code-server/test/register.test.ts

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2021-02-12 05:02:49 +07:00
import { JSDOM } from "jsdom"
// Note: we need to import logger from the root
// because this is the logger used in logError in ../src/common/util
import { logger } from "../node_modules/@coder/logger"
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describe("register", () => {
const { window } = new JSDOM()
global.window = (window as unknown) as Window & typeof globalThis
global.document = window.document
global.navigator = window.navigator
global.location = window.location
let spy: jest.SpyInstance
let loggerSpy: jest.SpyInstance
const mockRegisterFn = jest.fn(() => console.log("Mock register fn called"))
beforeAll(() => {
Object.defineProperty(global.navigator, "serviceWorker", {
value: {
register: mockRegisterFn,
},
})
})
beforeEach(() => {
spy = jest.spyOn(global.navigator.serviceWorker, "register")
})
afterEach(() => {
jest.resetModules()
})
afterAll(() => {
jest.restoreAllMocks()
})
it("should register a ServiceWorker", () => {
spy = jest.spyOn(global.navigator.serviceWorker, "register")
// Load service worker like you would in the browser
require("../src/browser/register")
// Load service worker like you would in the browser
// expect spy to have been called
expect(spy).toHaveBeenCalled()
expect(spy).toHaveBeenCalledTimes(1)
spy.mockClear()
})
it("should log an error if something doesn't work", () => {
loggerSpy = jest.spyOn(logger, "error")
const message = "Can't find browser"
const error = new Error(message)
mockRegisterFn.mockImplementation(() => {
throw error
})
// Load service worker like you would in the browser
require("../src/browser/register")
expect(spy).toHaveBeenCalled()
expect(loggerSpy).toHaveBeenCalled()
// expect(loggerSpy).toHaveBeenCalledTimes(1)
// Because we use logError, it will log the prefix along with the error message
// expect(loggerSpy).toHaveBeenCalledWith(`[Service Worker] registration: ${error.message} ${error.stack}`)
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})
})