1 files changed, 33 insertions, 0 deletions
diff --git a/spec/lib/gitlab/patch/action_dispatch_journey_formatter_spec.rb b/spec/lib/gitlab/patch/action_dispatch_journey_formatter_spec.rb
new file mode 100644
index 00000000000..5f0e1f40231
--- /dev/null
+++ b/spec/lib/gitlab/patch/action_dispatch_journey_formatter_spec.rb
@@ -0,0 +1,33 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Gitlab::Patch::ActionDispatchJourneyFormatter do
+  let(:group) { create(:group) }
+  let(:project) { create(:project, namespace: group) }
+  let(:pipeline) { create(:ci_empty_pipeline, project: project) }
+  let(:url) { Gitlab::Routing.url_helpers.project_pipeline_url(project, pipeline) }
+  let(:expected_path) { "#{project.full_path}/pipelines/#{pipeline.id}" }
+
+  context 'custom implementation of #missing_keys' do
+    before do
+      expect_any_instance_of(Gitlab::Patch::ActionDispatchJourneyFormatter).to receive(:missing_keys)
+    end
+
+    it 'generates correct url' do
+      expect(url).to end_with(expected_path)
+    end
+  end
+
+  context 'original implementation of #missing_keys' do
+    before do
+      allow_any_instance_of(Gitlab::Patch::ActionDispatchJourneyFormatter).to receive(:missing_keys) do |instance, route, parts|
+        instance.send(:old_missing_keys, route, parts) # test the old implementation
+      end
+    end
+
+    it 'generates correct url' do
+      expect(url).to end_with(expected_path)
+    end
+  end
+end