1 files changed, 63 insertions, 0 deletions
diff --git a/spec/frontend/snippets/utils/blob_spec.js b/spec/frontend/snippets/utils/blob_spec.js
new file mode 100644
index 00000000000..c20cf2e6102
--- /dev/null
+++ b/spec/frontend/snippets/utils/blob_spec.js
@@ -0,0 +1,63 @@
+import { cloneDeep } from 'lodash';
+import { decorateBlob, createBlob, diffAll } from '~/snippets/utils/blob';
+import { testEntries, createBlobsFromTestEntries } from '../test_utils';
+
+jest.mock('lodash/uniqueId', () => arg => `${arg}fakeUniqueId`);
+
+const TEST_RAW_BLOB = {
+  rawPath: '/test/blob/7/raw',
+};
+
+describe('~/snippets/utils/blob', () => {
+  describe('decorateBlob', () => {
+    it('should decorate the given object with local blob properties', () => {
+      const orig = cloneDeep(TEST_RAW_BLOB);
+
+      expect(decorateBlob(orig)).toEqual({
+        ...TEST_RAW_BLOB,
+        id: 'blob_local_fakeUniqueId',
+        isLoaded: false,
+        content: '',
+      });
+    });
+  });
+
+  describe('createBlob', () => {
+    it('should create an empty local blob', () => {
+      expect(createBlob()).toEqual({
+        id: 'blob_local_fakeUniqueId',
+        isLoaded: true,
+        content: '',
+        path: '',
+      });
+    });
+  });
+
+  describe('diffAll', () => {
+    it('should create diff from original files', () => {
+      const origBlobs = createBlobsFromTestEntries(
+        [
+          testEntries.deleted,
+          testEntries.updated,
+          testEntries.renamed,
+          testEntries.renamedAndUpdated,
+        ],
+        true,
+      );
+      const blobs = createBlobsFromTestEntries([
+        testEntries.created,
+        testEntries.updated,
+        testEntries.renamed,
+        testEntries.renamedAndUpdated,
+      ]);
+
+      expect(diffAll(blobs, origBlobs)).toEqual([
+        testEntries.deleted.diff,
+        testEntries.created.diff,
+        testEntries.updated.diff,
+        testEntries.renamed.diff,
+        testEntries.renamedAndUpdated.diff,
+      ]);
+    });
+  });
+});