test(vue-query/useMutation): add test for 'throw' from error watcher when 'throwOnError' returns true (#10239)

Author: sukvvon

packages/vue-query/src/__tests__/useMutation.test.ts

@@ -420,5 +420,27 @@ describe('useMutation', () => {
       expect(boundaryFn).toHaveBeenCalledTimes(1)
       expect(boundaryFn).toHaveBeenCalledWith(err)
     })
+
+    test('should throw from error watcher when throwOnError returns true', async () => {
+      const throwOnErrorFn = vi.fn().mockReturnValue(true)
+      const { mutate } = useMutation({
+        mutationFn: () =>
+          sleep(10).then(() => Promise.reject(new Error('Some error'))),
+        throwOnError: throwOnErrorFn,
+      })
+
+      mutate()
+
+      // Suppress the Unhandled Rejection caused by watcher throw in Vue 3
+      const rejectionHandler = () => {}
+      process.on('unhandledRejection', rejectionHandler)
+
+      await vi.advanceTimersByTimeAsync(10)
+
+      process.off('unhandledRejection', rejectionHandler)
+
+      expect(throwOnErrorFn).toHaveBeenCalledTimes(1)
+      expect(throwOnErrorFn).toHaveBeenCalledWith(Error('Some error'))
+    })
   })
 })