1 files changed, 53 insertions, 0 deletions
diff --git a/spec/services/ci/create_pipeline_service/merge_requests_spec.rb b/spec/services/ci/create_pipeline_service/merge_requests_spec.rb
new file mode 100644
index 00000000000..e5347faed6a
--- /dev/null
+++ b/spec/services/ci/create_pipeline_service/merge_requests_spec.rb
@@ -0,0 +1,53 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Ci::CreatePipelineService do
+  context 'merge requests handling' do
+    let_it_be(:project)  { create(:project, :repository) }
+    let_it_be(:user)     { project.owner }
+
+    let(:ref)      { 'refs/heads/feature' }
+    let(:source)   { :push }
+    let(:service)  { described_class.new(project, user, { ref: ref }) }
+    let(:pipeline) { service.execute(source) }
+
+    before do
+      stub_ci_pipeline_yaml_file <<-EOS
+        workflow:
+          rules:
+            # do not create pipelines if merge requests are opened
+            - if: $CI_OPEN_MERGE_REQUESTS
+              when: never
+
+            - if: $CI_COMMIT_BRANCH
+
+        rspec:
+          script: echo Hello World
+      EOS
+    end
+
+    context 'when pushing a change' do
+      context 'when a merge request already exists' do
+        let!(:merge_request) do
+          create(:merge_request,
+                 source_project: project,
+                 source_branch: 'feature',
+                 target_project: project,
+                 target_branch: 'master')
+        end
+
+        it 'does not create a pipeline' do
+          expect(pipeline).not_to be_persisted
+        end
+      end
+
+      context 'when no merge request exists' do
+        it 'does create a pipeline' do
+          expect(pipeline.errors).to be_empty
+          expect(pipeline).to be_persisted
+        end
+      end
+    end
+  end
+end