Angular: How to mock MatDialogRef while testing

Question

I have a DialogComponent that has the following constructor where Dialog is a custom object:

constructor(
    public dialogRef: MatDialogRef

        

Answer 1

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 },