Fix emoji URLs in Markdown when relative_url_root is used

Also adds the ability to run rspecs with relative_url_defined on the enviornment. For example:

RELATIVE_URL_ROOT=/gitlab rspec

Closes #1728

2 files changed, 11 insertions, 0 deletions

diff --git a/spec/support/matchers/markdown_matchers.rb b/spec/support/matchers/markdown_matchers.rb
index 9df226c3af8..7500d0fdf80 100644
--- a/spec/support/matchers/markdown_matchers.rb
+++ b/spec/support/matchers/markdown_matchers.rb
@@ -27,6 +27,9 @@ module MarkdownMatchers
 
     match do |actual|
       expect(actual).to have_selector('img.emoji', count: 10)
+
+      image = actual.at_css('img.emoji')
+      expect(image['src'].to_s).to start_with(Gitlab.config.gitlab.url + '/assets')
     end
   end
 
diff --git a/spec/support/relative_url.rb b/spec/support/relative_url.rb
new file mode 100644
index 00000000000..72e3ccce75b
--- /dev/null
+++ b/spec/support/relative_url.rb
@@ -0,0 +1,8 @@
+# Fix route helpers in tests (e.g. root_path, ...)
+module RelativeUrl
+  extend ActiveSupport::Concern
+
+  included do
+    default_url_options[:script_name] = Rails.application.config.relative_url_root
+  end
+end