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import React from 'react';
import { mount } from 'enzyme';
import { sleep } from '../../../tests/utils';
import mountTest from '../../../tests/shared/mountTest';
import rtlTest from '../../../tests/shared/rtlTest';
import BackTop from '..';
describe('BackTop', () => {
mountTest(BackTop);
rtlTest(BackTop);
it('should scroll to top after click it', async () => {
const wrapper = mount(<BackTop visibilityHeight={-1} />);
const scrollToSpy = jest.spyOn(window, 'scrollTo').mockImplementation((x, y) => {
window.scrollY = y;
window.pageYOffset = y;
document.documentElement.scrollTop = y;
});
window.scrollTo(0, 400);
expect(document.documentElement.scrollTop).toBe(400);
wrapper.find('.ant-back-top').simulate('click');
await sleep(500);
expect(document.documentElement.scrollTop).toBe(0);
scrollToSpy.mockRestore();
});
it('support onClick', async () => {
const onClick = jest.fn();
const wrapper = mount(<BackTop onClick={onClick} visibilityHeight={-1} />);
const scrollToSpy = jest.spyOn(window, 'scrollTo').mockImplementation((x, y) => {
window.scrollY = y;
window.pageYOffset = y;
});
document.dispatchEvent(new Event('scroll'));
window.scrollTo(0, 400);
wrapper.find('.ant-back-top').simulate('click');
expect(onClick).toHaveBeenCalled();
scrollToSpy.mockRestore();
});
it('invalid target', async () => {
const onClick = jest.fn();
const wrapper = mount(
<BackTop onClick={onClick} visible target={() => ({ documentElement: {} })} />,
);
wrapper.find('.ant-back-top').simulate('click');
expect(onClick).toHaveBeenCalled();
});
});