ant-design/components/auto-complete/__tests__/index.test.js

import React from 'react';
import { mount } from 'enzyme';
import AutoComplete from '..';

describe('AutoComplete with Custom Input Element Render', () => {
  it('AutoComplete with custom Input render perfectly', () => {
    const wrapper = mount(
      <AutoComplete dataSource={['12345', '23456', '34567']}>
        <textarea />
      </AutoComplete>,
    );

    expect(wrapper.find('textarea').length).toBe(1);
    wrapper.find('textarea').simulate('change', { target: { value: '123' } });
    const dropdownWrapper = mount(
      wrapper
        .find('Trigger')
        .instance()
        .getComponent(),
    );

    // should not filter data source defaultly
    expect(dropdownWrapper.find('MenuItem').length).toBe(3);
  });

  it('AutoComplete should work when dataSource is object array', () => {
    const wrapper = mount(
      <AutoComplete dataSource={[{ text: 'text', value: 'value' }, { text: 'abc', value: 'xxx' }]}>
        <input />
      </AutoComplete>,
    );
    expect(wrapper.find('input').length).toBe(1);
    wrapper.find('input').simulate('change', { target: { value: 'a' } });
    const dropdownWrapper = mount(
      wrapper
        .find('Trigger')
        .instance()
        .getComponent(),
    );

    // should not filter data source defaultly
    expect(dropdownWrapper.find('MenuItem').length).toBe(2);
  });

  it('AutoComplete throws error when contains invalid dataSource', () => {
    jest.spyOn(console, 'error').mockImplementation(() => undefined);
    expect(() => {
      mount(
        <AutoComplete dataSource={[() => {}]}>
          <textarea />
        </AutoComplete>,
      );
    }).toThrow();
    // eslint-disable-next-line no-console
    console.error.mockRestore();
  });
});