JavaScript testing - first impressions of Wallabyjs and Visual Studio

I’ve been a big fan of NCrunch for a long time now, when it comes to .Net test runners I don’t think there are any that beat it. So when I heard about the JavaScript test runner Wallaby I was intrigued enough to give it a try, even if it did mean writing JavaScript tests.

This week I started to write some new AngularJS functionality at DrDoctor and thought that now was as good a time as any to start writing a few JavaScript tests.

This post isn’t about writing Jasmine tests for Angular, there are already plenty of tutorials out on the internet, but rather about highlighting some of the features of Wallabyjs.

In line code coverage

When you have failing tests the inline coverage changes for that block to red

Show covering tests

If a test is failing it will show up in here as well and give you some details

Wallabyjs will also display the reasons your tests are failing

Highlight uncovered lines of code in a file