### Question:
LearnSort { private static int[] merge(int[] arr1, int[] arr2) { int i = 0, j = 0, k = 0; int[] result = new int[arr1.length + arr2.length]; while (i < arr1.length && j < arr2.length) { if (arr1[i] <= arr2[j]) { result[k++] = arr1[i++]; } else { result[k++] = arr2[j++]; } } while (i < arr1.length) { result[k++] = arr1[i++]; } while (j < arr2.length) { result[k++] = arr2[j++]; } return result; }  static int[] insertSort(int[] array); static int[] shellSort(int[] array); static int[] selectionSort(int[] array); static int[] heapSort(int[] array); static int[] bubbleSort(@NotNull int[] array); static int[] quickSort(@NotNull int[] array); static int[] mergingSort(int[] array); static int[] radixSort(@NotNull int[] arr); final static int[] originalArray; }### Answer:
@Test public void testMerge() throws Exception { }