I'm currently following this tuturial: https://www.youtube.com/watch?v=WlAq06Z_25Y&list=PL8p2I9GklV45JZerGMvw5JVxPSxCg8VPv&index=4
what i want
but html only shows
what i get:
i'm trying to learn angular but it's verry confusing if you try to follow a turturial but some things just dont match up
code:
app.module.ts code:
import { Component } from '#angular/core';
#Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent {
title = 'blog';
}
app.component.html code:
<h1>Hello World !</h1>
<h2>{{title}}</h2>
app.component.spec.ts code:
import { TestBed } from '#angular/core/testing';
import { RouterTestingModule } from '#angular/router/testing';
import { AppComponent } from './app.component';
describe('AppComponent', () => {
beforeEach(async () => {
await TestBed.configureTestingModule({
imports: [
RouterTestingModule
],
declarations: [
AppComponent
],
}).compileComponents();
});
it('should create the app', () => {
const fixture = TestBed.createComponent(AppComponent);
const app = fixture.componentInstance;
expect(app).toBeTruthy();
});
it(`should have as title 'blog'`, () => {
const fixture = TestBed.createComponent(AppComponent);
const app = fixture.componentInstance;
expect(app.title).toEqual('blog');
});
it('should render title', () => {
const fixture = TestBed.createComponent(AppComponent);
fixture.detectChanges();
const compiled = fixture.nativeElement;
expect(compiled.querySelector('.content span').textContent).toContain('blog app is running!');
});
});
You need to run your app with ng serve and then verify your output on localhost:4200.
In case you need to run it on any other port, use ng serve --port:portnumber
Try creating a public method to pass it between your components:
export class AppComponent {
public title = "blog";
}
<h2>{{ title }}</h2>
i used port 5200 but i should use port 4200 instead. now it works
Related
I have the following spec test:
import { HttpClientTestingModule } from '#angular/common/http/testing';
import { Component } from '#angular/core';
import { ComponentFixture, TestBed } from '#angular/core/testing';
import { of } from 'rxjs';
import { BASE_API_URL } from 'src/app/tokens/baseApiUrl.token';
import { RbacPermissionsService } from '../services/rbac-permissions.service';
import { SharedModule } from '../shared.module';
#Component({
selector: 'app-mock-test',
template: `<div *appHasPermission="{ items: 'view' }"></div>`,
providers: []
})
export class MockTestComponent {
constructor() {}
}
describe('HasPermissionDirective', () => {
let mockTestComponent: MockTestComponent;
let mockTestFixture: ComponentFixture<MockTestComponent>;
let rbacPermissionsService: RbacPermissionsService;
beforeEach(() => {
TestBed.configureTestingModule({
declarations: [MockTestComponent],
imports: [SharedModule, HttpClientTestingModule],
providers: [{provide: BASE_API_URL, useValue: '/some_api/'}]
});
rbacPermissionsService = TestBed.get(RbacPermissionsService);
mockTestFixture = TestBed.createComponent(MockTestComponent);
mockTestComponent = mockTestFixture.componentInstance;
});
it('should have no divs when permission is false', done => {
spyOn(rbacPermissionsService, 'getPermission').and.returnValue(of(false));
mockTestFixture.whenStable().then(() => {
mockTestFixture.detectChanges();
const divs = mockTestFixture.nativeElement.getElementsByTagName('div');
expect(divs.length).toBeFalsy();
done();
});
});
it('should have a visible view element when permission is true', done => {
spyOn(rbacPermissionsService, 'getPermission').and.returnValue(of(true));
mockTestFixture.whenStable().then(() => {
mockTestFixture.detectChanges();
const divs = mockTestFixture.nativeElement.getElementsByTagName('div');
expect(divs.length).toBeTruthy();
done();
});
});
});
When I run this in conjunction with all other tests, it fails with the error:
NullInjectorError: StaticInjectorError(DynamicTestModule)[InjectionToken ]:
StaticInjectorError(Platform: core)[InjectionToken ]:
NullInjectorError: No provider for InjectionToken !
But when I run it with fdescribe the tests pass.
I wholeheartedly admit that spec tests are not my strong suit. My gut says their might be a timing issue since the tests work in isolation but not when run as part of the larger group of tests.
I've spend the last few days trying to get up to speed with ng test and all the spec files #angular/cli creates when creating components and, well, pretty much else.
As I was working on my own portfolio website, I have come across an issue that I cannot seem to understand or fix.
