))
       end
     end
   end
diff --git a/spec/helpers/gitlab_flavored_markdown_spec.rb b/spec/helpers/gitlab_flavored_markdown_spec.rb
deleted file mode 100644
index 28bd46ecb99..00000000000
--- a/spec/helpers/gitlab_flavored_markdown_spec.rb
+++ /dev/null
@@ -1,232 +0,0 @@
-require "spec_helper"
-
-describe GitlabMarkdownHelper do
-  before do
-    @project = Factory(:project)
-    @commit = @project.repo.commits.first.parents.first
-    @commit = CommitDecorator.decorate(Commit.new(@commit))
-    @other_project = Factory :project, path: "OtherPath", code: "OtherCode"
-    @fake_user = Factory :user, name: "fred"
-  end
-
-  describe "#gfm" do
-    it "should return text if @project is not set" do
-      @project = nil
-
-      gfm("foo").should == "foo"
-    end
-
-    describe "referencing a commit" do
-      it "should link using a full id" do
-        gfm("Reverts changes from #{@commit.id}").should == "Reverts changes from #{link_to @commit.id, project_commit_path(@project, id: @commit.id), title: "Commit: #{@commit.author_name} - #{@commit.title}", class: "gfm gfm-commit "}"
-      end
-
-      it "should link using a short id" do
-        gfm("Backported from #{@commit.id[0, 6]}").should == "Backported from #{link_to @commit.id[0, 6], project_commit_path(@project, id: @commit.id), title: "Commit: #{@commit.author_name} - #{@commit.title}", class: "gfm gfm-commit "}"
-      end
-
-      it "should link with adjecent text" do
-        gfm("Reverted (see #{@commit.id})").should == "Reverted (see #{link_to @commit.id, project_commit_path(@project, id: @commit.id), title: "Commit: #{@commit.author_name} - #{@commit.title}", class: "gfm gfm-commit "})"
-      end
-
-      it "should not link with an invalid id" do
-        gfm("What happened in 12345678?").should == "What happened in 12345678?"
-      end
-    end
-
-    describe "referencing a team member" do
-      it "should link using a simple name" do
-        user = Factory :user, name: "barry"
-        @project.users << user
-        member = @project.users_projects.where(user_id: user).first
-
-        gfm("@#{user.name} you are right").should == "#{link_to "@#{user.name}", project_team_member_path(@project, member), class: "gfm gfm-team_member "} you are right"
-      end
-
-      it "should link using a name with dots" do
-        user = Factory :user, name: "alphA.Beta"
-        @project.users << user
-        member = @project.users_projects.where(user_id: user).first
-
-        gfm("@#{user.name} you are right").should == "#{link_to "@#{user.name}", project_team_member_path(@project, member), class: "gfm gfm-team_member "} you are right"
-      end
-
-      it "should link using name with underscores" do
-        user = Factory :user, name: "ping_pong_king"
-        @project.users << user
-        member = @project.users_projects.where(user_id: user).first
-
-        gfm("@#{user.name} you are right").should == "#{link_to "@#{user.name}", project_team_member_path(@project, member), class: "gfm gfm-team_member "} you are right"
-      end
-
-      it "should link with adjecent text" do
-        user = Factory.create(:user, name: "ace")
-        @project.users << user
-        member = @project.users_projects.where(user_id: user).first
-
-        gfm("Mail the Admin (@#{user.name})").should == "Mail the Admin (#{link_to "@#{user.name}", project_team_member_path(@project, member), class: "gfm gfm-team_member "})"
-      end
-
-      it "should add styles" do
-        user = Factory :user, name: "barry"
-        @project.users << user
-        gfm("@#{user.name} you are right").should have_selector(".gfm.gfm-team_member")
-      end
-
-      it "should not link using a bogus name" do
-        gfm("What hapened to @foo?").should == "What hapened to @foo?"
