1 files changed, 61 insertions, 0 deletions
diff --git a/spec/workers/merge_requests/create_pipeline_worker_spec.rb b/spec/workers/merge_requests/create_pipeline_worker_spec.rb
new file mode 100644
index 00000000000..8efce5220be
--- /dev/null
+++ b/spec/workers/merge_requests/create_pipeline_worker_spec.rb
@@ -0,0 +1,61 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe MergeRequests::CreatePipelineWorker do
+  subject(:worker) { described_class.new }
+
+  describe '#perform' do
+    let(:user) { create(:user) }
+    let(:project) { create(:project) }
+    let(:merge_request) { create(:merge_request) }
+
+    context 'when the objects exist' do
+      it 'calls the merge request create pipeline service and calls update head pipeline' do
+        aggregate_failures do
+          expect_next_instance_of(MergeRequests::CreatePipelineService, project, user) do |service|
+            expect(service).to receive(:execute).with(merge_request)
+          end
+
+          expect(MergeRequest).to receive(:find_by_id).with(merge_request.id).and_return(merge_request)
+          expect(merge_request).to receive(:update_head_pipeline)
+
+          subject.perform(project.id, user.id, merge_request.id)
+        end
+      end
+    end
+
+    shared_examples 'when object does not exist' do
+      it 'does not call the create pipeline service' do
+        expect(MergeRequests::CreatePipelineService).not_to receive(:new)
+
+        expect { subject.perform(project.id, user.id, merge_request.id) }
+          .not_to raise_exception
+      end
+    end
+
+    context 'when the project does not exist' do
+      before do
+        project.destroy!
+      end
+
+      it_behaves_like 'when object does not exist'
+    end
+
+    context 'when the user does not exist' do
+      before do
+        user.destroy!
+      end
+
+      it_behaves_like 'when object does not exist'
+    end
+
+    context 'when the merge request does not exist' do
+      before do
+        merge_request.destroy!
+      end
+
+      it_behaves_like 'when object does not exist'
+    end
+  end
+end