When working with Angular and the Angular CLI, one might import an RxJS Observable as: import { Observable } from 'rxjs'; Later, running TSLint reports This import is blacklisted, import a submo...

TypeScript includes a concise way to create and assign a class instance property from a constructor parameter. Rather than: class TestClass { private name: string; constructor(name: string) ...

Angular includes its own functionality for making HTTP requests. When using it, you may want to react to any errors that happen – perhaps to display an on-screen error message. You can achieve tha...

TestBed’s configureTestingModule method looks similar to NgModule in usage. Check out this side by side example: @NgModule({ | TestBed.configureTestingModule({ ...

I posted a personal recap last year, and the year before that. For this year, I’m calling it “2016: Personal Highlights”: I received my first Microsoft MVP award in Visual Studio and Developmen...

Angular includes a Title service, which includes getTitle(): string and setTitle(newTitle: string). If you want to keep an in-page header matching the browser title tag, you’ll need something to en...

Here’s a simple template for testing Angular 2 services. If the HttpModule portions are uncommented and used, it will make actual wire calls. To use mock calls instead, see Angular 2 MockBackend S...

Below is a template for using TestBed and MockBackend for mocking Angular 2 HTTP calls. If you want to make actual wire calls, see Angular 2 Services Testing Template instead. import { async, inj...

Below is a template for using TestBed to test Angular 2 components. import { async, TestBed } from '@angular/core/testing'; import { SomeComponent } from './some.component'; beforeEach(() => ...

Tests are great. I like testing, tests, and talking about testing and tests. I think code coverage is useful. It can identify gaps in testing, providing a “hey, maybe you should test over here” no...