/
InvalidEventListeners-test.js
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/
InvalidEventListeners-test.js
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/**
* Copyright (c) Facebook, Inc. and its affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
* @emails react-core
*/
'use strict';
jest.mock('../events/isEventSupported');
describe('InvalidEventListeners', () => {
let React;
let ReactDOM;
let container;
beforeEach(() => {
jest.resetModules();
React = require('react');
ReactDOM = require('react-dom');
container = document.createElement('div');
document.body.appendChild(container);
});
afterEach(() => {
document.body.removeChild(container);
container = null;
});
it('should prevent non-function listeners, at dispatch', () => {
let node;
expect(() => {
node = ReactDOM.render(<div onClick="not a function" />, container);
}).toErrorDev(
'Expected `onClick` listener to be a function, instead got a value of `string` type.',
);
const uncaughtErrors = [];
function handleWindowError(e) {
uncaughtErrors.push(e.error);
}
window.addEventListener('error', handleWindowError);
try {
node.dispatchEvent(
new MouseEvent('click', {
bubbles: true,
}),
);
} finally {
window.removeEventListener('error', handleWindowError);
}
expect(uncaughtErrors.length).toBe(1);
expect(uncaughtErrors[0]).toEqual(
expect.objectContaining({
message:
'Expected `onClick` listener to be a function, ' +
'instead got a value of `string` type.',
}),
);
});
it('should not prevent null listeners, at dispatch', () => {
const node = ReactDOM.render(<div onClick={null} />, container);
node.dispatchEvent(
new MouseEvent('click', {
bubbles: true,
}),
);
});
});