Technical News

Sep 20 2018

Mutation testing is a serious game

Automate what?

Thanks to this tweet from Arie Van Deursen, Head of Software Technical Department at TU DELFT and STAMP project partner, we are glad to share with you this online resource where you can learn about mutation testing through a serious game.
Pick your side carefully between attackers who are mutating the software code, and defenders who are adding new tests. And let us know about your gamification experience...

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Sep 19 2018

Repairnator to repair software bugs on a large scale


Repairnator is an innovative bot to repair software bugs on a large scale, and an open source solution available to all developers now with a STAMP connection!

This development comes from the Spirals team, a joint team between Inria and the University of Lille within UMR 9189, CNRS-Centrale Lille-University of Lille, CRIStAL. More…

Sep 18 2018

Facebook SapFix and Sapienz to find and fix software bugs

Facebook engineers are investigating code automation using Artificial Intelligence in Sapienz and mutation-based fix in SapFix.
Both tools are designed to speed up the deployment of new software through distributed codes that are pre-tested and as stable as possible.
According to a recent article, they are intended for open source release in the future, once additional engineering work is completed, but no date is mentioned. More…

Sep 17 2018

Google Test Efficacy: running software at scale

Peter Spragins, Google Software Engineer and Teaching Assistant at UCSD Math Department, is summarizing almost four years of experience in running software tests at scale, with several colleagues in Mountain View (California).
"The two key numbers for the system's performance are sensitivity, the percentage of failing tests we actually execute, and specificity, the percentage of passing tests we actually skip. The two numbers go hand in hand."
Discover how Machine Learning is now part of the Google process of committing code. Read his article about Efficacy Presubmit Service

Sep 05 2018

STAMP and DeFlacker approach compared

Automate what?

Flaky tests raise a major testing problem in the software industry, in term of performance overhead.

Automatically detecting flaky tests, DeFlaker provides a new milestone in order to cope with them in a principled way.
There is no need to re-run the failed tests anymore. 

In the STAMP project, we follow a similar philosophy: we target major testing problems (missing assertions, crash reproduction) and we invent principled tools that target those problems and that are evaluated on large and complex software projects. These projects are both coming from the STAMP project partners and from international open source members from the OW2 community. More…

Sep 03 2018

Descartes Tutorial at ASE 2018

Place: Montpellier Corum Conference Center
Conference: ASE 2018
Instructors: Benoît Baudry (KTH), Vincent Massol (XWiki), Oscar Luis Vera Pérez (INRIA)

Let the CI spot the holes in tested code with Descartes tool

Bring your laptop, your favorite Java project (with JUnit tests) and find out how much of the covered code is actually specified by the test suite!

In this tutorial, we introduce the intriguing concept of pseudo-tested method, i.e. methods that are covered by the test suite, yet no test case fails when the method body is removed. We show that such methods can be found in mature, well-tested projects and we discuss some possible root causes. Attendants have the opportunity to experiment hands-on with our tool, called Descartes tool, which automatically detects pseudo-tested methods in Java projects. More…

Jul 20 2018

Resolving Maven Artifacts with ShrinkWrap... or Not

Trying to generate custom XWiki WARs directly from the unit tests, Vincent Massol, XWiki CTO, gave a try to the the SkrinkWrap Resolver.
Follow his work on this article about Resolving Maven Artifacts with ShrinkWrap... or Not 

Jun 25 2018

Environment Testing Experimentations

As part of the STAMP Project, Vincent Massol, XWiki CTO, is conducting five testing experimentations, with issues and limitations.
Read more insights in his article about Environment Testing Experimentations  

May 09 2018

Automatic Test Generation DSpot

DSpot is a mutation testing tool that automatically generates new tests from existing test suites. It's being developed as part of the STAMP European research project to which XWiki SAS is participating to.
Read this article from Vincent Massol, CTO of Wiki about DSpot Automatic Test Generation

Nov 17 2017

Controlling Test Quality

How to verify the quality of your tests?
Vincent Massol, XWiki CTO, suggests a strategy for Test Quality Control

Nov 08 2017

Flaky tests handling with Jenkins and JIRA

Flaky tests are a plague because they lower the credibility in your CI strategy, by sending false positive notification emails.

Vincent Massol, XWiki Technical Director suggests a new Flaky test strategy.

Oct 29 2017

Creating your own project's Quality Dashboard

Conference: SoftShake 2017, Geneva

Offered at SoftShake 2017 in Geneva, by Vincent Massol, Technical Director of XWiki SAS, this brand new presentation explains how to use XWiki to create a custom Quality Dashboard by aggregating metrics from other sites (Jenkins, SonarQube, JIRA and GitHub), saving them locally to draw history graphs and sending emails when combined metric thresholds are crossed. More…

Sep 28 2017

Mutation testing with PIT and Descartes

Vincent Massol, Technical Director of XWiki SAS, wrote an article about a recent experimentation with Descartes, a mutation engine for PIT, in the framework of the STAMP project. 

Here's an example of running Descartes on an XWiki module:

For more information, click on the Pit test report and read the Vincent Massol blog post, published here: Mutation testing with PIT and Descartes

Sep 17 2017

Using Docker and Jenkins to test configurations

XWiki SAS is part of the STAMP research project and one domain of this research is improving configuration testing.

In this article, Vincent Massol, Technical Director of XWiki SAS, suggests a new architecture that should allow XWiki to be tested on various configurations, including various supported databases and versions, various Servlet containers and versions, and Various Browsers and versions.

Aug 30 2017

Mutate and Test Your Tests

by Benoit Baudry

I am extremely proud and happy that my talk on mutation testing got accepted as an early bird for EclipseCon Europe 2017.

We will talk a lot about software testing at the project quality day. In this talk, I will focus on qualitative evaluation of a unit test suite. Statement coverage is commonly used to quantify the quality of a test suite: it measures the ratio of source code statements that are executed at least once when running the test suite. However, statement coverage is known to be a rather weak quality indicator. For example, a test suite that covers 100% of the statements and that has absolutely no assertion is a very bad test suite, yet is considered of excellent quality according statement coverage.


Jun 06 2017

Jenkins Pipelines: Attach Failing Test Screenshot

How to attach failing test screenshot to a Jenkins Pipeline?
Read Vincent Massol, XWiki CTO article about Jenkins Pipelines

May 10 2017

TPC Strategy Check

Read Vincent Massol, XWiki CTO, article about TPC Strategy Check

Dec 10 2016

Full Automated Test Coverage with Jenkins and Clover

Generating full coverage report for a multi-reactor project is a complex task.
Hopefully, Vincent Massol, XWiki CTO, provides a script with clear explanations for that need.
Ready to jump ?
Read his article on test coverage reports generation with Jenkins and Clover