1 files changed, 31 insertions, 0 deletions
diff --git a/spec/frontend/diffs/utils/merge_request_spec.js b/spec/frontend/diffs/utils/merge_request_spec.js
new file mode 100644
index 00000000000..8c7b1e1f2a5
--- /dev/null
+++ b/spec/frontend/diffs/utils/merge_request_spec.js
@@ -0,0 +1,31 @@
+import { getDerivedMergeRequestInformation } from '~/diffs/utils/merge_request';
+import { diffMetadata } from '../mock_data/diff_metadata';
+
+describe('Merge Request utilities', () => {
+  const derivedMrInfo = {
+    mrPath: '/gitlab-org/gitlab-test/-/merge_requests/4',
+    userOrGroup: 'gitlab-org',
+    project: 'gitlab-test',
+    id: '4',
+  };
+  const unparseableEndpoint = {
+    mrPath: undefined,
+    userOrGroup: undefined,
+    project: undefined,
+    id: undefined,
+  };
+
+  describe('getDerivedMergeRequestInformation', () => {
+    const endpoint = `${diffMetadata.latest_version_path}.json?searchParam=irrelevant`;
+
+    it.each`
+      argument                   | response
+      ${{ endpoint }}            | ${derivedMrInfo}
+      ${{}}                      | ${unparseableEndpoint}
+      ${{ endpoint: undefined }} | ${unparseableEndpoint}
+      ${{ endpoint: null }}      | ${unparseableEndpoint}
+    `('generates the correct derived results based on $argument', ({ argument, response }) => {
+      expect(getDerivedMergeRequestInformation(argument)).toStrictEqual(response);
+    });
+  });
+});