Mockito Made Clear

Saying Hello to Mockito

Ever since the original publication of The C Programming Language^[2] by Kernighan and Richie (1978), every programming language and framework is required, by law, to include a Hello, World! example. We’ll look at the Mockito version in this section, explain what Mockito does and what it is for, and introduce part of a larger system that we’ll use for further discussions later in the book.

For Java, the classic Hello, World! program is this, of course:

HelloWorld.java

public class HelloWorld {
    public static void main(String[] args) {
        System.out.println("Hello, World!");
    }
}

The HelloWorld class contains a main method, but main returns void, and void methods are tough to test. Mockito is a testing library, ...