In this tutorial we will dive into JUnit5 framework even more basing on very simple Calculator project that will grow with us during tutorial.
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The tutorial repository can be found here: https://gitlab.eufus.eu/bpogodzinski/ach-tutorials/-/tree/TDD-java/TDD-java/Calculator |
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Our Calculator.java look like this:
As you can see it has only divide() method, that checks if b is equal to 0. If it is, it throws an exception.
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public class Calculator {
static Double divide(Double a, Double b) {
if (b != 0) {
return a / b;
}
else{
throw new ArithmeticException("Division by 0 is impossible!");
}
}
public static void main(String[] args) {
System.out.printf(Calculator.divide(8.0,2.0).toString());
}
} |
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So let's write first simple test:
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