angularjestjsnrwl-nxngxsangular-unit-test

NgxsFeatureModule does not have a module def (ɵmod property)

Running NX mono repo and Angular

"@nrwl/angular": "15.2.4",
"@angular/core": "~15.0.0",
"@ngxs/store": "^3.7.6",
"jest": "28.1.1",
"@nrwl/jest": "15.2.4",

The exciting part is, the component I am testing has nothing to do with Ngxs and spec file is simple.

describe('OperationPlanTaskFormComponent', () => {
let component: OperationPlanTaskFormComponent;
let fixture: ComponentFixture<OperationPlanTaskFormComponent>;

beforeEach(async () => {
    await TestBed.configureTestingModule({
        declarations: [OperationPlanTaskFormComponent],
        imports: [
            ButtonModule,
            ConfirmDialogModule,
        ]
    }).compileComponents();

    fixture = TestBed.createComponent(OperationPlanTaskFormComponent);
    component = fixture.componentInstance;
    fixture.detectChanges();
});

it('should create', () => {
    expect(component).toBeTruthy();
});

});

So, when I run test file for this it shows error "NgxsFeatureModule does not have a module def (ɵmod property)"

enter image description here

Tried deleting node_modules folder and clean install with npm ci. Tried delete .angular and including the cache. Even tried nx reset. No luck. I am sure that the component I am trying to test doesn't have any dependency which can cause this issue.

I would really appreciate if anyone has any idea about what is actually going on.

Solution

  • I found a workaround for the issue. Update package.json and add -

    "postinstall-ng": "ngcc",

    in scripts. Then run it

    npm run postinstall-ng

    What it does is

    enter image description here

    So, it basically changes the legacy library compatible with runtime IVY.

    The ngcc (Angular Compatibility Compiler) is a tool used to compile Angular libraries that have been published in the legacy format, which is not compatible with the Angular Ivy runtime, to a format that is compatible with Ivy.

    ref https://iq.js.org/questions/angular/what-is-ngcc

    Finally, my two cents is - ngxs library got some issues. They need to provide Ivy distribution.