I have this component (pretty vanilla stuff):
import { Component, OnInit } from '#angular/core';
import { ActivatedRoute } from '#angular/router';
import { Title } from '#angular/platform-browser'
import { ProjectDetails } from './project-details'
#Component({
selector: 'app-projects-details',
templateUrl: './projects-details.component.html',
styleUrls: ['./projects-details.component.sass']
})
export class ProjectsDetailsComponent implements OnInit {
// Class variables
currentContent: ProjectDetails
constructor(
private route : ActivatedRoute,
private title: Title
) { }
ngOnInit() {
// Assign the data to local variable for use
this.route.data.subscribe(content => {
this.currentContent = content.project.view //<-- This line causes the issue
// Set the title for the Projects view
this.title.setTitle(this.currentContent.view_title)
})
}
}
And this spec file (more vanilla stuff):
import { async, ComponentFixture, TestBed } from '#angular/core/testing';
import { RouterTestingModule } from '#angular/router/testing'
import { ProjectsDetailsComponent } from './projects-details.component';
import { ProjectDetails } from './project-details'
describe('ProjectsDetailsComponent', () => {
let component: ProjectsDetailsComponent;
let fixture: ComponentFixture<ProjectsDetailsComponent>;
const projectDetails : ProjectDetails = { /* valid object content */ }
beforeEach(async(() => {
TestBed.configureTestingModule({
imports:[
RouterTestingModule
],
declarations: [ ProjectsDetailsComponent ]
})
.compileComponents();
}));
beforeEach(() => {
fixture = TestBed.createComponent(ProjectsDetailsComponent);
component = fixture.componentInstance;
component.currentContent = projectDetails
fixture.detectChanges();
});
it('should create', () => {
expect(component).toBeTruthy();
});
});
When running the tests, I get this error:
TypeError: content.project is undefined in http://localhost:9876/_karma_webpack_/main.js (line 1576)
So, I'm not sure exactly what's going on here. No matter what I do, the error prevails.I have a similarly setup component that doesn't have this issue and a side by side comparison shows no differences in the spec.ts file aside from imports.
I tried changing the file to this:
import { async, ComponentFixture, TestBed } from '#angular/core/testing';
import { RouterTestingModule } from '#angular/router/testing'
import { ProjectsDetailsComponent } from './projects-details.component';
import { ProjectDetails } from './project-details'
import { ActivatedRoute } from '#angular/router';
describe('ProjectsDetailsComponent', () => {
let component: ProjectsDetailsComponent;
let fixture: ComponentFixture<ProjectsDetailsComponent>;
const projectDetails : ProjectDetails = {/* valid content */}
beforeEach(async(() => {
TestBed.configureTestingModule({
// imports:[
// RouterTestingModule
// ],
providers: [
{ provide: ActivatedRoute, useValue: projectDetails }
],
declarations: [ ProjectsDetailsComponent ]
})
.compileComponents();
}));
beforeEach(() => {
fixture = TestBed.createComponent(ProjectsDetailsComponent);
component = fixture.componentInstance;
component.currentContent = projectDetails
fixture.detectChanges();
});
it('should create', () => {
expect(component).toBeTruthy();
});
});
Which changes the error to this (which confuses me more):
TypeError: this.route.data is undefined in http://localhost:9876/_karma_webpack_/main.js (line 1575)
The question to the community: how do I fix this? What's the reason this error is coming up?
Instead of providing the raw projectDetails, provide an Observable in its data property:
import {of} from 'rxjs';
...
beforeEach(async(() => {
TestBed.configureTestingModule({
providers: [
// Properly provide the activated route mock object.
{ provide: ActivatedRoute, useValue: { data: of(projectDetails) } }
],
declarations: [ ProjectsDetailsComponent ]
})
.compileComponents();
}));
...
If you look at how you access the route data, you can see that it uses an Observable:
this.route.data.subscribe(content => {...});
One of the components that I'm testing is importing a constants file which is located outside the /src folder. When I run the test, there is an error inside the component.ts file saying that the constants object is undefined. Below are the details. Any help will be very helpful. Thanks in advance.
This is an error I'm getting when I run ng test.
