Error: Expected no open requests, found 1

I am getting this error when I try to execute HTTP unit test cases.

I am using Angular 5. How can I resolve this?

Below is my code for normal GET. Below code just brings normal GET.

import { TestBed } from '@angular/core/testing';
import { HttpClientTestingModule, HttpTestingController, TestRequest } from
'@angular/common/http/testing';

import { DangerService } from './danger.service';
import { DangerFlag } from '../danger.model';


describe('DataService Tests', () => {
let dataService: DangerService;
let httpTestingController: HttpTestingController;

let testDangerFlags: DangerFlag[] = [ "sample data" ]

beforeEach(() => {
TestBed.configureTestingModule({
imports: [ HttpClientTestingModule ],
providers: [ DangerService ]
});

dataService = TestBed.get(DangerService);
httpTestingController = TestBed.get(HttpTestingController);
});

afterEach(() => {
httpTestingController.verify();
});

fit('should get all danger flags', () => {
dataService.getDangerFlagDetails()
.subscribe((data: DangerFlag[]) => {
expect(data.length).toBe(3);
});
});
});

Continue reading...