Testing is all about verifying that something works as expected. What are the challenges then? There are many, one very obvious is to actually know how it should work. Another challenge is to isolate the system under test so that it is possible to know what is tested and determine if that specific part works as expected.
January 31, 2013
March 7, 2012
A colleague asked that question the other day. What is a good test? It is a really difficult question to answer. There are a number of properties that hold true for a good test. I will list some of them and discuss why I think they are important. Others may think that the order of importance is different or that other properties are more important then those that I list.
I will show some examples using Java and JUnit of what I think are bad tests and how they can be refactored to something better.
Tests are automated in my world. I always try to avoid manually testing. The main reason for this is that manual testing is slow and hard to repeat arbitrary many times. Therefore, test should be read as automated test in for the rest of this text.