Fixed renamed and mode changed diff viewers

Renders mode changed and renamed file merge request diff
viewers on the frontend.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/52607

1 files changed, 22 insertions, 0 deletions

diff --git a/spec/javascripts/diffs/store/utils_spec.js b/spec/javascripts/diffs/store/utils_spec.js
index d4ef17c5ef8..717f983da65 100644
--- a/spec/javascripts/diffs/store/utils_spec.js
+++ b/spec/javascripts/diffs/store/utils_spec.js
@@ -559,4 +559,26 @@ describe('DiffsStoreUtils', () => {
       ]);
     });
   });
+
+  describe('getDiffMode', () => {
+    it('returns mode when matched in file', () => {
+      expect(
+        utils.getDiffMode({
+          renamed_file: true,
+        }),
+      ).toBe('renamed');
+    });
+
+    it('returns mode_changed if key has no match', () => {
+      expect(
+        utils.getDiffMode({
+          mode_changed: true,
+        }),
+      ).toBe('mode_changed');
+    });
+
+    it('defaults to replaced', () => {
+      expect(utils.getDiffMode({})).toBe('replaced');
+    });
+  });
 });