tijo1

//Main.java
public class Main {
    public static void main(String[] args) {
        assertAddMethod();
        MaxFinderTest.testMaxFinder();
    }

    static void assertAddMethod() {
        int result = add(1, 2);
        assert result == 3 : "Given 1 and 2, When add method is called, Then it should return 3";
        System.out.println("Add method test passed");
    }

    static int add(int first, int second) {
        return first + second;
    }
}


//MaxFinder.java
public class MaxFinder {
    public static Integer max(Integer[] digits) {
        if (digits == null || digits.length == 0) {
            return null;
        }

        Integer max = digits[0];
        for (int i = 1; i < digits.length; i++) {
            if (digits[i] != null && (max == null || digits[i] > max)) {
                max = digits[i];
            }
        }

        return max;
    }
}


//MaxFinderTest.java
public class MaxFinderTest {
    public static void testMaxFinder() {
        testNullInput();
        testEmptyArray();
        testSingleElementArray();
        testMultipleElementsArray();
        System.out.println("All tests passed successfully.");
    }

    private static void testNullInput() {
        Integer[] digits = null;
        assert MaxFinder.max(digits) == null : "Given null input, When max method is called, Then it should return null";
        System.out.println("Test for null input passed");
    }

    private static void testEmptyArray() {
        Integer[] digits = {};
        assert MaxFinder.max(digits) == null : "Given empty array, When max method is called, Then it should return null";
        System.out.println("Test for empty array passed");
    }

    private static void testSingleElementArray() {
        Integer[] digits = {5};
        assert MaxFinder.max(digits) == 5 : "Given single element array, When max method is called, Then it should return the element itself";
        System.out.println("Test for single element array passed");
    }

    private static void testMultipleElementsArray() {
        Integer[] digits = {5, 3, 9, 1, 7};
        assert MaxFinder.max(digits) == 9 : "Given multiple elements array, When max method is called, Then it should return the maximum element";
        System.out.println("Test for multiple elements array passed");
    }
}