我尝试为我的Angular 4/5
组件创建单元测试,其中我有很多导入。但是在导入LocationStrategy之后我得到了一个:
TypeError:this._platformStrategy.getBaseHref不是函数
从LocationStrategy
导入@angular/common
时显示的内容。
我的spec.ts
文件:
student.component.spec.ts
import {TestBed, ComponentFixture, async} from '@angular/core/testing';
import {Observable} from 'rxjs/Observable';
import 'rxjs/add/observable/of';
import {StudentComponent} from './student.component';
import {StudentService} from './student.service';
import {Student} from './student';
import {RecordsCount} from '../shared/entities/recordsCount';
import {Group} from '../groups/group';
import {GroupsService} from '../groups/groups.service';
import {NO_ERRORS_SCHEMA} from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { HttpHandler } from '@angular/common/http';
import { OverlayModule } from '@angular/cdk/overlay';
import { MainMaterialModule } from '../main-material.module';
import { HttpClientTestingModule } from '@angular/common/http/testing';
import { UpdateDeleteEntityService } from '../entity-table/update-delete-entity.service';
import { InfoModalService } from '../info-modal/info-modal.service';
import { ActivatedRoute } from '@angular/router';
import { Location, LocationStrategy } from '@angular/common';
describe('StudentComponent', () => {
let fixture: ComponentFixture<StudentComponent>;
let component: StudentComponent;
let mockRouter = {
navigate: jasmine.createSpy('navigate')
};
beforeEach(async(() => {
TestBed.configureTestingModule({
declarations: [StudentComponent],
schemas: [NO_ERRORS_SCHEMA],
imports: [MainMaterialModule, HttpClientTestingModule],
providers: [
StudentService,
GroupsService,
InfoModalService,
UpdateDeleteEntityService,
Location,
LocationStrategy,
{ provide: ActivatedRoute, useValue: mockRouter}]
}).compileComponents();
}));
beforeEach(() => {
fixture = TestBed.createComponent(StudentComponent);
component = fixture.debugElement.componentInstance;
fixture.detectChanges();
});
it('should return array of students', () => {
const studentService = fixture.debugElement.injector.get(StudentService);
fixture.detectChanges();
const students: Student[] = [
{
userId: 20,
gradebookId: 'UX-3311221',
studentSurname: 'Лящовський',
studentName: 'Андрій',
studentFname: 'Іванович',
groupId: '2',
plainPassword: '',
photo: ''
}, {
userId: 13,
gradebookId: 'UY-3019273',
studentSurname: 'Заник',
studentName: 'Іван',
studentFname: 'Григорович',
groupId: '5',
plainPassword: '',
photo: ''
}, {
userId: 155,
gradebookId: 'UT-1029384',
studentSurname: 'Лінкольн',
studentName: 'Абрагім',
studentFname: 'Зимонсович',
groupId: '1',
plainPassword: '',
photo: ''
}];
const recordsCount: RecordsCount = {
numberOfRecords: '3'
};
const spy = spyOn(studentService, 'getStudentsRange').and.returnValue(Observable.of([students, recordsCount]));
component.getStudents();
expect(component.students).toEqual(students);
});
});
答案 0 :(得分:14)
您可能已经找到了解决方案,但以防万一,并且为了其他有相同问题的人的利益。我遇到了这个问题,发现以下解决方案有效:
我认为问题是LocationStrategy是一个抽象类,你需要提供一个扩展LocationStrategy的具体类,比如PathLocationStrategy。我在服务提供商列表中添加了以下内容
{ provide: LocationStrategy, useClass: PathLocationStrategy },
然后因为PathLocationStrategy依赖于APP_BASE_REF我还添加了一个提供者
{ provide: APP_BASE_HREF, useValue: '/my/app'}
APP_BASE_HREF和PathLocationStrategy是从@ angular / common导入的,与Location和LocationStrategy相同