Author Archives : Mario

Want to be a testing guru? Use reachability graphs (Part 6)

Continuing with our exploration of reachability graphs, the graph below shows another very interesting bug in Chrome’s PDF viewer. The beauty of reachability graphs is that it is remarkably easy to follow the abstract states to recreate bugs, and it is impossible to make mistakes in doing so. Go ahead and follow the abstract states […]

Step 2 of bug recreate for Chrome's PDF Viewer

The Trip Tester vs the Travel Tester

Tripsters I have consistently noticed that people that take trips expect everything to be the same as their home town. They don’t like unexpected events or surprises. They go on trips out of obligation, not to meet new people or new ways of life. Perhaps it’s the current sales pitch or training they will offer to some company, […]

Reachability graphs make irrelevant states clear

Want to be a testing guru? Use reachability graphs (Part 2) 1

A fairly long time ago, I introduced reachability graphs and showed you how to start using them to debug applications. After all, debugging is a form of testing. In this post, I’ll continue exploring reachability graphs for the purposes of exploratory testing. To illustrate their useful power, I will use reachability graphs to test some aspects of an […]

An example of how TestLess’ TestDetectors work

In this post, I’ll illustrate the workflow that you can use to extend TestLess so it can analyze any test suite. I will use a real example from a real customer to show you how easy it is to extend TestLess.     The Problem Recently, I received the following question from a customer:   I’d […]