JAVA

The static method

public class IntegerUtil { public static boolean isPrime(int n) ... }

should return true, if the int parameter is a prime number, false else. A prime number is a positive integer number with two divisors: 1 and itself. Examples: 2, 3, 5, 7, 11, 13, 17, ...

Write three JUnit tests that test this method as exhaustive as you can imagine. What are cases that need special treatment?

Here's the pattern:

@Test boolean result = IntegerUtil.isPrime(12); assertEqual(...)