added unit test for getting GIF fragment with .gif extension

tests/unit/get.test.js

@@ -662,5 +662,29 @@ describe('GET /v1/fragments/:id.ext', () => {
       expect(receivedMetadata).toEqual(originalMetadata);
       expect(Buffer.compare(receivedFileContent, fileContent)).toBe(0);
     });
+
+    test('GIF fragments data is returned in if GIF fragment ID is passed with .gif extension', async () => {
+      // post a fragment
+      const filePath = path.join(__dirname, '..', 'files', 'file.gif');
+      const fileContent = fs.readFileSync(filePath);
+      const ownerId = hash('[email protected]');
+      const id = 'rdmId';
+      const type = 'image/gif';
+      const fragMetadata1 = new Fragment({ id: id, ownerId: ownerId, type: type });
+      fragMetadata1.setData(fileContent);
+      fragMetadata1.save();
+
+      const res = await request(app)
+        .get(`/v1/fragments/${id}.gif`)
+        .auth('[email protected]', 'password1');
+      expect(res.statusCode).toBe(200);
+      const receivedFileContent = res.body;
+
+      const receivedMetadata = await sharp(receivedFileContent).metadata();
+      const originalMetadata = await sharp(fileContent).metadata();
+
+      expect(receivedMetadata).toEqual(originalMetadata);
+      expect(Buffer.compare(receivedFileContent, fileContent)).toBe(0);
+    });
   });
 });