To mock the IonContent for testing, you can create a simple mock class that extends the IonContent class from Ionic. Since you're using Jest as your testing framework, you can leverage jest.fn() to create mock functions for the methods in IonContent that you want to test.
First, create a mock class for IonContent:
class MockIonContent extends IonContent {
scrollToTop: jest.Mock;
scrollToBottom: jest.Mock;
constructor() {
super(null, null); // You might need to pass in required dependencies, if any.
this.scrollToTop = jest.fn();
this.scrollToBottom = jest.fn();
}
}
Now, update your test setup to use this mock class:
describe('MyCustomComponent', () => {
let component: MyCustomComponent;
let fixture: ComponentFixture<MyCustomComponent>;
let mockIonContent: MockIonContent;
beforeEach(() => {
TestBed.configureTestingModule({
imports: [
MyCustomComponent,
IonicModule
]
}).compileComponents();
fixture = TestBed.createComponent(MyCustomComponent);
component = fixture.componentInstance;
mockIonContent = new MockIonContent();
component.content = mockIonContent; // Set the mock IonContent here
fixture.detectChanges();
});
// Your tests go here
});
UPDATED ANSWER BASED ON COMMENTS BELOW:
// MockIonContent class with correct constructor values
class MockIonContent extends IonContent {
scrollToTop: jest.Mock;
scrollToBottom: jest.Mock;
constructor(c: ChangeDetectorRef, r: ElementRef, z: NgZone) {
super(c, r, z);
this.scrollToTop = jest.fn();
this.scrollToBottom = jest.fn();
}
}
And the updated test setup:
describe('MyCustomComponent', () => {
let component: MyCustomComponent;
let fixture: ComponentFixture<MyCustomComponent>;
let mockIonContent: MockIonContent;
beforeEach(() => {
TestBed.configureTestingModule({
imports: [
MyCustomComponent,
IonicModule
]
}).compileComponents();
// Inject the required dependencies for MockIonContent constructor
const changeDetectorRef = TestBed.inject(ChangeDetectorRef);
const elementRef = TestBed.inject(ElementRef);
const ngZone = TestBed.inject(NgZone);
fixture = TestBed.createComponent(MyCustomComponent);
component = fixture.componentInstance;
mockIonContent = new MockIonContent(changeDetectorRef, elementRef, ngZone);
component.content = mockIonContent; // Set the mock IonContent here
fixture.detectChanges();
});
// Your tests go here
});
