March 2015
Intermediate to advanced
236 pages
5h 26m
English
Content preview from Pragmatic Unit Testing in Java 8 with JUnit
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
Right-B[I]CEP: Checking Inverse Relationships
Sometimes you’ll be able to check behavior by applying its logical inverse. For mathematic computations, this is often the case: you can verify division with multiplication, addition with subtraction, and so on.
We decided to implement our own square-root function using Newton’s algorithm (a silly idea, given that Math.sqrt() is a trustworthy native implementation; apparently, we suffer from not-invented-here syndrome). We recall that if we derive the square root of a number and square that result (that is, multiply it by itself), we should get the same number we started with:
| iloveyouboss/15/test/scratch/NewtonTest.java | |
| | import org.junit.*; |
| | import static org.junit.Assert.*; |
| | import static ... |
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