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index.js
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index.js
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/**
* External dependencies
*/
import TestRenderer from 'react-test-renderer';
/**
* WordPress dependencies
*/
import { Component } from '@wordpress/element';
/**
* Internal dependencies
*/
import withGlobalEvents from '../';
import Listener from '../listener';
jest.mock( '../listener', () => {
const ActualListener = jest.requireActual( '../listener' ).default;
return class extends ActualListener {
constructor() {
super( ...arguments );
this.constructor._instance = this;
jest.spyOn( this, 'add' );
jest.spyOn( this, 'remove' );
}
};
} );
describe( 'withGlobalEvents', () => {
let wrapper;
class OriginalComponent extends Component {
handleResize( event ) {
this.props.onResize( event );
}
render() {
return <div>{ this.props.children }</div>;
}
}
beforeAll( () => {
jest.spyOn( OriginalComponent.prototype, 'handleResize' );
} );
beforeEach( () => {
jest.clearAllMocks();
} );
afterEach( () => {
if ( wrapper ) {
wrapper.unmount();
wrapper = null;
}
} );
function mountEnhancedComponent( props = {} ) {
const EnhancedComponent = withGlobalEvents( {
resize: 'handleResize',
} )( OriginalComponent );
props.ref = () => {};
wrapper = TestRenderer.create(
<EnhancedComponent { ...props }>Hello</EnhancedComponent>
);
}
it( 'renders with original component', () => {
mountEnhancedComponent();
expect( wrapper.root.findByType( 'div' ).children[ 0 ] ).toBe(
'Hello'
);
} );
it( 'binds events from passed object', () => {
mountEnhancedComponent();
// Get the HOC wrapper instance
const hocInstance = wrapper.root.findByType( OriginalComponent ).parent
.instance;
expect( Listener._instance.add ).toHaveBeenCalledWith(
'resize',
hocInstance
);
} );
it( 'handles events', () => {
const onResize = jest.fn();
mountEnhancedComponent( { onResize } );
const event = { type: 'resize' };
Listener._instance.handleEvent( event );
expect( OriginalComponent.prototype.handleResize ).toHaveBeenCalledWith(
event
);
expect( onResize ).toHaveBeenCalledWith( event );
} );
} );