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

To find out what's really causing the error, disable source maps:

For angular-cli >= v6.x:

ng test --source-map=false

For angular-cli v1.x:

ng test -sm=false

You will then see a better error, e.g. "Cannot read property 'x' of undefined" in the actual source file that's causing the error. For some reason, there's a bug with sourcemaps right now in testing, and you just get this cryptic error.