test.spec.ts

import { Injectable, NgModule } from '@angular/core';
import {
  MockBuilder,
  MockRender,
  NgModuleWithProviders,
} from 'ng-mocks';

@Injectable()
class TargetService {
  public readonly name = 'target';
}

@NgModule()
class TargetModule {
  public static forRoot(): NgModuleWithProviders<TargetModule> {
    return {
      ngModule: TargetModule,
      providers: [TargetService],
    };
  }
}

@NgModule({
  imports: [TargetModule.forRoot()],
})
class AppModule {}

describe('issue-271', () => {
  beforeEach(() =>
    MockBuilder(null, AppModule).exclude(TargetModule),
  );

  it('excludes modules with providers', () => {
    expect(() => MockRender(TargetService)).toThrowError(
      /No provider for TargetService/,
    );
  });
});