Error :
TypeError: Cannot read property 'ROUTE_SERVICE_USER' of undefined
at WelcomeComponent../src/app/welcome/welcome.component.ts.WelcomeComponent.ngOnInit (http://localhost:9876/src/app/welcome/welcome.component.ts?:24:30)
Folder Structure :
AppConstants.js :
const AppConstants = {
HEADER_LANG: 'Content-Language',
HEADER_LANG_LOWER: 'content-language',
ROUT_WELCOME: '/welcome',
ROUT_NEWUSER: '/newuser',
ROUTE_SERVICE_USER: '/service/user/registered',
};
module.exports = AppConstants;
Welcome.component.ts :
import { Component, OnInit } from '#angular/core';
import AppConstants from '../../../common/AppConstants.js';
#Component({
selector: 'app-welcome',
templateUrl: './welcome.component.html',
styleUrls: ['./welcome.component.css']
})
export class WelcomeComponent implements OnInit {
constructor() {
}
ngOnInit() {
console.log(AppConstants.ROUTE_SERVICE_USER);
}
}
Welcome.component.spec.ts :
import { async, ComponentFixture, TestBed } from '#angular/core/testing';
import { WelcomeComponent } from './welcome.component';
describe('WelcomeComponent', () => {
let component: WelcomeComponent;
let fixture: ComponentFixture<WelcomeComponent>;
beforeEach(async(() => {
TestBed.configureTestingModule({
declarations: [ WelcomeComponent ]
})
.compileComponents();
}));
beforeEach(() => {
fixture = TestBed.createComponent(WelcomeComponent);
component = fixture.componentInstance;
fixture.detectChanges();
});
it('should create', () => {
expect(component).toBeTruthy();
});
});
I'm trying to write a simple unit test, but cannot get my template to compile. The AppComponent has one variable called text which renders to an h1 tag. When testing the html, this always comes back as ''. Does anyone know what I'm missing here?
Test code
import {TestBed, async, ComponentFixture} from '#angular/core/testing';
import {AppComponent} from './app.component';
describe('AppComponent', () => {
let fixture: ComponentFixture<AppComponent>;
let component: AppComponent;
const mainTitle = 'Angular Unit Testing';
beforeEach(async(() => {
TestBed.configureTestingModule({
declarations: [
AppComponent
],
})
.compileComponents()
.then(() => {
fixture = TestBed.createComponent(AppComponent);
component = fixture.componentInstance;
});
}));
it(`should render ${mainTitle} to an H1 tag`, async(() => {
const compiled = fixture.debugElement.nativeElement;
console.log('here', compiled.querySelector('h1'));
expect(compiled.querySelector('h1').textContent).toEqual(mainTitle);
}));
});
Component code
import { Component } from '#angular/core';
#Component({
selector: 'app-root',
templateUrl: './app.component.html'
})
export class AppComponent {
text = 'Angular Unit Testing';
}
HTML
<h1>{{text}}</h1>
You must set "text" public property of component-only then it will be rendered inside h1 tag
it(`should render ${mainTitle} to an H1 tag`, async(() => {
const compiled = fixture.debugElement.nativeElement;
component.text = 'Angular Unit Testing';
fixture.detectChanges();
expect(compiled.querySelector('h1').textContent).toEqual(mainTitle);
}));
I'm trying to test pieces of jquery code that are set on ngOnInit() of my angular app.These code adds and removes certain classes based on conditions that are identified using jquery functions.
Below is my component:
import { Component, OnInit, AfterContentInit } from '#angular/core';
declare var $: any;
#Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.scss']
})
export class AppComponent implements OnInit {
constructor() { }
ngOnInit() {
if ($('#js-drawer') !== undefined && $('#js-drawer').hasClass('pxh-drawer--narrow#lg')) {
$('#gf-header').removeClass('pxh-view-header--animate-narrow pxh-view-header--narrow#lg');
} else if ($('#js-drawer') !== undefined && $('#js-drawer').hasClass('pxh-drawer--wide#lg')) {
$('#gf-header').addClass('pxh-view-header--animate-narrow pxh-view-header--narrow#lg');
}
}
}
and below is the test case that I tried.
import { async, ComponentFixture, TestBed } from '#angular/core/testing';
declare var $;
fdescribe('AppComponent Test', () => {
let component: any;
let fixture: ComponentFixture<AppComponent>;
beforeEach(async(() => {
jasmine.DEFAULT_TIMEOUT_INTERVAL = 100000;
TestBed.configureTestingModule({
declarations: [AppComponent],
})
.compileComponents();
}));
beforeEach(() => {
fixture = TestBed.createComponent(AppComponent);
component = fixture.componentInstance;
fixture.detectChanges();
});
it('should be created', () => {
expect(component).toBeTruthy();
});
it('test onInit function', () => {
const case1 = $('#js-drawer');
const case2 = $('#js-drawer').hasClass('pxh-drawer--narrow#lg');
spyOn($('#gf-header'), 'removeClass');
component.ngOnInit();
if (case1 && case2) {
expect($('#gf-header')).toHaveBeenCalledWith('removeClass');
}
});
});
Do let me know if this is the right way to test..Thanks