-      end
-    end
-
-    describe "referencing an issue" do
-      before do
-        @issue = Factory :issue, assignee: @fake_user, author: @fake_user, project: @project
-        @invalid_issue = Factory :issue, assignee: @fake_user, author: @fake_user, project: @other_project
-      end
-
-      it "should link using a correct id" do
-        gfm("Fixes ##{@issue.id}").should == "Fixes #{link_to "##{@issue.id}", project_issue_path(@project, @issue), title: "Issue: #{@issue.title}", class: "gfm gfm-issue "}"
-      end
-
-      it "should link with adjecent text" do
-        gfm("This has already been discussed (see ##{@issue.id})").should == "This has already been discussed (see #{link_to "##{@issue.id}", project_issue_path(@project, @issue), title: "Issue: #{@issue.title}", class: "gfm gfm-issue "})"
-      end
-
-      it "should add styles" do
-        gfm("Fixes ##{@issue.id}").should have_selector(".gfm.gfm-issue")
-      end
-
-      it "should not link using an invalid id" do
-        gfm("##{@invalid_issue.id} has been marked duplicate of this").should == "##{@invalid_issue.id} has been marked duplicate of this"
-      end
-    end
-
-    describe "referencing a merge request" do
-      before do
-        @merge_request = Factory :merge_request, assignee: @fake_user, author: @fake_user, project: @project
-        @invalid_merge_request = Factory :merge_request, assignee: @fake_user, author: @fake_user, project: @other_project
-      end
-
-      it "should link using a correct id" do
-        gfm("Fixed in !#{@merge_request.id}").should == "Fixed in #{link_to "!#{@merge_request.id}", project_merge_request_path(@project, @merge_request), title: "Merge Request: #{@merge_request.title}", class: "gfm gfm-merge_request "}"
-      end
-
-      it "should link with adjecent text" do
-        gfm("This has been fixed already (see !#{@merge_request.id})").should == "This has been fixed already (see #{link_to "!#{@merge_request.id}", project_merge_request_path(@project, @merge_request), title: "Merge Request: #{@merge_request.title}", class: "gfm gfm-merge_request "})"
-      end
-
-      it "should add styles" do
-        gfm("Fixed in !#{@merge_request.id}").should have_selector(".gfm.gfm-merge_request")
-      end
-
-      it "should not link using an invalid id" do
-        gfm("!#{@invalid_merge_request.id} violates our coding guidelines")
-      end
-    end
-
-    describe "referencing a snippet" do
-      before do
-        @snippet = Factory.create(:snippet,
-                                  title: "Render asset to string",
-                                  author: @fake_user,
-                                  project: @project)
-      end
-
-      it "should link using a correct id" do
-        gfm("Check out $#{@snippet.id}").should == "Check out #{link_to "$#{@snippet.id}", project_snippet_path(@project, @snippet), title: "Snippet: #{@snippet.title}", class: "gfm gfm-snippet "}"
-      end
-
-      it "should link with adjecent text" do
-        gfm("I have created a snippet for that ($#{@snippet.id})").should == "I have created a snippet for that (#{link_to "$#{@snippet.id}", project_snippet_path(@project, @snippet), title: "Snippet: #{@snippet.title}", class: "gfm gfm-snippet "})"
-      end
-
-      it "should add styles" do
-        gfm("Check out $#{@snippet.id}").should have_selector(".gfm.gfm-snippet")
-      end
-
-      it "should not link using an invalid id" do
-        gfm("Don't use $1234").should == "Don't use $1234"
-      end
-    end
-
-    it "should link to multiple things" do
-      user = Factory :user, name: "barry"
-      @project.users << user
-      member = @project.users_projects.where(user_id: user).first
-
-      gfm("Let @#{user.name} fix the *mess* in #{@commit.id}").should == "Let #{link_to "@#{user.name}", project_team_member_path(@project, member), class: "gfm gfm-team_member "} fix the *mess* in #{link_to @commit.id, project_commit_path(@project, id: @commit.id), title: "Commit: #{@commit.author_name} - #{@commit.title}", class: "gfm gfm-commit "}"
-    end
-
-    it "should not trip over other stuff" do
-      gfm("_Please_ *stop* 'helping' and all the other b*$#%' you do.").should == "_Please_ *stop* 'helping' and all the other b*$#%' you do."
