1 files changed, 11 insertions, 0 deletions
diff --git a/spec/frontend/diffs/store/utils_spec.js b/spec/frontend/diffs/store/utils_spec.js
index 6331269d6e8..019ed663d82 100644
--- a/spec/frontend/diffs/store/utils_spec.js
+++ b/spec/frontend/diffs/store/utils_spec.js
@@ -476,6 +476,17 @@ describe('DiffsStoreUtils', () => {
         expect(updatedFilesList).toEqual([mock, fakeNewFile]);
       });
 
+      it('updates diff position', () => {
+        const priorFiles = [mock, { ...mock, file_hash: 'foo', file_path: 'foo' }];
+        const updatedFilesList = utils.prepareDiffData({
+          diff: { diff_files: [mock] },
+          priorFiles,
+          updatePosition: true,
+        });
+
+        expect(updatedFilesList[1].file_hash).toEqual(mock.file_hash);
+      });
+
       it('completes an existing split diff without overwriting existing diffs', () => {
         // The current state has a file that has only loaded inline lines
         const priorFiles = [{ ...mock }];