refactor: move unit tests to test/unit

test/unit/register.test.ts

@@ -0,0 +1,87 @@
+import { JSDOM } from "jsdom"
+import { loggerModule } from "../utils/helpers"
+
+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")
+    })
+  })
+})