code-server/test/register.test.ts

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2021-02-11 22:02:49 +00:00
import { JSDOM } from "jsdom"
import { loggerModule } from "./helpers"
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describe("register", () => {
describe("when navigator and serviceWorker are defined", () => {
const mockRegisterFn = jest.fn()
beforeAll(() => {
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
Object.defineProperty(global.navigator, "serviceWorker", {
value: {
register: mockRegisterFn,
},
})
})
beforeEach(() => {
jest.mock("@coder/logger", () => loggerModule)
})
afterEach(() => {
mockRegisterFn.mockClear()
jest.resetModules()
})
afterAll(() => {
jest.restoreAllMocks()
// We don't want these to stay around because it can affect other tests
global.window = (undefined as unknown) as Window & typeof globalThis
global.document = (undefined as unknown) as Document & typeof globalThis
global.navigator = (undefined as unknown) as Navigator & typeof globalThis
global.location = (undefined as unknown) as Location & typeof globalThis
})
it("should register a ServiceWorker", () => {
// Load service worker like you would in the browser
require("../src/browser/register")
expect(mockRegisterFn).toHaveBeenCalled()
expect(mockRegisterFn).toHaveBeenCalledTimes(1)
})
it("should log an error if something doesn't work", () => {
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(mockRegisterFn).toHaveBeenCalled()
expect(loggerModule.logger.error).toHaveBeenCalled()
expect(loggerModule.logger.error).toHaveBeenCalledTimes(1)
expect(loggerModule.logger.error).toHaveBeenCalledWith(
`[Service Worker] registration: ${error.message} ${error.stack}`,
)
})
})
describe("when navigator and serviceWorker are NOT defined", () => {
let spy: jest.SpyInstance
beforeEach(() => {
spy = jest.spyOn(console, "error")
})
afterAll(() => {
jest.restoreAllMocks()
})
it("should log an error to the console", () => {
// Load service worker like you would in the browser
require("../src/browser/register")
expect(spy).toHaveBeenCalled()
expect(spy).toHaveBeenCalledTimes(1)
expect(spy).toHaveBeenCalledWith("[Service Worker] navigator is undefined")
})
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})
})