1 files changed, 39 insertions, 0 deletions
diff --git a/spec/services/merge_requests/rebase_service_spec.rb b/spec/services/merge_requests/rebase_service_spec.rb
index e7aa6e74246..316f20d8276 100644
--- a/spec/services/merge_requests/rebase_service_spec.rb
+++ b/spec/services/merge_requests/rebase_service_spec.rb
@@ -24,6 +24,45 @@ RSpec.describe MergeRequests::RebaseService do
     project.add_maintainer(user)
   end
 
+  describe '#validate' do
+    subject { service.validate(merge_request) }
+
+    it { is_expected.to be_success }
+
+    context 'when source branch does not exist' do
+      before do
+        merge_request.update!(source_branch: 'does_not_exist')
+      end
+
+      it 'returns an error' do
+        is_expected.to be_error
+        expect(subject.message).to eq('Source branch does not exist')
+      end
+    end
+
+    context 'when user has no permissions to rebase' do
+      before do
+        project.add_guest(user)
+      end
+
+      it 'returns an error' do
+        is_expected.to be_error
+        expect(subject.message).to eq('Cannot push to source branch')
+      end
+    end
+
+    context 'when branch is protected' do
+      before do
+        create(:protected_branch, project: project, name: merge_request.source_branch, allow_force_push: false)
+      end
+
+      it 'returns an error' do
+        is_expected.to be_error
+        expect(subject.message).to eq('Source branch is protected from force push')
+      end
+    end
+  end
+
   describe '#execute' do
     shared_examples 'sequence of failure and success' do
       it 'properly clears the error message' do