vant/src/cascader/test/index.spec.js

import Cascader from '..';
import { mount, later } from '../../../test';
import options from '../demo/area-en-US';

test('should emit change event when active option changed', async () => {
  const wrapper = mount(Cascader, {
    propsData: {
      options,
    },
  });

  await later();
  wrapper.find('.van-cascader__option').trigger('click');

  const firstOption = options[0];
  expect(wrapper.emitted('change')[0]).toEqual([
    {
      value: firstOption.value,
      tabIndex: 0,
      selectedOptions: [firstOption],
    },
  ]);

  await later();
  wrapper
    .findAll('.van-cascader__options')
    .at(1)
    .find('.van-cascader__option')
    .trigger('click');
  const secondOption = options[0].children[0];
  expect(wrapper.emitted('change')[1]).toEqual([
    {
      value: secondOption.value,
      tabIndex: 1,
      selectedOptions: [firstOption, secondOption],
    },
  ]);
});

test('should emit finish event when all options is selected', async () => {
  const option = { value: '1', text: 'foo' };
  const wrapper = mount(Cascader, {
    propsData: {
      options: [option],
    },
  });

  await later();
  wrapper.find('.van-cascader__option').trigger('click');
  expect(wrapper.emitted('finish')[0]).toEqual([
    {
      value: option.value,
      tabIndex: 0,
      selectedOptions: [option],
    },
  ]);
});

test('should emit close event when close icon is clicked', () => {
  const wrapper = mount(Cascader);
  wrapper.find('.van-cascader__close-icon').trigger('click');
  expect(wrapper.emitted('close')[0]).toBeTruthy();
});

test('should not render close icon when closeable is false', () => {
  const wrapper = mount(Cascader, {
    propsData: {
      closeable: false,
    },
  });
  expect(wrapper.contains('.van-cascader__close-icon')).toBeFalsy();
});

test('should render title slot correctly', () => {
  const wrapper = mount(Cascader, {
    scopedSlots: {
      title: () => 'Custom Title',
    },
  });
  expect(wrapper.find('.van-cascader__title').html()).toMatchSnapshot();
});

test('should select correct option when value changed', async () => {
  const wrapper = mount(Cascader, {
    propsData: {
      options,
    },
  });

  await later();
  wrapper.setProps({ value: '330304' });
  await later();
  const selectedOptions = wrapper.findAll('.van-cascader__option--selected');
  const lastSelectedOption = selectedOptions.at(selectedOptions.length - 1);
  expect(lastSelectedOption).toMatchSnapshot();
});