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How to implement CQRS with Spring : new framework

This article is a presentation of a new little framework, I have developed and used on several projects.

The framework is for Spring Framework and requires Java 8.0. The code is on GitHub and downloadable from Bintray or JCenter.

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Writing an integration test with a mail server

This is a simple example of code to demonstrate how to use the library fakesmtp-junit-runner to write integration tests with mail servers.

The library has been released on GitHub and Maven Central. Continue Reading

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TOP open-source dashboard solutions 2017

A Dashboard can be a very efficient communication tool for a team, between managers and business units. It enables an organization around a vision to share common goals. It can also be useful to identify weaknesses in processes and adapt your strategy according to them.

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Test and Data Generation for Java Unit tests

Today I was preparing a presentation about Software Code quality for a TechTalk on Thursday. I made a search on Internet about Automatic Unit test generator and Data Generators. I will present some tools I have tried. Today, we will speak of Randoop.

Randoom Test Generator

Randoom Test Generator

The first tool name is Randoop.. This tool is existing since 2007 and its purpose is to generate automatically unit tests 🙂 Directly from your class definition!

To use it you have two choices:

  • You can use your software JAR or classpath directory.
  • You can include it in your test compile path (on gradle or maven) and creates a main or unit test.

To explain short the theory, thanks to the Java reflection it’s quite easy to produce automatic tests validating some contracts of your API.

Some examples: – toString() should never returns null or throws an Exception – equals() and compareTo() methods have a long list of constraints – Reflexivity: o.equals(o) == true – Symmetry: o1.equals(o2) == o2.equals(o1) – Transitivity: o1.equals(o2) && o2.equals(o3) ⇒ o1.equals(o3) – Equals to null: o.equals(null) == false – It does not throw an exception

Therefore this tool is generating unit tests with JUnit(TestSuite) for the list of classes you provide.

I have done some tests and you can reach 50-60% of coverage quite easily.

The main drawbacks of the solution are: – The unit tests are drawing a snapshot (precise picture) of your code and its behaviour however some tests are really non-sense and you don’t want to edit them. – They don’t replace handwritten tests since the tool is not understand the different between a String parameter emailand fullName. He will mostly use dumb strings.

About the technology, it’s not production ready: – I had troubles with the jar and its dependency plume. – The JAR is a fatjar and coming with dependencies that broke my software.

In conclusion, I will fork the software and try to fix the problems to make it more popular 🙂

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SonarQube and ReactJS

This article is showing you how to use SonarQube with ReactJS and its JSX files. I will use both SonarQube JavaScript plugin and the additional plugin Sonar EsLint plugin.

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SonarQube plugins for AngularJS and Javascript you may not know

In this article, I will present you two new SonarQube plugins that you will never find on SonarQube marketplace (for some good reasons).

Keep reading if you are developing in TypeScript, AngularJS 2, Javascript.

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