Merge branch 'api-delete-note' into 'master'

Delete notes via API

Supports deleting issues, snippets, and merge requests via the API.

* Closes #14944
* Closes #14845 
* Closes #6060 

@zj I did not see that you assigned yourself in #6060. Hopefully, you did not start yet.

@rymai In #6060 this is targeted for 8.7 release. Could you review that and maybe this still lands in 8.7. 


See merge request !3557

2 files changed, 76 insertions, 0 deletions

diff --git a/spec/requests/api/notes_spec.rb b/spec/requests/api/notes_spec.rb
index 39f9a06fe1b..a467bc935af 100644
--- a/spec/requests/api/notes_spec.rb
+++ b/spec/requests/api/notes_spec.rb
@@ -241,4 +241,65 @@ describe API::API, api: true  do
     end
   end
 
+  describe 'DELETE /projects/:id/noteable/:noteable_id/notes/:note_id' do
+    context 'when noteable is an Issue' do
+      it 'deletes a note' do
+        delete api("/projects/#{project.id}/issues/#{issue.id}/"\
+                   "notes/#{issue_note.id}", user)
+
+        expect(response.status).to eq(200)
+        # Check if note is really deleted
+        delete api("/projects/#{project.id}/issues/#{issue.id}/"\
+                   "notes/#{issue_note.id}", user)
+        expect(response.status).to eq(404)
+      end
+
+      it 'returns a 404 error when note id not found' do
+        delete api("/projects/#{project.id}/issues/#{issue.id}/notes/123", user)
+
+        expect(response.status).to eq(404)
+      end
+    end
+
+    context 'when noteable is a Snippet' do
+      it 'deletes a note' do
+        delete api("/projects/#{project.id}/snippets/#{snippet.id}/"\
+                   "notes/#{snippet_note.id}", user)
+
+        expect(response.status).to eq(200)
+        # Check if note is really deleted
+        delete api("/projects/#{project.id}/snippets/#{snippet.id}/"\
+                   "notes/#{snippet_note.id}", user)
+        expect(response.status).to eq(404)
+      end
+
+      it 'returns a 404 error when note id not found' do
+        delete api("/projects/#{project.id}/snippets/#{snippet.id}/"\
+                   "notes/123", user)
+
+        expect(response.status).to eq(404)
+      end
+    end
+
+    context 'when noteable is a Merge Request' do
+      it 'deletes a note' do
+        delete api("/projects/#{project.id}/merge_requests/"\
+                   "#{merge_request.id}/notes/#{merge_request_note.id}", user)
+
+        expect(response.status).to eq(200)
+        # Check if note is really deleted
+        delete api("/projects/#{project.id}/merge_requests/"\
+                   "#{merge_request.id}/notes/#{merge_request_note.id}", user)
+        expect(response.status).to eq(404)
+      end
+
+      it 'returns a 404 error when note id not found' do
+        delete api("/projects/#{project.id}/merge_requests/"\
+                   "#{merge_request.id}/notes/123", user)
+
+        expect(response.status).to eq(404)
+      end
+    end
+  end
+
 end
diff --git a/spec/services/notes/delete_service_spec.rb b/spec/services/notes/delete_service_spec.rb
new file mode 100644
index 00000000000..1d0a747a480
--- /dev/null
+++ b/spec/services/notes/delete_service_spec.rb
@@ -0,0 +1,15 @@
+require 'spec_helper'
+
+describe Notes::DeleteService, services: true do
+  describe '#execute' do
+    it 'deletes a note' do
+      project = create(:empty_project)
+      issue = create(:issue, project: project)
+      note = create(:note, project: project, noteable: issue)
+
+      described_class.new(project, note.author).execute(note)
+
+      expect(project.issues.find(issue.id).notes).not_to include(note)
+    end
+  end
+end