ant-design/components/slider/__tests__/index.test.js

import React from 'react';
import { render, mount } from 'enzyme';
import Slider from '..';

describe('Slider', () => {
  it('should show tooltip when hovering slider handler', () => {
    const wrapper = mount(
      <Slider defaultValue={30} />
    );
    wrapper.find('.ant-slider-handle').at(0).simulate('mouseEnter');
    expect(render(wrapper.find('Trigger').instance().getComponent())).toMatchSnapshot();
    wrapper.find('.ant-slider-handle').at(0).simulate('mouseLeave');
    expect(render(wrapper.find('Trigger').instance().getComponent())).toMatchSnapshot();
  });

  it('when tooltipVisible is true, tooltip should show always, or should never show', () => {
    let wrapper = mount(<Slider defaultValue={30} tooltipVisible />);
    expect(wrapper.find('.ant-tooltip-content').at(0).hasClass('ant-tooltip-hidden')).toBe(false);
    wrapper.find('.ant-slider-handle').at(0).simulate('mouseEnter');
    expect(wrapper.find('.ant-tooltip-content').at(0).hasClass('ant-tooltip-hidden')).toBe(false);
    wrapper.find('.ant-slider-handle').at(0).simulate('click');
    expect(wrapper.find('.ant-tooltip-content').at(0).hasClass('ant-tooltip-hidden')).toBe(false);
    wrapper = mount(<Slider defaultValue={30} tooltipVisible={false} />);
    expect(wrapper.find('.ant-tooltip-content').length).toBe(0);
  });
});