feat: add service worker scope and worker script URL to "Mocking enabled" message

src/setupWorker/start/utils/enableMocking.ts

@@ -10,6 +10,10 @@ export async function enableMocking(
 ) {
   context.workerChannel.send('MOCK_ACTIVATE')
   return context.events.once('MOCKING_ENABLED').then(() => {
-    printStartMessage({ quiet: options.quiet })
+    printStartMessage({
+      quiet: options.quiet,
+      workerScope: context.registration?.scope,
+      workerUrl: context.worker?.scriptURL,
+    })
   })
 }

src/setupWorker/start/utils/printStartMessage.test.ts

@@ -14,7 +14,10 @@ afterAll(() => {
 })
 
 test('prints out a default start message into console', () => {
-  printStartMessage()
+  printStartMessage({
+    workerScope: 'http://localhost:3000/',
+    workerUrl: 'http://localhost:3000/worker.js',
+  })
 
   expect(console.groupCollapsed).toHaveBeenCalledWith(
     '%c[MSW] Mocking enabled.',
@@ -32,6 +35,18 @@ test('prints out a default start message into console', () => {
   expect(console.log).toHaveBeenCalledWith(
     'Found an issue? https://github.com/mswjs/msw/issues',
   )
+
+  // Includes service worker scope.
+  expect(console.log).toHaveBeenCalledWith(
+    'Worker scope:',
+    'http://localhost:3000/',
+  )
+
+  // Includes service worker script location.
+  expect(console.log).toHaveBeenCalledWith(
+    'Worker script URL:',
+    'http://localhost:3000/worker.js',
+  )
 })
 
 test('supports printing a custom start message', () => {
@@ -49,3 +64,25 @@ test('does not print any messages when log level is quiet', () => {
   expect(console.groupCollapsed).not.toHaveBeenCalled()
   expect(console.log).not.toHaveBeenCalled()
 })
+
+test('prints a worker scope in the start message', () => {
+  printStartMessage({
+    workerScope: 'http://localhost:3000/user',
+  })
+
+  expect(console.log).toHaveBeenCalledWith(
+    'Worker scope:',
+    'http://localhost:3000/user',
+  )
+})
+
+test('prints a worker script url in the start message', () => {
+  printStartMessage({
+    workerUrl: 'http://localhost:3000/mockServiceWorker.js',
+  })
+
+  expect(console.log).toHaveBeenCalledWith(
+    'Worker script URL:',
+    'http://localhost:3000/mockServiceWorker.js',
+  )
+})

src/setupWorker/start/utils/printStartMessage.ts

@@ -1,8 +1,10 @@
 import { devUtils } from '../../../utils/internal/devUtils'
 
-interface PrintStartMessageArgs {
+export interface PrintStartMessageArgs {
   quiet?: boolean
   message?: string
+  workerUrl?: string
+  workerScope?: string
 }
 
 /**
@@ -25,5 +27,14 @@ export function printStartMessage(args: PrintStartMessageArgs = {}) {
     'font-weight:normal',
   )
   console.log('Found an issue? https://github.com/mswjs/msw/issues')
+
+  if (args.workerUrl) {
+    console.log('Worker script URL:', args.workerUrl)
+  }
+
+  if (args.workerScope) {
+    console.log('Worker scope:', args.workerScope)
+  }
+
   console.groupEnd()
 }

test/msw-api/setup-worker/start/start.test.ts

@@ -57,3 +57,25 @@ test('resolves the "start" Promise when the worker has been activated', async ()
   expect(events[2]).toEqual('enabled message')
   expect(events).toHaveLength(3)
 })
+
+test('prints the start message when the worker has been registered', async () => {
+  const runtime = await pageWith({
+    example: path.resolve(__dirname, 'start.mocks.ts'),
+    routes(app) {
+      app.get('/worker.js', (req, res) => {
+        res.sendFile(path.resolve(__dirname, 'worker.delayed.js'))
+      })
+    },
+  })
+
+  await runtime.page.evaluate(() => {
+    return window.msw.startWorker()
+  })
+
+  expect(runtime.consoleSpy.get('log')).toContain(
+    `Worker scope: ${runtime.makeUrl('/')}`,
+  )
+  expect(runtime.consoleSpy.get('log')).toContain(
+    `Worker script URL: ${runtime.makeUrl('/worker.js')}`,
+  )
+})