diff --git a/test/com/leetcode/arrays/RotateArrayTest.java b/test/com/leetcode/arrays/RotateArrayTest.java
new file mode 100644
index 00000000..ba686fdb
--- /dev/null
+++ b/test/com/leetcode/arrays/RotateArrayTest.java
@@ -0,0 +1,34 @@
+package com.leetcode.arrays;
+import org.junit.Test;
+import static org.junit.Assert.assertArrayEquals;
+
+public class RotateArrayTest {
+
+    @Test
+    public void testRotateArray_whenRotateThreeStep() {
+        // Given
+        RotateArray rotateArray = new RotateArray();
+        int[] arr = {1, 2, 3, 4, 5, 6, 7};
+        int[] exepctedArr = {5, 6, 7, 1, 2, 3, 4};
+
+        // When
+        rotateArray.rotate(arr, 3);
+
+        // Then
+        assertArrayEquals(arr, exepctedArr);
+    }
+
+    @Test
+    public void testRotateArray_whenRotateFourStepAndArrayHasOnlyOneElement() {
+        // Given
+        RotateArray rotateArray = new RotateArray();
+        int[] arr = {1};
+        int[] exepctedArr = {1};
+
+        // When
+        rotateArray.rotate(arr, 4);
+
+        // Then
+        assertArrayEquals(arr, exepctedArr);
+    }
+}