Merge branch 'qa-escape-netrc-regex' into 'master'

[QA] Escape arg used as regex

Closes gitlab-org/quality/performance#2

See merge request gitlab-org/gitlab-ce!28104

qa/qa/git/repository.rb

@@ -251,7 +251,7 @@ module QA
       end
       def netrc_already_contains_content?
-        read_netrc_content.grep(/^#{netrc_content}$/).any?
+        read_netrc_content.grep(/^#{Regexp.escape(netrc_content)}$/).any?
       end
     end
   end

qa/spec/git/repository_spec.rb

@@ -116,6 +116,15 @@ describe QA::Git::Repository do
         expect(File.read(File.join(tmp_netrc_dir, '.netrc')))
           .to eq("machine foo login user password foo\n")
       end
+
+      it 'adds credentials with special characters' do
+        password = %q[!"#$%&')(*+,-./:;<=>?]
+        repository.username = 'user'
+        repository.password = password
+
+        expect(File.read(File.join(tmp_netrc_dir, '.netrc')))
+          .to eq("machine foo login user password #{password}\n")
+      end
     end
   end
 end