Load Testing Blog¶

Apr 4, 2016
in Development
3 min read

Angular2: using TypeScript generics

This post is an example of TypeScript generics usage, when writing an Angular2 application.

I'm working on a Stripe administration console. Stripe is a payment / subscription SaaS service that we use at OctoPerf.

I need to create pages that lists all our customers and plans. But Stripe returns paginated lists, and we need to do successive calls to their API to get the complete data. This mechanism is the same for both customers and plans lists. So we can factorise our code using generics in this particular case.

The generic model

The first step is to create a common interface for customers and plans. They share a String id.

export interface HasId {
  id:string;
}

Apr 3, 2016
in Development
2 min read

Angular2: method callback type in TypeScript

It's my third post about Angular2 and TypeScript as I'm creating an admin console for OctoPerf load testing platform.

Intro

This article explains how to set a type for callbacks. If, like me, you are used to AngularJS you may often use callbacks for asynchronous calls, typically for HTTP requests.

I wrote a StripeClient service that can return the list of my Customers. In pure JavaScript it would be fairly simple as you don't need to give a type to your callback.

In Angular2 / TypeScript

In TypeScript it's a bit more complicated, but cleaner.

Mar 31, 2016
in Development
2 min read

Unit testing in Angular2

Unit tests in Angular2 with Karma

To follow up on my first article about Angular2 I want to unit test our Login component:

import {Component} from 'angular2/core';
import {AuthenticationService} from '../services/authentication';
import {Router} from 'angular2/router';

@Component({
  selector: 'login',
  providers: [ ],
  directives: [ ],
  pipes: [ ],
  styles: [ require('./login.css') ],
  template: require('./login.html')
})
export class Login {
  private credentials: string = '';

  constructor(private authService: AuthenticationService, private router: Router) {
  }

  onSignIn(){
    this.authService.setCredentials(this.credentials);
    this.router.navigate(['Home']);
  }
}

Mar 29, 2016
in Development
3 min read

Mar 24, 2016
in Development
3 min read

Immutable Spring Service with Lombok

Project Lombok is an amazing Java library which makes it possible to write very concise code. It's an incredibly powerful library which uses an annotation processor to generate code behind the scene.

Why use lombok

Let me show you a very simple example:

@Value
public class Person {
 String firstname;
 String lastname;
}