refactor: cleanup StoogeSort (#5283)

* refactor: cleanup StoogeSort

* refactor: update DIRECTORY.md for StoogeSortTest

---------

Co-authored-by: Alex Klymenko <alx@alx.com>

DIRECTORY.md

@@ -891,6 +891,7 @@
             * [SortingAlgorithmTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/sorts/SortingAlgorithmTest.java)
             * [SortUtilsRandomGeneratorTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/sorts/SortUtilsRandomGeneratorTest.java)
             * [SortUtilsTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/sorts/SortUtilsTest.java)
+            * [StoogeSortTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/sorts/StoogeSortTest.java)
             * [StrandSortTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/sorts/StrandSortTest.java)
             * [SwapSortTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/sorts/SwapSortTest.java)
             * [TimSortTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/sorts/TimSortTest.java)

src/main/java/com/thealgorithms/sorts/StoogeSort.java

@@ -7,9 +7,12 @@ package com.thealgorithms.sorts;
 public class StoogeSort implements SortAlgorithm {
 
     @Override
-    public <T extends Comparable<T>> T[] sort(T[] unsortedArray) {
-        sort(unsortedArray, 0, unsortedArray.length);
-        return unsortedArray;
+    public <T extends Comparable<T>> T[] sort(T[] array) {
+        if (array.length == 0) {
+            return array;
+        }
+        sort(array, 0, array.length);
+        return array;
     }
 
     public <T extends Comparable<T>> T[] sort(T[] unsortedArray, int start, int end) {
@@ -28,24 +31,4 @@ public class StoogeSort implements SortAlgorithm {
         }
         return unsortedArray;
     }
-
-    public static void main(String[] args) {
-        StoogeSort stoogeSort = new StoogeSort();
-
-        Integer[] integerArray = {8, 84, 53, 953, 64, 2, 202};
-        // Print integerArray unsorted
-        SortUtils.print(integerArray);
-
-        stoogeSort.sort(integerArray);
-        // Print integerArray sorted
-        SortUtils.print(integerArray);
-
-        String[] stringArray = {"g", "d", "a", "b", "f", "c", "e"};
-        // Print stringArray unsorted
-        SortUtils.print(stringArray);
-
-        stoogeSort.sort(stringArray);
-        // Print stringArray sorted
-        SortUtils.print(stringArray);
-    }
 }

src/test/java/com/thealgorithms/sorts/StoogeSortTest.java

@@ -0,0 +1,12 @@
+package com.thealgorithms.sorts;
+
+public class StoogeSortTest extends SortingAlgorithmTest {
+    protected int getGeneratedArraySize() {
+        return 1000;
+    }
+
+    @Override
+    SortAlgorithm getSortAlgorithm() {
+        return new StoogeSort();
+    }
+}