-    end
-
-    it "should not touch HTML entities" do
-      gfm("We&#39;ll accept good pull requests.").should == "We&#39;ll accept good pull requests."
-    end
-
-    it "should forward HTML options to links" do
-      gfm("fixed in #{@commit.id}", class: "foo").should have_selector("a.foo")
-    end
-  end
-
-  describe "#link_to_gfm" do
-    let(:issue1) { Factory :issue, assignee: @fake_user, author: @fake_user, project: @project }
-    let(:issue2) { Factory :issue, assignee: @fake_user, author: @fake_user, project: @project }
-
-    it "should handle references nested in links with all the text" do
-      link_to_gfm("This should finally fix ##{issue1.id} and ##{issue2.id} for real", project_commit_path(@project, id: @commit.id)).should == "#{link_to "This should finally fix ", project_commit_path(@project, id: @commit.id)}#{link_to "##{issue1.id}", project_issue_path(@project, issue1), title: "Issue: #{issue1.title}", class: "gfm gfm-issue "}#{link_to " and ", project_commit_path(@project, id: @commit.id)}#{link_to "##{issue2.id}", project_issue_path(@project, issue2), title: "Issue: #{issue2.title}", class: "gfm gfm-issue "}#{link_to " for real", project_commit_path(@project, id: @commit.id)}"
-    end
-
-    it "should forward HTML options" do
-      link_to_gfm("This should finally fix ##{issue1.id} for real", project_commit_path(@project, id: @commit.id), class: "foo").should have_selector(".foo")
-    end
-  end
-
-  describe "#markdown" do
-    before do
-      @issue = Factory :issue, assignee: @fake_user, author: @fake_user, project: @project
-      @merge_request = Factory :merge_request, assignee: @fake_user, author: @fake_user, project: @project
-      @note = Factory.create(:note,
-                              note: "Screenshot of the new feature",
-                              project: @project,
-                              noteable_id: @commit.id,
-                              noteable_type: "Commit",
-                              attachment: "screenshot123.jpg")
-      @snippet = Factory.create(:snippet,
-                                title: "Render asset to string",
-                                author: @fake_user,
-                                project: @project)
-
-      @other_user = Factory :user, name: "bill"
-      @project.users << @other_user
-      @member = @project.users_projects.where(user_id: @other_user).first
-    end
-
-    it "should handle references in paragraphs" do
-      markdown("\n\nLorem ipsum dolor sit amet, consectetur adipiscing elit. #{@commit.id} Nam pulvinar sapien eget odio adipiscing at faucibus orci vestibulum.\n").should == "<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. #{link_to @commit.id, project_commit_path(@project, id: @commit.id), title: "Commit: #{@commit.author_name} - #{@commit.title}", class: "gfm gfm-commit "} Nam pulvinar sapien eget odio adipiscing at faucibus orci vestibulum.</p>\n"
-    end
-
-    it "should handle references in headers" do
-      markdown("\n# Working around ##{@issue.id} for now\n## Apply !#{@merge_request.id}").should == "<h1 id=\"toc_0\">Working around #{link_to "##{@issue.id}", project_issue_path(@project, @issue), title: "Issue: #{@issue.title}", class: "gfm gfm-issue "} for now</h1>\n\n<h2 id=\"toc_1\">Apply #{link_to "!#{@merge_request.id}", project_merge_request_path(@project, @merge_request), title: "Merge Request: #{@merge_request.title}", class: "gfm gfm-merge_request "}</h2>\n"
-    end
-
-    it "should handle references in lists" do
-      markdown("\n* dark: ##{@issue.id}\n* light by @#{@other_user.name}\n").should == "<ul>\n<li>dark: #{link_to "##{@issue.id}", project_issue_path(@project, @issue), title: "Issue: #{@issue.title}", class: "gfm gfm-issue "}</li>\n<li>light by #{link_to "@#{@other_user.name}", project_team_member_path(@project, @member), class: "gfm gfm-team_member "}</li>\n</ul>\n"
-    end
-
-    it "should handle references in <em>" do
-      markdown("Apply _!#{@merge_request.id}_ ASAP").should == "<p>Apply <em>#{link_to "!#{@merge_request.id}", project_merge_request_path(@project, @merge_request), title: "Merge Request: #{@merge_request.title}", class: "gfm gfm-merge_request "}</em> ASAP</p>\n"
-    end
-
-    it "should leave code blocks untouched" do
