Can't resolve all parameters for ApplicationModule: (?)

Question

I just migrated an application module to be an importable library.

I\'m trying to make the tests work correctly, just as they worked before, but I get this error:

Answer 1

You have a dependency in your app module that you did not provide or import in any way. You can determine which by looking at your ApplicationModule constructor method - it likely has some service or similar injected, and you didn't provide it there in imports array of NgModule metadata.