Merge branch 'disable-commenting-on-unrelatable-diff-line' into 'master'

CHANGELOG

@@ -3,6 +3,7 @@ Please view this file on the master branch, on stable branches it's out of date.
 v 8.12.0 (unreleased)
   - Change merge_error column from string to text type
   - Optimistic locking for Issues and Merge Requests (title and description overriding prevention)
+  - Added tests for diff notes
 
 v 8.11.1 (unreleased)
   - Fix file links on project page when default view is Files !5933

app/assets/javascripts/files_comment_button.js

@@ -39,12 +39,13 @@
     FilesCommentButton.prototype.render = function(e) {
       var $currentTarget, buttonParentElement, lineContentElement, textFileElement;
       $currentTarget = $(e.currentTarget);
+
       buttonParentElement = this.getButtonParent($currentTarget);
-      if (!this.shouldRender(e, buttonParentElement)) {
-        return;
-      }
-      textFileElement = this.getTextFileElement($currentTarget);
+      if (!this.validateButtonParent(buttonParentElement)) return;
       lineContentElement = this.getLineContent($currentTarget);
+      if (!this.validateLineContent(lineContentElement)) return;
+
+      textFileElement = this.getTextFileElement($currentTarget);
       buttonParentElement.append(this.buildButton({
         noteableType: textFileElement.attr('data-noteable-type'),
         noteableID: textFileElement.attr('data-noteable-id'),
@@ -119,10 +120,14 @@
       return newButtonParent.is(this.getButtonParent($(e.currentTarget)));
     };
 
-    FilesCommentButton.prototype.shouldRender = function(e, buttonParentElement) {
+    FilesCommentButton.prototype.validateButtonParent = function(buttonParentElement) {
       return !buttonParentElement.hasClass(EMPTY_CELL_CLASS) && !buttonParentElement.hasClass(UNFOLDABLE_LINE_CLASS) && $(COMMENT_BUTTON_CLASS, buttonParentElement).length === 0;
     };
 
+    FilesCommentButton.prototype.validateLineContent = function(lineContentElement) {
+      return lineContentElement.attr('data-discussion-id') && lineContentElement.attr('data-discussion-id') !== '';
+    };
+
     return FilesCommentButton;
 
   })();

spec/features/merge_requests/diff_notes_spec.rb

@@ -15,7 +15,7 @@ feature 'Diff notes', js: true, feature: true do
     let(:notes_holder_input_xpath) { './following-sibling::*[contains(concat(" ", @class, " "), " notes_holder ")]' }
     let(:test_note_comment) { 'this is a test note!' }
 
-    context 'when hovering over the parallel view diff file' do
+    context 'when hovering over a parallel view diff file' do
       before(:each) do
         visit diffs_namespace_project_merge_request_path(@project.namespace, @project, @merge_request, view: 'parallel')
       end
@@ -69,9 +69,28 @@ feature 'Diff notes', js: true, feature: true do
           should_not_allow_commenting(find('.match', match: :first).find(:xpath, '..'), 'right')
         end
       end
+
+      context 'with an unfolded line' do
+        before(:each) do
+          find('.js-unfold', match: :first).click
+          wait_for_ajax
+        end
+
+        # The first `.js-unfold` unfolds upwards, therefore the first
+        # `.line_holder` will be an unfolded line.
+        let(:line_holder) { first('.line_holder[id="1"]') }
+
+        it 'should not allow commenting on the left side' do
+          should_not_allow_commenting(line_holder, 'left')
+        end
+
+        it 'should not allow commenting on the right side' do
+          should_not_allow_commenting(line_holder, 'right')
+        end
+      end
     end
 
-    context 'when hovering over the inline view diff file' do
+    context 'when hovering over an inline view diff file' do
       before do
         visit diffs_namespace_project_merge_request_path(@project.namespace, @project, @merge_request, view: 'inline')
       end
@@ -99,6 +118,33 @@ feature 'Diff notes', js: true, feature: true do
           should_not_allow_commenting(find('.match', match: :first))
         end
       end
+
+      context 'with an unfolded line' do
+        before(:each) do
+          find('.js-unfold', match: :first).click
+          wait_for_ajax
+        end
+
+        # The first `.js-unfold` unfolds upwards, therefore the first
+        # `.line_holder` will be an unfolded line.
+        let(:line_holder) { first('.line_holder[id="1"]') }
+
+        it 'should not allow commenting' do
+          should_not_allow_commenting line_holder
+        end
+      end
+
+      context 'when hovering over a diff discussion' do
+        before do
+          visit diffs_namespace_project_merge_request_path(@project.namespace, @project, @merge_request, view: 'inline')
+          should_allow_commenting(find('[id="2f6fcd96b88b36ce98c38da085c795a27d92a3dd_7_7"]'))
+          visit namespace_project_merge_request_path(@project.namespace, @project, @merge_request)
+        end
+
+        it 'should not allow commenting' do
+          should_not_allow_commenting(find('.line_holder', match: :first))
+        end
+      end
     end
 
     def should_allow_commenting(line_holder, diff_side = nil)