diff --git a/src/test/java/com/alibaba/druid/bvt/mock/MockResultSetMetaDataTest.java b/src/test/java/com/alibaba/druid/bvt/mock/MockResultSetMetaDataTest.java
index 5892be51e0..a89524b657 100644
--- a/src/test/java/com/alibaba/druid/bvt/mock/MockResultSetMetaDataTest.java
+++ b/src/test/java/com/alibaba/druid/bvt/mock/MockResultSetMetaDataTest.java
@@ -1,12 +1,14 @@
 package com.alibaba.druid.bvt.mock;
 
 import java.math.BigDecimal;
+import java.sql.Date;
 
 import junit.framework.TestCase;
 
 import org.junit.Assert;
 
 import com.alibaba.druid.mock.MockResultSetMetaData;
+import com.alibaba.druid.mock.MockResultSetMetaData.ColumnMetaData;
 
 public class MockResultSetMetaDataTest extends TestCase {
 
@@ -15,5 +17,32 @@ public class MockResultSetMetaDataTest extends TestCase {
         Assert.assertTrue(meta.isWrapperFor(MockResultSetMetaData.class));
         Assert.assertFalse(meta.isWrapperFor(BigDecimal.class));
         Assert.assertTrue(meta.unwrap(MockResultSetMetaData.class) instanceof MockResultSetMetaData);
+        Assert.assertTrue(meta.unwrap(null) == null);
+        Assert.assertTrue(meta.unwrap(java.sql.ResultSetMetaData.class) != null);
+        Assert.assertTrue(meta.unwrap(Object.class) != null);
+        Assert.assertTrue(meta.unwrap(Date.class) == null);
+        
+        ColumnMetaData column = new ColumnMetaData();
+        meta.getColumns().add(column);
+        
+        meta.isAutoIncrement(1);
+        meta.isCaseSensitive(1);
+        meta.isSearchable(1);
+        meta.isCurrency(1);
+        meta.isNullable(1);
+        meta.isSigned(1);
+        meta.getColumnDisplaySize(1);
+        meta.getColumnLabel(1);
+        meta.getSchemaName(1);
+        meta.getPrecision(1);
+        meta.getScale(1);
+        meta.getTableName(1);
+        meta.getCatalogName(1);
+        meta.getColumnTypeName(1);
+        meta.isReadOnly(1);
+        meta.isWritable(1);
+        meta.isDefinitelyWritable(1);
+        meta.getColumnClassName(1);
+
     }
 }