我有一个名为'myPipe'的自定义管道。我得到:
找不到管道"myPipe"错误
在我的单元测试 TS 中。请求建议在我的 .spec.ts 中导入和声明的内容
这是我的 .spec.ts
import { async, ComponentFixture, TestBed } from '@angular/core/testing';
import { By } from '@angular/platform-browser';
import { DebugElement } from '@angular/core';
import { MyComponent } from './main-page-carousel.component';
describe('CarouselComponent', () => {
let component: MyComponent ;
let fixture: ComponentFixture<MyComponent>;
beforeEach(async(() => {
TestBed.configureTestingModule({
declarations: [ MyComponent ],
})
.compileComponents();
}));
beforeEach(() => {
fixture = TestBed.createComponent(MyComponent);
component = fixture.componentInstance;
fixture.detectChanges();
});
it('should create', () => {
expect(component).toBeTruthy();
});
});
谢谢!
你应该能够做到这一点:
import { MyPipe } from 'here put your custom pipe path';
TestBed.configureTestingModule({
declarations: [ MyComponentUnderTesting, MyPipe ]
})
遇到了同样的问题,并通过在我的规范中添加以下"模拟管道"来修复它:
import {Pipe, PipeTransform} from '@angular/core';
@Pipe({name: 'myPipe'})
class MockPipe implements PipeTransform {
transform(value: number): number {
// blah blah
return value;
}
}
然后,您必须将 MockPipe 添加到 TestBed configureTestingModule 声明中:
TestBed.configureTestingModule({
declarations: [ MyComponentUnderTesting, MockPipe ]
})
我遇到了几乎相同的管道问题; 在模板解析错误的情况下,您需要采取两个步骤:
-
在开始时导入所需的管道,如下所示:
import {{ your_pipe_name }} from '../your/pipe/location'
; -
将其添加到您的声明中:
TestBed.configureTestingModule({ declarations: [ your_pipe ] });
祝您编码愉快!
看起来你别名/命名了你的管道,但没有人基于此回答。例如,如果管道名为myCustomPipe
,但这与管道的类名不同:
import { Pipe, PipeTransform } from '@angular/core';
@Pipe({
name: 'myCustomPipe',
pure: false
})
export class MyPipe implements PipeTransform {
// ....
}
然后在spec.ts
文件中,您可以按如下方式导入管道,否则将找不到它:
import { MyPipe as myCustomPipe } from 'path/to/pipe';
在您的beforeEach()
中,您需要将别名引用为declaration
和provider
:
beforeEach(() => {
TestBed.configureTestingModule({
imports: [ ... ],
declarations: [ myCustomPipe, etc],
providers: [ myCustomPipe, etc ]
}).compilecomponents();
// etc
});
你应该开始类似的东西
import { TestBed, async } from '@angular/core/testing';
import { MyPipe } from 'here put your custom pipe path';
describe('Pipe: MyPipe', () => {
it('create an instance', () => {
let pipe = new MyPipe();
expect(pipe).toBeTruthy();
});
});