-      markdown("\n    some code from $#{@snippet.id}\n    here too\n").should == "<div class=\"highlight\"><pre><span class=\"n\">some</span> <span class=\"n\">code</span> <span class=\"n\">from</span> $#{@snippet.id}\n<span class=\"n\">here</span> <span class=\"n\">too</span>\n</pre>\n</div>\n"
-
-      markdown("\n```\nsome code from $#{@snippet.id}\nhere too\n```\n").should == "<div class=\"highlight\"><pre><span class=\"n\">some</span> <span class=\"n\">code</span> <span class=\"n\">from</span> $#{@snippet.id}\n<span class=\"n\">here</span> <span class=\"n\">too</span>\n</pre>\n</div>\n"
-    end
-
-    it "should leave inline code untouched" do
-      markdown("\nDon't use `$#{@snippet.id}` here.\n").should == "<p>Don&#39;t use <code>$#{@snippet.id}</code> here.</p>\n"
-    end
-  end
-end
diff --git a/spec/helpers/gitlab_markdown_helper_spec.rb b/spec/helpers/gitlab_markdown_helper_spec.rb
new file mode 100644
index 00000000000..00164e0cdd7
--- /dev/null
+++ b/spec/helpers/gitlab_markdown_helper_spec.rb
@@ -0,0 +1,288 @@
+require "spec_helper"
+
+describe GitlabMarkdownHelper do
+  let!(:project) { create(:project) }
+
+  let(:user)          { create(:user, name: 'gfm') }
+  let(:commit)        { CommitDecorator.decorate(project.commit) }
+  let(:issue)         { create(:issue, project: project) }
+  let(:merge_request) { create(:merge_request, project: project) }
+  let(:snippet)       { create(:snippet, project: project) }
+  let(:member)        { project.users_projects.where(user_id: user).first }
+
+  before do
+    # Helper expects a @project instance variable
+    @project = project
+  end
+
+  describe "#gfm" do
+    it "should return unaltered text if project is nil" do
+      actual = "Testing references: ##{issue.id}"
+
+      gfm(actual).should_not == actual
+
+      @project = nil
+      gfm(actual).should == actual
+    end
+
+    it "should not alter non-references" do
+      actual = expected = "_Please_ *stop* 'helping' and all the other b*$#%' you do."
+      gfm(actual).should == expected
+    end
+
+    it "should not touch HTML entities" do
+      actual = expected = "We&#39;ll accept good pull requests."
+      gfm(actual).should == expected
+    end
+
+    it "should forward HTML options to links" do
+      gfm("Fixed in #{commit.id}", class: "foo").should have_selector("a.gfm.foo")
+    end
+
+    describe "referencing a commit" do
+      let(:expected) { project_commit_path(project, commit) }
+
+      it "should link using a full id" do
+        actual = "Reverts #{commit.id}"
+        gfm(actual).should match(expected)
+      end
+
+      it "should link using a short id" do
+        actual = "Backported from #{commit.short_id(6)}"
+        gfm(actual).should match(expected)
+      end
+
+      it "should link with adjacent text" do
+        actual = "Reverted (see #{commit.id})"
+        gfm(actual).should match(expected)
+      end
+
+      it "should keep whitespace intact" do
+        actual   = "Changes #{commit.id} dramatically"
+        expected = /Changes <a.+>#{commit.id}<\/a> dramatically/
+        gfm(actual).should match(expected)
+      end
+
+      it "should not link with an invalid id" do
+        actual = expected = "What happened in #{commit.id.reverse}"
+        gfm(actual).should == expected
+      end
+
+      it "should include a title attribute" do
+        actual = "Reverts #{commit.id}"
+        gfm(actual).should match(/title="#{commit.link_title}"/)
+      end
+
+      it "should include standard gfm classes" do
+        actual = "Reverts #{commit.id}"
+        gfm(actual).should match(/class="\s?gfm gfm-commit\s?"/)
+      end
+    end
+
+    describe "referencing a team member" do
+      let(:actual)   { "@#{user.name} you are right." }
+      let(:expected) { project_team_member_path(project, member) }
+
+      before do
+        project.users << user
+      end
+
+      it "should link using a simple name" do
+        gfm(actual).should match(expected)
+      end
+
+      it "should link using a name with dots" do
+        user.update_attributes(name: "alphA.Beta")
+        gfm(actual).should match(expected)
+      end
+
+      it "should link using name with underscores" do
+        user.update_attributes(name: "ping_pong_king")
+        gfm(actual).should match(expected)
+      end
+
+      it "should link with adjacent text" do
+        actual = "Mail the admin (@gfm)"
+        gfm(actual).should match(expected)
+      end
+
+      it "should keep whitespace intact" do
+        actual   = "Yes, @#{user.name} is right."
