修正isWrapFor && unwrap

git-svn-id: http://code.alibabatech.com/svn/druid/trunk@478 b9813039-fb51-4c41-a8b9-e21c2acb5095

src/test/java/com/alibaba/druid/bvt/pool/Case3.java

@@ -3,11 +3,11 @@ package com.alibaba.druid.bvt.pool;
 import java.sql.Connection;
 import java.sql.PreparedStatement;
 import java.sql.ResultSet;
-import java.sql.Statement;
 
 import junit.framework.Assert;
 import junit.framework.TestCase;
 
+import com.alibaba.druid.mock.MockStatement;
 import com.alibaba.druid.pool.DruidDataSource;
 
 public class Case3 extends TestCase {
@@ -50,14 +50,20 @@ public class Case3 extends TestCase {
         ResultSet rs = stmt.executeQuery();
         rs.next();
 
+        MockStatement mockStmt = stmt.unwrap(MockStatement.class);
+        Assert.assertEquals(false, mockStmt.isClosed());
+
         conn.close();
+        
+        Assert.assertEquals(true, mockStmt.isClosed());
 
         Assert.assertEquals(true, stmt.isClosed());
         Assert.assertEquals(true, rs.isClosed());
 
         rs.close();
         stmt.close();
-        
+
+        stmt.execute("SELECT 1");
 
         dataSource.close();
     }