ReactJS

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import React from "react";
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import Enzyme, {shallow} from 'enzyme';
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import Adapter from '@wojtekmaj/enzyme-adapter-react-17';
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import {Dropdown} from "../Dropdown";
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Enzyme.configure({adapter: new Adapter()});
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describe('Dropdown', () => {
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  test('Should render', () => {
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    const wrapper = shallow(<Dropdown children={<div/>} button={<button/>}/>);
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    expect(wrapper).toBeDefined();
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    expect(wrapper.find('button').isEmptyRender()).toBeFalsy();
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  })
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  test('should render(snapshot)', () => {
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    const wrapper = shallow(<Dropdown children={<div/>} button={<button/>}/>);
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    expect(wrapper).toMatchSnapshot();
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  })
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})