IntRangeTest

import org.junit.Test;
import static org.junit.Assert.*;

public class IntRangeTest {

    public static boolean decideWithIfOneTwoOrThree(int number) {
        return (number >= 1 && number <= 3);
    }

    @Test
    public void test() {
        assertFalse(decideWithIfOneTwoOrThree(Integer.MIN_VALUE));
        assertFalse(decideWithIfOneTwoOrThree(-100));
        assertFalse(decideWithIfOneTwoOrThree(-10));
        assertFalse(decideWithIfOneTwoOrThree(-1));
        assertFalse(decideWithIfOneTwoOrThree(0));

        assertTrue(decideWithIfOneTwoOrThree(1));
        assertTrue(decideWithIfOneTwoOrThree(2));
        assertTrue(decideWithIfOneTwoOrThree(3));

        assertFalse(decideWithIfOneTwoOrThree(4));
        assertFalse(decideWithIfOneTwoOrThree(5));
        assertFalse(decideWithIfOneTwoOrThree(10));
        assertFalse(decideWithIfOneTwoOrThree(100));
        assertFalse(decideWithIfOneTwoOrThree(Integer.MAX_VALUE));
    }

}