I was having trouble with cascading AutoCompletes so I split it out into a simple solution.
I started following this example , but then needed to add an initial selected value.
I’ve put my code on Github at https://github.com/aligneddev/AngularAutoCompleteCascading . Please see the readme for more information.
I’ve added an article about using Testing Library with Angular and added tests to this repo.
Check out my Resources Page for referrals that would help me.