Angular mock Spec

I am using ng-mocks this way -

import { MockDirective, MockComponent, ngMocks } from 'ng-mocks';

beforeEach(async(() => {
    TestBed.configureTestingModule({
      declarations: [ 
                      MockComponent(ComponentName),

      ],

      schemas:      [ NO_ERRORS_SCHEMA ]

    })
    .compileComponents();
  }));

I am seeing the below error -

Failed: ng-mocks is not in JIT mode and cannot resolve declarations

this issue has been fixed recently. In your case, it means that ComponentName has been imported wrongly, or has a wrong type.

MockComponent accepts classes. Therefore, it should be used like:

import { MockDirective, MockComponent, ngMocks } from 'ng-mocks';

beforeEach(() => {
  TestBed.configureTestingModule({
    declarations: [ 
      MockComponent(ComponentClass), // <- its class instead of its name.
    ],
  }).compileComponents();
}));