Add files via upload

Unit Test

Author: phungducnhan

src/main/java/com/leetcode/math/ReverseIntegerTest.java

@@ -0,0 +1,26 @@
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import org.junit.jupiter.api.*;
+
+public class ReverseIntegerTest {
+    private ReverseInteger num;
+    
+    @BeforeEach                                         
+    public void setUp() throws Exception {
+        num = new ReverseInteger();
+    }
+
+    @Test
+    @DisplayName("Test1")
+    public void case1(){
+        assertEquals(123, num.reverse(321), "Not Pass");
+        assertEquals(0, num.reverse(0), "Not Pass");
+        assertEquals(-123, num.reverse(-321), "Not Pass");
+    }   
+    @Test
+    @DisplayName("Test2")
+    public void case2(){
+     
+        assertEquals(0, num.reverse(Integer.MAX_VALUE+1), "Not Pass");
+        assertEquals(0, num.reverse(Integer.MIN_VALUE-1), "Not Pass");
+    }  
+}