Chapter 5. Unit Testing with JUnit
JUnit is a regression testing framework written by Kent Beck and Erich Gamma. Since Erich is the project leader for Eclipse's Java toolkit, it's only natural that JUnit is well integrated into the IDE.
A Simple Factorial Demo
To try out unit testing in Eclipse, first create a project called Factorial containing a class called Factorial
. Inside that class, create a factorial
() method as follows:
public class
Factorial {public static double
factorial(int
x) {if
(x == 0)return
1.0;return
x + factorial(x - 1); } }
Tip
If you notice the nasty little error in this code, ignore it for now. That's part of the demonstration!
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