package algorithms.utils; import static org.junit.jupiter.api.Assertions.*; public class ArrayUtilsTest { int[] sample = {1, 3, 5, 7, 9}; @Test void testFindMax() { assertEquals(9, ArrayUtils.findMax(sample)); } @Test void testFindMin() { assertEquals(1, ArrayUtils.findMin(sample)); } @Test void testSum() { assertEquals(25, ArrayUtils.sum(sample)); } @Test void testAverage() { assertEquals(5.0, ArrayUtils.average(sample)); } @Test void testReverse() { int[] arr = {1, 2, 3, 4}; ArrayUtils.reverse(arr); assertArrayEquals(new int[]{4, 3, 2, 1}, arr); } @Test void testContains() { assertTrue(ArrayUtils.contains(sample, 5)); assertFalse(ArrayUtils.contains(sample, 10)); } @Test void testEmptyArray() { int[] empty = {}; assertThrows(IllegalArgumentException.class, () -> ArrayUtils.findMax(empty)); assertThrows(IllegalArgumentException.class, () -> ArrayUtils.findMin(empty)); assertThrows(IllegalArgumentException.class, () -> ArrayUtils.average(empty)); } @Test void testNullArray() { int[] arr = null; assertEquals(0, ArrayUtils.sum(arr)); assertFalse(ArrayUtils.contains(arr, 1)); } }