| 1 | /** |
| 2 | * Copyright (c) Meta Platforms, Inc. and affiliates. |
| 3 | * |
| 4 | * This source code is licensed under the MIT license found in the |
| 5 | * LICENSE file in the root directory of this source tree. |
| 6 | * |
| 7 | * @flow |
| 8 | */ |
| 9 | |
| 10 | describe('connectToDevTools', () => { |
| 11 | let connectToDevTools; |
| 12 | let hook; |
| 13 | |
| 14 | beforeEach(() => { |
| 15 | jest.resetModules(); |
| 16 | delete window.__REACT_DEVTOOLS_GLOBAL_HOOK__; |
| 17 | |
| 18 | const backend = require('react-devtools-core/src/backend'); |
| 19 | backend.initialize(); |
| 20 | connectToDevTools = backend.connectToDevTools; |
| 21 | hook = window.__REACT_DEVTOOLS_GLOBAL_HOOK__; |
| 22 | }); |
| 23 | |
| 24 | afterEach(() => { |
| 25 | jest.clearAllTimers(); |
| 26 | delete window.__REACT_DEVTOOLS_GLOBAL_HOOK__; |
| 27 | }); |
| 28 | |
| 29 | function createWebSocket(): WebSocket { |
| 30 | return { |
| 31 | CLOSED: 3, |
| 32 | OPEN: 1, |
| 33 | readyState: 1, |
| 34 | send: jest.fn(), |
| 35 | } as any as WebSocket; |
| 36 | } |
| 37 | |
| 38 | it('shuts down cleanly when the WebSocket closes', () => { |
| 39 | const websocket = createWebSocket(); |
| 40 | const onShutdown = jest.fn(); |
| 41 | const unsubscribe = hook.sub('shutdown', onShutdown); |
| 42 | |
| 43 | try { |
| 44 | connectToDevTools({websocket}); |
| 45 | websocket.onopen(); |
| 46 | websocket.readyState = websocket.CLOSED; |
| 47 | websocket.onclose(); |
| 48 | jest.runAllTimers(); |
| 49 | |
| 50 | expect(onShutdown).toHaveBeenCalledTimes(1); |
| 51 | expect(global.consoleWarnMock).not.toHaveBeenCalledWith( |
| 52 | 'Bridge was already shutdown.', |
| 53 | ); |
| 54 | } finally { |
| 55 | unsubscribe(); |
| 56 | } |
| 57 | }); |
| 58 | }); |