fix(core): Testing should not throw when Zone does not patch test FW APIs (#61376)

atscott · thePunderWoman · commit 94f5a4b4d6ee · 2025-05-16T07:53:41.000Z
This prevents `core/testing` from throwing an error if ZoneJS is present but does not patch the test FW APIs such that `fakeAsync` works automatically. For example, there is currently no patching of the vitest APIs, so if you try to use Vitest with Zone on the page, it will throw. PR Close #61376
diff --git a/packages/core/testing/src/fake_async.ts b/packages/core/testing/src/fake_async.ts
@@ -25,7 +25,7 @@ export function resetFakeAsyncZone(): void {
 }
 
 export function resetFakeAsyncZoneIfExists(): void {
-  if (fakeAsyncTestModule) {
+  if (fakeAsyncTestModule && (Zone as any)['ProxyZoneSpec']?.isLoaded()) {
     fakeAsyncTestModule.resetFakeAsyncZone();
   }
 }

Original file line number	Diff line number	Diff line change
`@@ -25,7 +25,7 @@ export function resetFakeAsyncZone(): void {`
`25`	`25`	`}`
`26`	`26`
`27`	`27`	`export function resetFakeAsyncZoneIfExists(): void {`
`28`		`- if (fakeAsyncTestModule) {`
	`28`	`+ if (fakeAsyncTestModule && (Zone as any)['ProxyZoneSpec']?.isLoaded()) {`
`29`	`29`	`fakeAsyncTestModule.resetFakeAsyncZone();`
`30`	`30`	`}`
`31`	`31`	`}`