How to implement Modal / ModalRef in Angular Unit Tests

*Expected behavior*Being able to do unit tests with components that use the MdbModal / MdbModalRef

*Actual behavior*Receiving an error:NullInjectorError: R3InjectorError(DynamicTestModule)[MdbModalRef -> MdbModalRef]: NullInjectorError: No provider for MdbModalRef!

I have tried importing different Modules, like MdbModalModule or setting MdbModalRef in providers, but nothing has worked.

What is the standard way to implement the MdbModal in Unit Tests?

Resources (screenshots, code snippets etc.)

Test File:

import { async, ComponentFixture, TestBed } from '@angular/core/testing';
import { TranslateModule } from '@ngx-translate/core';
import { MdbModalModule, MdbModalRef } from 'mdb-angular-ui-kit/modal';


import { AcceptChangesDialogComponent } from './accept-changes-dialog.component';

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

  beforeEach(async(() => {
TestBed.configureTestingModule({
  imports: [MdbModalModule, MdbModalRef, TranslateModule.forRoot()],
  declarations: [AcceptChangesDialogComponent],
}).compileComponents();
  }));

  beforeEach(() => {
fixture = TestBed.createComponent(AcceptChangesDialogComponent);
component = fixture.componentInstance;
fixture.detectChanges();
  });

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

Component:

import { Component } from '@angular/core';
    import { MdbModalRef } from 'mdb-angular-ui-kit/modal';

@Component({
  selector: 'accept-changes-dialog',
  templateUrl: './accept-changes-dialog.component.html'
})
export class AcceptChangesDialogComponent {
  public header: string | undefined;
  public icon = 'save';
  public content: string | undefined;
  public action = false;

      constructor(public modalRef: MdbModalRef<AcceptChangesDialogComponent>) {
      }

  public cancel(): void {
    this.action = false;
    this.modalRef.close(this.action);
  }

  public accept(): void {
    this.action = true;
    this.modalRef.close(this.action);
  }
}