+        expected = /Yes, <a.+>@#{user.name}<\/a> is right/
+        gfm(actual).should match(expected)
+      end
+
+      it "should not link with an invalid id" do
+        actual = expected = "@#{user.name.reverse} you are right."
+        gfm(actual).should == expected
+      end
+
+      it "should include standard gfm classes" do
+        gfm(actual).should match(/class="\s?gfm gfm-team_member\s?"/)
+      end
+    end
+
+    # Shared examples for referencing an object
+    #
+    # Expects the following attributes to be available in the example group:
+    #
+    # - object    - The object itself
+    # - reference - The object reference string (e.g., #1234, $1234, !1234)
+    #
+    # Currently limited to Snippets, Issues and MergeRequests
+    shared_examples 'referenced object' do
+      let(:actual)   { "Reference to #{reference}" }
+      let(:expected) { polymorphic_path([project, object]) }
+
+      it "should link using a valid id" do
+        gfm(actual).should match(expected)
+      end
+
+      it "should link with adjacent text" do
+        # Wrap the reference in parenthesis
+        gfm(actual.gsub(reference, "(#{reference})")).should match(expected)
+
+        # Append some text to the end of the reference
+        gfm(actual.gsub(reference, "#{reference}, right?")).should match(expected)
+      end
+
+      it "should keep whitespace intact" do
+        actual   = "Referenced #{reference} already."
+        expected = /Referenced <a.+>[^\s]+<\/a> already/
+        gfm(actual).should match(expected)
+      end
+
+      it "should not link with an invalid id" do
+        # Modify the reference string so it's still parsed, but is invalid
+        reference.gsub!(/^(.)(\d+)$/, '\1' + ('\2' * 2))
+        gfm(actual).should == actual
+      end
+
+      it "should include a title attribute" do
+        title = "#{object.class.to_s.titlecase}: #{object.title}"
+        gfm(actual).should match(/title="#{title}"/)
+      end
+
+      it "should include standard gfm classes" do
+        css = object.class.to_s.underscore
+        gfm(actual).should match(/class="\s?gfm gfm-#{css}\s?"/)
+      end
+    end
+
+    describe "referencing an issue" do
+      let(:object)    { issue }
+      let(:reference) { "##{issue.id}" }
+
+      include_examples 'referenced object'
+    end
+
+    describe "referencing a merge request" do
+      let(:object)    { merge_request }
+      let(:reference) { "!#{merge_request.id}" }
+
+      include_examples 'referenced object'
+    end
+
+    describe "referencing a snippet" do
+      let(:object)    { snippet }
+      let(:reference) { "$#{snippet.id}" }
+
+      include_examples 'referenced object'
+    end
+
+    describe "referencing multiple objects" do
+      let(:actual) { "!#{merge_request.id} -> #{commit.id} -> ##{issue.id}" }
+
+      it "should link to the merge request" do
+        expected = project_merge_request_path(project, merge_request)
+        gfm(actual).should match(expected)
+      end
+
+      it "should link to the commit" do
+        expected = project_commit_path(project, commit)
+        gfm(actual).should match(expected)
+      end
+
+      it "should link to the issue" do
+        expected = project_issue_path(project, issue)
+        gfm(actual).should match(expected)
+      end
+    end
+  end
+
+  describe "#link_to_gfm" do
+    let(:commit_path) { project_commit_path(project, commit) }
+    let(:issues)      { create_list(:issue, 2, project: project) }
