import { createMemoryHistory } from 'history'; import React from 'react'; import { cleanup, render, waitFor, fireEvent } from '@testing-library/react'; import MessageInput from './MessageInput'; describe('MessageInput;', () => { afterEach(cleanup); it('triggers callback on send button click', async () => { const onSendMessage = jest.fn(() => {}); { const { container, getByTestId } = render( ); const messageInput = getByTestId('message-input'); const sendButton = getByTestId('send-button'); fireEvent.change(messageInput, { target: { value: 'foo' } }); await waitFor(() => messageInput); fireEvent.click(sendButton); await waitFor(() => expect(onSendMessage.mock.calls.length).toBe(1)); } }); it('triggers callback on Enter press', async () => { const onSendMessage = jest.fn(() => {}); { const { container, getByTestId } = render( ); const messageInput = getByTestId('message-input'); fireEvent.change(messageInput, { target: { value: 'foo' } }); await waitFor(() => messageInput); fireEvent.keyPress(messageInput, { key: 'Enter', code: 13, charCode: 13, }); await waitFor(() => expect(onSendMessage.mock.calls.length).toBe(1)); } }); });