“But this worked the other day!”
I don’t know about you, but reading that sentence just frustrates me! Don’t you hate when things worked one day and it doesn’t the next. It’s the stuff of (developer) nightmares.
What if there was a way to ward yourself against that evil? Well, you’re in luck because that’s the goal of software testing! It prevents this situation from happening over and over again. On top of that, it helps you improve the quality of the code you write. Awesome!
Now, software testing is a HUGE field. You have a ton of different types of testing. Each with its own purpose (and, sometimes, philosophy). Today, we’re going to focus on just one type of testing. It’s called unit testing.