Add graceful error handling for Chrome kill failures on Windows 11

Co-authored-by: lirantal <316371+lirantal@users.noreply.github.com>

Author: Copilot

__tests__/Audit.test.js

@@ -1,12 +1,12 @@
 jest.mock('lighthouse')
+
+const mockKill = jest.fn()
 jest.mock('chrome-launcher', () => {
   return {
     launch() {
       return {
         port: '1234',
-        kill() {
-          return null
-        }
+        kill: mockKill
       }
     }
   }
@@ -16,6 +16,16 @@ const lighthouse = require('lighthouse')
 const { Audit } = require('../index')
 
 describe('Audit', () => {
+  beforeEach(() => {
+    jest.clearAllMocks()
+    mockKill.mockResolvedValue(null)
+    lighthouse.mockResolvedValue({
+      lhr: {
+        audits: {}
+      }
+    })
+  })
+
   test('Instantiation of audit with no settings should default to reasonable scan', async () => {
     const audit = new Audit()
     expect(audit.settings).toEqual({
@@ -50,6 +60,22 @@ describe('Audit', () => {
     await audit.scanUrl(url, opts)
 
     expect(lighthouse.mock.calls[0][0]).toBe(url)
-    expect(lighthouse.mock.calls[1][1]).toHaveProperty('emulatedFormFactor', 'mobile')
+    // The device option is passed as the second parameter to lighthouse
+    expect(lighthouse.mock.calls[0][1]).toHaveProperty('emulatedFormFactor', 'mobile')
+  })
+
+  test('should handle Chrome kill errors gracefully', async () => {
+    const url = 'https://abc.com'
+
+    // Mock chrome kill to throw an error (like on Windows 11)
+    mockKill.mockRejectedValueOnce(new Error('Chrome could not be killed Command failed: taskkill /pid 15132 /T /F'))
+
+    const audit = new Audit()
+
+    // This should not throw an error even when chrome kill fails
+    await expect(audit.scanUrl(url)).resolves.toBeDefined()
+
+    // Verify that kill was attempted
+    expect(mockKill).toHaveBeenCalled()
   })
 })

src/Audit.js

@@ -98,7 +98,12 @@ module.exports = class Audit {
         )}`
       )
 
-    await chromeInstance.kill()
+    try {
+      await chromeInstance.kill()
+    } catch (error) {
+      // Chrome process may have already exited, which is the desired outcome
+      debug(`Chrome kill warning: ${error.message}`)
+    }
     return scanResult
   }
 }