Having trouble with the environment.ts file during Angular 2 testing

Having issues while attempting to write a basic test in Angular 2, specifically with an error related to environment.ts:

ERROR in ./web/environments/environment.ts Module build failed: Error: web\environments\environment.ts is missing from the TypeScript compilation. Please make sure it is in your tsconfig via the 'files' or 'include' property.

app.component.ts

import { Component} from '@angular/core';
import { environment } from '../environments/environment';

@Component({
  selector: 'web-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.scss']
})
export class AppComponent implements OnInit {
  title = 'Test App'; 

  constructor() {
    console.log(environment);
  }  
}

app.component.spec.ts

import { AppComponent } from './app.component';

describe('AppComponent', () => {
  it(`should 1+1`, () => {
    expect(1 + 1).toEqual(2);  //Success
  });
  it('should have component ', () => {
    const component = new AppComponent();  //Throws error
    // expect(component).toBeTruthy();
  });
});

Any ideas on how to resolve this issue?

Answer №1

Follow these steps to create your **.spec.ts file:

import { TestBed, async } from '@angular/core/testing';
import { AppComponent } from './app.component';
import { AppModule } from './app/app.module';
import { APP_BASE_HREF } from '@angular/common';

describe('App Testing', () => {
    beforeEach(() => {
        jasmine.DEFAULT_TIMEOUT_INTERVAL = 60000;
        TestBed.configureTestingModule({
            declarations: [
                AppComponent
            ],
            imports: [
                AppModule
            ],
            providers: [
                { provide: APP_BASE_HREF, useValue: '/' }
            ]
        });
    });

    it('should instantiate the component', async(() => {
        let fixture = TestBed.createComponent(AppComponent);
        let app = fixture.debugElement.componentInstance;
        expect(app).toBeTruthy();
    }));
});

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

The term 'protractor' is not identified as a valid internal or external command, executable program, or batch file

I have successfully set up Protractor to run from a batch file with the command "protractor conf.js" and the script is functioning correctly. Protractor has been installed globally and all necessary environment settings have been configured. However, when ...

Move the creation of the HTML string to an HTML template file within ngx bootstrap popover

I have incorporated ngx bootstrap in my project through this link To display dynamic HTML content in the popover body, I am using a combination of ngx-bootstrap directives and Angular template syntax as shown below: <span *ngFor="let item of items;"&g ...

Angular Checkbox Click EventLearn how to handle click events on

How can I toggle the visibility of a form using ngIf when a click event is triggered by a checkbox? Below is the code for my column header and column values: <th><label class="btn btn-filter"> <input type="checkbox" ...

The process of converting a video URI to a blob is encountering difficulties when using the Ionic framework on iOS devices

I have implemented the code below to convert a video file into a blob for iOS. Takevideo() { const options: CameraOptions = { sourceType: this.camera.PictureSourceType.PHOTOLIBRARY, destinationType: this.camera ...

The term "Movie" is not compatible as a JSX component

Currently working on a movie app project but encountering issues with handling arguments and displaying them properly using TypeScript. The challenge lies in trying to map the movie object, display them individually on the homepage, and showcase all the re ...

Tips for adding a class to the end of the DOM class

Greetings! I'm currently working with the code below: for ( let x: number = 0; x < this._vcr.element.nativeElement.querySelectorAll(".ui-steps-item").length; x++) { let className: any = this._vcr.element.nativeElement.querySelectorAll( ...

Expanding a class in Typescript by adding a function with the same name but varying properties and types

class A { play(a: string): string{ return a; } } class B extends A { play(c: string, b: number): string{ return c + ' ' + b.toString(); } } let x = new A(); console.log(x.play('John')); let y = new B(); console.lo ...

What is the correct way to link an array with ngModel using ngFor loop in Angular?

Utilizing ngModel within an ngFor iteration to extract values from a single input field like this : <mat-card class="hours" > <table id="customers"> <thead > <th >Project</th> ...

By constantly subscribing to a Behavior Subject, updating the data, and then resetting the value, an endless loop is created

We have implemented a wizard functionality with lazy loading, consisting of a parent component and multiple child components. const routes: Routes = [ { path : '', component : WizardHomeComponent, canActivate: [HomeGuard], chil ...

Has anyone tried using the JSON1 extension with Angular in an Ionic project?

Looking to extract SQlite information in JSON layout utilizing the JSON1 extension. Yet, upon trying to execute the code, an error message appears. Error {"message":"sqlite3_prepare_v2 failure: no such function: json_object", "co ...

Transforming functions into a new typed object with different function signatures

I am currently updating some React/Redux code that previously followed an older pattern to a more modern "hooks" based approach, using TypeScript. In the old pattern, we utilized "class-based" components and passed their "dispatch" functions using mapDisp ...

Can TypeScript identify and eliminate any undefined values within an array effectively?

Is there a simple and efficient method to achieve the following: const x: (string|undefined)[] = ['aaa', undefined, 'ccc']; const y = _.filter(x, it => !!it); in order for TypeScript to correctly identify y as string[], without nee ...

Developing a Universal Type in Typescript

Encountered an issue with generic types while working on a user-defined type(interface) structured like this: IList1: { prop1: string, prop2: number, prop3: string . . . } ILi ...

Having trouble with passing data using @Input in Angular 5

My goal is to pass a value from app.component.ts named user and assign it to the property of the userComponent called user. Below are the code snippets: app.component.ts import { Component } from '@angular/core'; @Component({ selector: &apo ...

A React component featuring a nested map function should always include a "unique key" prop for each element

I am trying to figure out how to assign a proper Key Value in this component: {var.map((building, index) => { const handles = building.buildingVertices.map((point) => { return ( <DrawingHandle key={`${i ...

What is the best way to update the state of a response from an API call for a detailed object using React context, so that there is no need to retrigger the API call

I'm currently developing a react native typescript project. How can I assign the data received from an API call to my context object? I want to avoid making the API call every time the component is loaded. Instead, I want to check if the context alr ...

Creating a TypeScript type that supports a flexible number of generic parameters

I am currently working on creating an emit function that has the capability to accept multiple arguments. In addition, TypeScript will validate the 2nd argument and beyond based on the 1st argument (the event). The code provided below is a starting point, ...

Solve the issue of the __typename union

Imagine having the following union: export type IBookmarkItemFragment = | ({ __typename: "Story" } & { story: number; }) | ({ __typename: "Product" } & { product: number; }) | ({ __typename: "Project" } & { proj ...

Creating fixtures with Playwright is a simple process that can greatly enhance

I have a requirement to set up fixtures where the first fixture is always available (acting as a base class) and the second fixture will vary in different test files (like a derived class). I've implemented the following code which seems to be working ...

TSLint is encountering the error code TS2459: The module "@azure/core-tracing" claims to have a local declaration of "Span" but does not export it, along with additional errors

I'm completely lost on how to tackle this error. The message I'm getting doesn't provide much insight, other than indicating an issue with the installation of '@azure/ai-text-analytics'. I've gone through the process of uninst ...