fix: add more testsx

src/callback/implicit-flow-callback.service.ts

@@ -1,4 +1,3 @@
-import { Router } from '@angular/router';
 import { Injectable, inject } from 'injection-js';
 import { type Observable, throwError } from 'rxjs';
 import { catchError, tap } from 'rxjs/operators';
@@ -6,13 +5,15 @@ import type { OpenIdConfiguration } from '../config/openid-configuration';
 import type { CallbackContext } from '../flows/callback-context';
 import { FlowsDataService } from '../flows/flows-data.service';
 import { FlowsService } from '../flows/flows.service';
+import { injectAbstractType } from '../injection';
+import { AbstractRouter } from '../router';
 import { IntervalService } from './interval.service';
 
 @Injectable()
 export class ImplicitFlowCallbackService {
   private readonly flowsService = inject(FlowsService);
 
-  private readonly router = inject(Router);
+  private readonly router = injectAbstractType(AbstractRouter);
 
   private readonly flowsDataService = inject(FlowsDataService);