I have a DialogComponent that has the following constructor where Dialog is a custom object:
constructor(
public dialogRef: MatDialogRef<CustomDialogComponent>,
@Inject(MAT_DIALOG_DATA) public data: Dialog
)
I created the following TestBed in Angular4:
data = new Dialog()
data.message = 'Dialog Message'
TestBed.configureTestingModule({
imports: [MaterialModules],
declarations: [CustomDialogComponent],
providers: [MatDialogRef, { provide: Dialog, useValue: data }]
})
TestBed.overrideModule(BrowserDynamicTestingModule, {
set: {
entryComponents: [CustomDialogComponent]
}
})
await TestBed.compileComponents()
But I get the following error:
Failed: Can't resolve all parameters for MatDialogRef: (?, ?, ?).
Error: Can't resolve all parameters for MatDialogRef: (?, ?, ?).
changing providers to:
providers: [
{ provide: MatDialogRef, useValue: {} },
{ provide: MAT_DIALOG_DATA, useValue: data }
]
results in the following error:
Error: No provider for Dialog!
How do I resolve this?
I solved it by changing the component constructor to:
constructor(
public dialogRef: MatDialogRef<CustomDialogComponent>,
@Inject(MAT_DIALOG_DATA) public data: Dialog | any
)
The providers in the TestBed were:
providers: [{ provide: MatDialogRef, useValue: {} }, { provide: MAT_DIALOG_DATA, useValue: data }]
If you use at least one MatDialogRef method, you should create a mock.
For example I use the close() method. Without it errors would be generated so I made the below class with an empty method.
export class MatDialogRefMock {
close(value = '') {
}
}
and use that instead of an empty value, with useClass
{ provide: MatDialogRef, useClass: MatDialogRefMock },
Import MatDialogModule and MatDialogRef from angular/material/dialog instead of angular/material. Import the ModalDialogModule and provide providers for MatDialogRef in your TestBed.
Import {MatdialogModule,MatDialogRef} from '@angular/material/dialog';
TestBed.configureTestingModule({
declarations: [componentName],
imports: [MatdialogModule],
providers: [{provide : MatDialogRef, useValue : {}}]
});