refactor(wip): register module

Author: jsjoeio

src/browser/register.ts

@@ -1,10 +1,12 @@
-import { getOptions, Options, normalize, logError } from "../common/util"
+import { getOptions, normalize, logError } from "../common/util"
 
 import "./pages/error.css"
 import "./pages/global.css"
 import "./pages/login.css"
 
-export async function registerServiceWorker(navigator: Navigator, path: string, options: Options): Promise<void> {
+async function registerServiceWorker(): Promise<void> {
+  const options = getOptions()
+  const path = normalize(`${options.csStaticBase}/dist/serviceWorker.js`)
   try {
     await navigator.serviceWorker.register(path, {
       scope: (options.base ?? "") + "/",
@@ -15,23 +17,8 @@ export async function registerServiceWorker(navigator: Navigator, path: string,
   }
 }
 
-interface HandleServiceWorkerRegistration {
-  getOptions: () => Options
-  normalize: (url: string, keepTrailing?: boolean) => string
-  registerServiceWorker: (navigator: Navigator, path: string, options: Options) => Promise<void>
+if (typeof navigator !== "undefined" && "serviceWorker" in navigator) {
+  registerServiceWorker()
+} else {
+  console.error(`[Service Worker] navigator is undefined`)
 }
-
-export function handleServiceWorkerRegistration({
-  getOptions,
-  normalize,
-  registerServiceWorker,
-}: HandleServiceWorkerRegistration): void {
-  if (typeof navigator !== "undefined" && "serviceWorker" in navigator) {
-    const options = getOptions()
-    const path = normalize(`${options.csStaticBase}/dist/serviceWorker.js`)
-    registerServiceWorker(navigator, path, options)
-  }
-}
-
-// Written this way so that it's easier to test
-handleServiceWorkerRegistration({ getOptions, normalize, registerServiceWorker })

test/register.test.ts

@@ -2,130 +2,63 @@ 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"
-import { registerServiceWorker, handleServiceWorkerRegistration } from "../src/browser/register"
-import { Options } from "../src/common/util"
-const { window } = new JSDOM()
-global.window = (window as unknown) as Window & typeof globalThis
-global.document = window.document
-global.navigator = window.navigator
 
 describe("register", () => {
-  describe("registerServiceWorker", () => {
-    let spy: jest.SpyInstance
-    let loggerSpy: jest.SpyInstance
-
-    beforeAll(() => {
-      Object.defineProperty(global.navigator, "serviceWorker", {
-        value: {
-          register: () => {
-            return "hello"
-          },
+  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
+
+  beforeAll(() => {
+    Object.defineProperty(global.navigator, "serviceWorker", {
+      value: {
+        register: () => {
+          return "hello"
         },
-      })
-    })
-
-    beforeEach(() => {
-      loggerSpy = jest.spyOn(logger, "error")
-      spy = jest.spyOn(global.navigator.serviceWorker, "register")
-    })
-
-    afterEach(() => {
-      jest.resetAllMocks()
-    })
-
-    afterAll(() => {
-      jest.restoreAllMocks()
-    })
-
-    it("should register a ServiceWorker", () => {
-      const path = "/hello"
-      const mockOptions = {
-        base: "",
-        csStaticBase: "",
-        logLevel: 0,
-      }
-      registerServiceWorker(navigator, path, mockOptions)
-      // expect spy to have been called
-      expect(spy).toHaveBeenCalled()
-      expect(spy).toHaveBeenCalledTimes(1)
-    })
-
-    it("should log an error if something doesn't work", () => {
-      const message = "Can't find browser"
-      const error = new Error(message)
-      const path = "/hello"
-      const mockOptions = {
-        base: "",
-        csStaticBase: "",
-        logLevel: 0,
-      }
-      global.navigator.serviceWorker.register = () => {
-        throw error
-      }
-
-      registerServiceWorker(navigator, path, mockOptions)
-      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}`)
+      },
     })
+  })
 
-    it("should work when base is undefined", () => {
-      const path = "/hello"
-
-      // We want to test some code that checks if options.base is undefined
-      // so we leave it off mockOptions
-      // but assert it as Options so TS is happy
-      const mockOptions = {
-        csStaticBase: "",
-        logLevel: 0,
-      } as Options
-      registerServiceWorker(navigator, path, mockOptions)
-      // expect spy to have been called
-      expect(spy).toHaveBeenCalled()
-      expect(spy).toHaveBeenCalledTimes(1)
-    })
+  beforeEach(() => {
+    spy = jest.spyOn(global.navigator.serviceWorker, "register")
+    loggerSpy = jest.spyOn(logger, "error")
   })
 
-  describe("handleServiceWorkerRegistration", () => {
-    let getOptionsMock: jest.MockedFunction<() => {
-      base: string
-      csStaticBase: string
-      logLevel: number
-    }>
-    let normalizeMock: jest.MockedFunction<(v: string) => string>
-    let registerServiceWorkerMock: jest.MockedFunction<(
-      navigator: Navigator,
-      path: string,
-      mockOptions: Options,
-    ) => Promise<void>>
+  afterEach(() => {
+    jest.resetModules()
+    jest.resetAllMocks()
+  })
 
-    beforeEach(() => {
-      getOptionsMock = jest.fn(() => ({
-        base: "",
-        csStaticBase: "",
-        logLevel: 0,
-      }))
+  afterAll(() => {
+    jest.restoreAllMocks()
+  })
 
-      normalizeMock = jest.fn((url: string) => "qux///")
+  it("should register a ServiceWorker", () => {
+    // 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)
+  })
 
-      registerServiceWorkerMock = jest
-        .fn()
-        .mockImplementation((navigator: Navigator, path: string, mockOptions: Options) => Promise.resolve())
-    })
-    it("should work when called", () => {
-      handleServiceWorkerRegistration({
-        getOptions: getOptionsMock,
-        normalize: normalizeMock,
-        registerServiceWorker: registerServiceWorkerMock,
-      })
+  it("should log an error if something doesn't work", () => {
+    const message = "Can't find browser"
+    const error = new Error(message)
+    global.navigator.serviceWorker.register = () => {
+      throw error
+    }
 
-      const mocks = [getOptionsMock, normalizeMock, registerServiceWorkerMock]
+    // Load service worker like you would in the browser
+    require("../src/browser/register")
 
-      mocks.forEach((mock) => {
-        expect(mock).toHaveBeenCalled()
-        expect(mock).toHaveBeenCalledTimes(1)
-      })
-    })
+    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}`)
   })
 })