pref: add missing mockRestore

components/upload/__tests__/upload.test.js

@@ -379,8 +379,10 @@ describe('Upload', () => {
     );
     const clearIntervalSpy = jest.spyOn(global, 'clearInterval');
     expect(clearIntervalSpy).not.toHaveBeenCalled();
+    clearIntervalSpy.mockRestore();
     wrapper.unmount();
     expect(clearIntervalSpy).toHaveBeenCalled();
+    clearIntervalSpy.mockRestore();
   });
 
   it('corrent dragCls when type is drag', () => {