Add tests for HowManyTimesRotated (#3669)

src/test/java/com/thealgorithms/searches/HowManyTimesRotatedTest.java

@@ -0,0 +1,17 @@
+package com.thealgorithms.searches;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+import org.junit.jupiter.api.Test;
+
+public class HowManyTimesRotatedTest {
+
+    @Test
+    public void testHowManyTimesRotated() {
+        int[] arr1 = {5, 1,2,3,4};
+        assertEquals(1, HowManyTimesRotated.rotated(arr1));
+        int[] arr2 = {15,17,2,3,5};
+        assertEquals(2, HowManyTimesRotated.rotated(arr2));
+    }
+}
+