+
+    it "should handle references nested in links with all the text" do
+      actual = link_to_gfm("This should finally fix ##{issues[0].id} and ##{issues[1].id} for real", commit_path)
+
+      # Break the result into groups of links with their content, without
+      # closing tags
+      groups = actual.split("</a>")
+
+      # Leading commit link
+      groups[0].should match(/href="#{commit_path}"/)
+      groups[0].should match(/This should finally fix $/)
+
+      # First issue link
+      groups[1].should match(/href="#{project_issue_path(project, issues[0])}"/)
+      groups[1].should match(/##{issues[0].id}$/)
+
+      # Internal commit link
+      groups[2].should match(/href="#{commit_path}"/)
+      groups[2].should match(/ and /)
+
+      # Second issue link
+      groups[3].should match(/href="#{project_issue_path(project, issues[1])}"/)
+      groups[3].should match(/##{issues[1].id}$/)
+
+      # Trailing commit link
+      groups[4].should match(/href="#{commit_path}"/)
+      groups[4].should match(/ for real$/)
+    end
+
+    it "should forward HTML options" do
+      actual = link_to_gfm("Fixed in #{commit.id}", commit_path, class: 'foo')
+      actual.should have_selector 'a.gfm.gfm-commit.foo'
+    end
+  end
+
+  describe "#markdown" do
+    it "should handle references in paragraphs" do
+      markdown("\n\nLorem ipsum dolor sit amet, consectetur adipiscing elit. #{commit.id} Nam pulvinar sapien eget odio adipiscing at faucibus orci vestibulum.\n").should == "<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. #{link_to commit.id, project_commit_path(project, commit), title: commit.link_title, class: "gfm gfm-commit "} Nam pulvinar sapien eget odio adipiscing at faucibus orci vestibulum.</p>\n"
+    end
+
+    it "should handle references in headers" do
+      actual = "\n# Working around ##{issue.id}\n## Apply !#{merge_request.id}"
+
+      markdown(actual).should match(%r{<h1[^<]*>Working around <a.+>##{issue.id}</a></h1>})
+      markdown(actual).should match(%r{<h2[^<]*>Apply <a.+>!#{merge_request.id}</a></h2>})
+    end
+
+    it "should handle references in lists" do
+      project.users << user
+
+      actual = "\n* dark: ##{issue.id}\n* light by @#{member.user_name}"
+
+      markdown(actual).should match(%r{<li>dark: <a.+>##{issue.id}</a></li>})
+      markdown(actual).should match(%r{<li>light by <a.+>@#{member.user_name}</a></li>})
+    end
+
+    it "should handle references in <em>" do
+      actual = "Apply _!#{merge_request.id}_ ASAP"
+
+      markdown(actual).should match(%r{Apply <em><a.+>!#{merge_request.id}</a></em>})
+    end
+
+    it "should leave code blocks untouched" do
+      markdown("\n    some code from $#{snippet.id}\n    here too\n").should == "<div class=\"highlight\"><pre><span class=\"n\">some</span> <span class=\"n\">code</span> <span class=\"n\">from</span> $#{snippet.id}\n<span class=\"n\">here</span> <span class=\"n\">too</span>\n</pre>\n</div>\n"
+
+      markdown("\n```\nsome code from $#{snippet.id}\nhere too\n```\n").should == "<div class=\"highlight\"><pre><span class=\"n\">some</span> <span class=\"n\">code</span> <span class=\"n\">from</span> $#{snippet.id}\n<span class=\"n\">here</span> <span class=\"n\">too</span>\n</pre>\n</div>\n"
+    end
+
+    it "should leave inline code untouched" do
+      markdown("\nDon't use `$#{snippet.id}` here.\n").should == "<p>Don&#39;t use <code>$#{snippet.id}</code> here.</p>\n"
+    end
+  end
+end