Put the use of "No Label" in the descriptiontc-clean-up-no-label-doc

To get the issues that have no label, the special keyword `No Label`
can be used. This `No Label` label can be used like any other label.

1 files changed, 10 insertions, 0 deletions

diff --git a/spec/requests/api/issues_spec.rb b/spec/requests/api/issues_spec.rb
index de7dbca0b22..e7738ca3034 100644
--- a/spec/requests/api/issues_spec.rb
+++ b/spec/requests/api/issues_spec.rb
@@ -153,6 +153,16 @@ describe API::Issues, api: true  do
         expect(json_response.first['state']).to eq('opened')
       end
 
+      it 'returns unlabeled issues for "No Label" label' do
+        get api("/issues", user), labels: 'No Label'
+
+        expect(response).to have_http_status(200)
+        expect(response).to include_pagination_headers
+        expect(json_response).to be_an Array
+        expect(json_response.length).to eq(1)
+        expect(json_response.first['labels']).to be_empty
+      end
+
       it 'returns an empty array if no issue matches labels and state filters' do
         get api("/issues?labels=#{label.title}&state=closed", user)