Updating LocaleSwitcher to use react-testing-library
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@ -1,34 +1,36 @@
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// Jest Snapshot v1, https://goo.gl/fbAQLP
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exports[`LocaleSwitcher rendering 1`] = `
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<label>
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<Trans>
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Language
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</Trans>
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<div
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className="switcher"
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>
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<select
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onChange={[Function]}
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value="en"
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<DocumentFragment>
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<label>
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<span
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data-component="Trans"
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data-props="{}"
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>
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<option
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key="en"
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value="en"
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Language
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</span>
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<div
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class="switcher"
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>
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<select
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data-testid="language-select"
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>
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English
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</option>
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<option
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key="other"
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value="other"
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>
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Other
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</option>
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</select>
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<ChevronsDown
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color="currentColor"
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size="24"
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/>
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</div>
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</label>
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<option
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value="en"
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>
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English
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</option>
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<option
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value="other"
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>
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Other
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</option>
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</select>
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<span
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data-component="ChevronsDown"
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data-props="{}"
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/>
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</div>
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</label>
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</DocumentFragment>
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`;
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@ -38,7 +38,10 @@ export class LocaleSwitcher extends React.PureComponent {
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return <label>
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<Trans>Language</Trans>
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<div className={ style.switcher }>
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<select value={ current } onChange={ this.handleSelectChange }>
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<select data-testid="language-select"
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value={ current }
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onChange={ this.handleSelectChange }
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>
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{ locales.map(locale => (
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<option value={ locale.code } key={ locale.code }>
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{ locale.name }
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@ -1,5 +1,9 @@
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jest.mock('react-feather/dist/icons/chevrons-down', () =>
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require('__mocks__/component-mock')(
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'react-feather/dist/icons/chevrons-down'));
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import React from 'react';
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import { shallow } from 'enzyme';
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import { render, fireEvent } from 'react-testing-library';
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import i18n from 'i18n';
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import { LocaleSwitcher } from 'components/LocaleSwitcher';
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@ -9,44 +13,47 @@ jest.mock('./locale-to-available', () => jest.fn(() => 'en'));
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describe('LocaleSwitcher', () => {
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test('rendering', () => {
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const component = shallow(
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const { asFragment } = render(
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<LocaleSwitcher />
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);
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expect(component).toMatchSnapshot();
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expect(asFragment()).toMatchSnapshot();
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});
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test('changing language', () => {
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jest.spyOn(i18n, 'changeLanguage');
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const component = shallow(
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const { getByTestId } = render(
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<LocaleSwitcher />
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);
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const selectInput = component.find('select');
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selectInput.value = 'other';
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selectInput.simulate('change', { target: { value: 'other' } });
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const event = new Event('change', { bubbles: true });
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const select = getByTestId('language-select');
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select.value = 'other';
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fireEvent(select, event);
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expect(i18n.changeLanguage).toHaveBeenCalledWith('other');
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});
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test('interface update from language change', () => {
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const component = shallow(
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const { getByTestId } = render(
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<LocaleSwitcher />
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);
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expect(component.find('select').prop('value')).toEqual('en');
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expect(getByTestId('language-select').value).toEqual('en');
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i18n.emit('languageChanged', 'other');
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expect(component.find('select').prop('value')).toEqual('other');
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expect(getByTestId('language-select').value).toEqual('other');
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});
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test('disconnecting event handler on unmount', () => {
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const component = shallow(
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const { unmount } = render(
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<LocaleSwitcher />
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);
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jest.spyOn(component, 'setState');
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jest.spyOn(i18n, 'off');
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component.unmount();
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i18n.emit('languageChanged', 'other');
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expect(component.setState).not.toHaveBeenCalled();
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unmount();
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expect(i18n.off).toHaveBeenCalledWith(
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'languageChanged',
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expect.any(Function));
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});
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});
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