Add test for commit.reverting_commit

spec/models/commit_spec.rb

@@ -750,6 +750,30 @@ eos
     end
   end
 
+  describe '#reverting_commit' do
+    let(:user) { create(:user) }
+    let(:issue) { create(:issue, author: user, project: project) }
+
+    it 'returns true if the commit has been reverted' do
+      create(:note_on_issue,
+             noteable: issue,
+             system: true,
+             note: commit.revert_description(user),
+             project: issue.project)
+
+      reverting_commit = nil
+
+      expect_next_instance_of(Commit) do |revert_commit|
+        reverting_commit = revert_commit
+        expect(revert_commit).to receive(:reverts_commit?)
+          .with(commit, user)
+          .and_return(true)
+      end
+
+      expect(commit.reverting_commit(user, issue.notes_with_associations)).to eq(reverting_commit)
+    end
+  end
+
   describe '#has_been_reverted?' do
     let(:user) { create(:user) }
     let(:issue) { create(:issue, author: user, project: project) }