[英]NullInjectorError: R3InjectorError(DynamicTestModule)[FormBuilder -> FormBuilder]: NullInjectorError: No provider for FormBuilder
[英]NullInjectorError: R3InjectorError(DynamicTestModule)[Router -> Function -> Function]: NullInjectorError: No provider for Function
最近我開始學習 angular 並且在我的第一個項目(ToDo API)中,當我測試應用程序時遇到了一個問題: ng test
。 如您所見,錯誤在標題中。
這是我的組件,我得到錯誤:
import { ComponentFixture, TestBed } from '@angular/core/testing';
import { Router } from '@angular/router';
import { TodosComponent } from './todos.component';
describe('TodosComponent', () => {
let component: TodosComponent;
let fixture: ComponentFixture<TodosComponent>;
beforeEach(async () => {
await TestBed.configureTestingModule({
providers: [ Router ],
declarations: [ TodosComponent ]
})
.compileComponents();
});
beforeEach(() => {
fixture = TestBed.createComponent(TodosComponent);
component = fixture.componentInstance;
fixture.detectChanges();
});
it('should create', () => {
expect(component).toBeTruthy();
});
});
這是我的 app.module.ts:
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { FormsModule, ReactiveFormsModule } from '@angular/forms';
import { HttpClientModule, HTTP_INTERCEPTORS } from '@angular/common/http';
import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';
import { UserComponent } from './user/user.component';
import { RegistrationComponent } from './user/registration/registration.component';
import { LoginComponent } from './user/login/login.component';
import { TodosComponent } from './user/todos/todos.component';
import { CreateItemComponent } from './user/todos/create-item/create-item.component';
import { UserService } from './shared/user.service';
import { AuthInterceptor } from './auth/auth.interceptor';
import { ShowCompleteDeleteComponent } from './user/todos/show-complete-delete/show-complete-delete.component';
@NgModule({
declarations: [
AppComponent,
UserComponent,
RegistrationComponent,
LoginComponent,
TodosComponent,
CreateItemComponent,
ShowCompleteDeleteComponent
],
imports: [
BrowserModule,
AppRoutingModule,
ReactiveFormsModule,
FormsModule,
HttpClientModule
],
providers: [UserService, {
provide: HTTP_INTERCEPTORS,
useClass: AuthInterceptor,
multi: true
}],
bootstrap: [AppComponent]
})
export class AppModule { }
我將衷心感謝您的幫助!
使用 RouterTestingModule,它必須在導入中。
await TestBed.configureTestingModule({
declarations: [ TodosComponent ]
imports: [ RouterTestingModule ],
})
.compileComponents();
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