chore: adjust path of test utils (#4997)

src/slider/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/slider/test/index.spec.js

@@ -4,7 +4,7 @@ import {
   trigger,
   triggerDrag,
   mockGetBoundingClientRect
-} from '../../../test/utils';
+} from '../../../test';
 
 function mockRect(vertical) {
   return mockGetBoundingClientRect({