/** * 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. * * @format * @emails oncall+react_native */ 'use strict'; describe('logError', () => { const logError = require('../logError'); it('logs error messages to the console', () => { console.error.apply = jest.fn(); logError('This is a log message'); expect(console.error.apply).toHaveBeenCalledWith(console, [ 'This is a log message', ]); }); it('logs error messages with multiple arguments to the console', () => { console.error.apply = jest.fn(); const data = 'log'; logError('This is a', data, 'message'); expect(console.error.apply).toHaveBeenCalledWith(console, [ 'This is a', 'log', 'message', ]); }); it('logs errors to the console', () => { console.error = jest.fn(); logError(new Error('The error message')); expect(console.error.mock.calls[0][0]).toContain( 'Error: "The error message". Stack:', ); }); });