chore: adjust path of test utils (#4997)

src/cell/test/demo.spec.js

@@ -1,4 +1,4 @@
 import Demo from '../demo';
-import demoTest from '../../../test/demo-test';
+import { snapshotDemo } from '../../../test/demo';
 
-demoTest(Demo);
+snapshotDemo(Demo);

src/cell/test/index.spec.js

@@ -1,6 +1,6 @@
 import Cell from '..';
 import CellGroup from '../../cell-group';
-import { mount } from '../../../test/utils';
+import { mount } from '../../../test';
 
 test('click event', () => {
   const click = jest.fn();