sentry/tests/js/spec/components/settingsBreadcrumbDropdown.spec.jsx

import {mountWithTheme} from 'sentry-test/enzyme';

import BreadcrumbDropdown from 'sentry/views/settings/components/settingsBreadcrumb/breadcrumbDropdown';

jest.useFakeTimers();

describe('Settings Breadcrumb Dropdown', function () {
  let wrapper;
  const selectMock = jest.fn();
  const items = [
    {value: '1', label: 'foo'},
    {value: '2', label: 'bar'},
  ];

  beforeEach(function () {
    wrapper = mountWithTheme(
      <BreadcrumbDropdown items={items} name="Test" hasMenu onSelect={selectMock} />
    );
  });

  it('opens when hovered over crumb', function () {
    wrapper.find('Crumb').simulate('mouseEnter');
    jest.runAllTimers();
    wrapper.update();
    expect(wrapper.find('AutoCompleteItem')).toHaveLength(2);
  });

  it('closes after 200ms when mouse leaves crumb', function () {
    wrapper.find('Crumb').simulate('mouseEnter');
    jest.runAllTimers();
    wrapper.update();
    expect(wrapper.find('StyledDropdownBubble')).toHaveLength(1);

    wrapper.find('Crumb').simulate('mouseLeave');
    jest.advanceTimersByTime(10);
    wrapper.update();
    expect(wrapper.find('StyledDropdownBubble')).toHaveLength(0);
  });

  it('closes immediately after selecting an item', function () {
    wrapper.find('Crumb').simulate('mouseEnter');
    jest.runAllTimers();
    wrapper.update();
    expect(wrapper.find('StyledDropdownBubble')).toHaveLength(1);

    wrapper.find('AutoCompleteItem').first().simulate('click');
    expect(wrapper.find('StyledDropdownBubble')).toHaveLength(0);
  });

  it('stays open when hovered over crumb and then into dropdown menu', function () {
    wrapper.find('Crumb').simulate('mouseEnter');
    jest.runAllTimers();
    wrapper.update();
    expect(wrapper.find('StyledDropdownBubble')).toHaveLength(1);

    wrapper.find('Crumb').simulate('mouseLeave');
    wrapper.find('StyledDropdownBubble').simulate('mouseEnter');
    jest.runAllTimers();
    wrapper.update();
    expect(wrapper.find('StyledDropdownBubble')).toHaveLength(1);
  });

  it('closes after entering dropdown and then leaving dropdown', function () {
    wrapper.find('Crumb').simulate('mouseEnter');
    jest.runAllTimers();
    wrapper.update();
    expect(wrapper.find('StyledDropdownBubble')).toHaveLength(1);

    wrapper.find('Crumb').simulate('mouseLeave');
    wrapper.find('StyledDropdownBubble').simulate('mouseEnter');
    jest.runAllTimers();
    wrapper.update();
    expect(wrapper.find('StyledDropdownBubble')).toHaveLength(1);

    wrapper.find('StyledDropdownBubble').simulate('mouseLeave');
    jest.runAllTimers();
    wrapper.update();
    expect(wrapper.find('StyledDropdownBubble')).toHaveLength(0);
  });
});