1 files changed, 19 insertions, 3 deletions
diff --git a/spec/features/projects/blobs/edit_spec.rb b/spec/features/projects/blobs/edit_spec.rb
index 69e4c9f04a1..89d3bd24b89 100644
--- a/spec/features/projects/blobs/edit_spec.rb
+++ b/spec/features/projects/blobs/edit_spec.rb
@@ -17,12 +17,15 @@ feature 'Editing file blob', :js do
       sign_in(user)
     end
 
-    def edit_and_commit
+    def edit_and_commit(commit_changes: true)
       wait_for_requests
       find('.js-edit-blob').click
       find('#editor')
       execute_script('ace.edit("editor").setValue("class NextFeature\nend\n")')
-      click_button 'Commit changes'
+
+      if commit_changes
+        click_button 'Commit changes'
+      end
     end
 
     context 'from MR diff' do
@@ -39,13 +42,26 @@ feature 'Editing file blob', :js do
     context 'from blob file path' do
       before do
         visit project_blob_path(project, tree_join(branch, file_path))
-        edit_and_commit
       end
 
       it 'updates content' do
+        edit_and_commit
+
         expect(page).to have_content 'successfully committed'
         expect(page).to have_content 'NextFeature'
       end
+
+      it 'previews content' do
+        edit_and_commit(commit_changes: false)
+        click_link 'Preview changes'
+        wait_for_requests
+
+        old_line_count = page.all('.line_holder.old').size
+        new_line_count = page.all('.line_holder.new').size
+
+        expect(old_line_count).to be > 0
+        expect(new_line_count).to be > 0
+      end
     end
   end