Angular 2 unit testing - getting error Failed to load 'ng:///DynamicTestModule/module.ngfactory.js'

Question

I have angular 2 webpack application, all webpack,karma configuration created as per angular.io webpack guide. I am not using aot. I am writing jasmine unit test spec to te

Answer 1

I was bitten by the same error next day - this time the problem was buried in the HTML file. Using a simple array length test for *ngIf

had to be refactored into

with a getter as in:

get myArrayNotEmpty(){
  return this.myArray && this.myArray.length > 0;
}

I am a bit irritated though that such a variety of causes is covered by one very misleading and unhelpful message.