Call retries were exceeded at ChildProcessWorker.initialize thrown while running ng test (Angular) with Jest

Question

I am using Angular with Jest. While running ng test (nx test in my case because I am using nrwl/nx), I got this error for a component while the last test was hanging:

Call retries were exceeded at ChildProcessWorker.initialize

Answer 1

I later found out that I had a setTimeout in my AfterViewInit() hook and this caused the error.

If you have a timer in your component, do the following in order to fix it:

• have a look on this answer: Test a function that contains a setTimeout()
• look on the documentation and on this article to see how to use fakeAsync() and tick() for testing async code
• if that doesn't work, wrap you test case in a setTimeout() with the same number of milliseconds as the on in the component and that should do the trick