DruidDataSource support clone

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

@@ -0,0 +1,76 @@
+package com.alibaba.druid.bvt.pool;
+
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+
+import junit.framework.Assert;
+import junit.framework.TestCase;
+
+import com.alibaba.druid.mock.MockConnection;
+import com.alibaba.druid.pool.DruidDataSource;
+import com.alibaba.druid.util.JdbcUtils;
+
+
+public class TestClone extends TestCase {
+    private DruidDataSource dataSource;
+    
+    protected void setUp() throws Exception {
+        dataSource = new DruidDataSource();
+
+        dataSource.setUsername("xxx1");
+        dataSource.setPassword("ppp");
+        dataSource.setUrl("jdbc:mock:xx");
+        dataSource.setFilters("stat");
+        dataSource.setMaxOpenPreparedStatements(30);
+    }
+    
+    public void test_clone() throws Exception {
+        Connection conn_0 = dataSource.getConnection();
+        Connection conn_1 = dataSource.getConnection();
+        Connection conn_2 = dataSource.getConnection();
+        
+        DruidDataSource clone = dataSource.clone();
+        clone.init();
+        
+        dataSource.close();
+        
+        Assert.assertEquals(dataSource.getUrl(), clone.getUrl());
+        Assert.assertEquals(dataSource.getUsername(), clone.getUsername());
+        Assert.assertEquals(dataSource.getPassword(), clone.getPassword());
+        Assert.assertEquals(dataSource.getFilterClassNames(), clone.getFilterClassNames());
+        Assert.assertEquals(dataSource.getMaxOpenPreparedStatements(), clone.getMaxOpenPreparedStatements());
+        
+        PreparedStatement ps_0 = conn_0.prepareStatement("select 1");
+        ResultSet rs = ps_0.executeQuery();
+        rs.next();
+        rs.close();
+        ps_0.close();
+        
+        // dataSource is closed, but connections is not closed
+        Assert.assertFalse(conn_0.isClosed());
+        Assert.assertFalse(conn_1.isClosed());
+        Assert.assertFalse(conn_2.isClosed());
+        
+        MockConnection mockConn_0 = conn_0.unwrap(MockConnection.class);
+        MockConnection mockConn_1 = conn_1.unwrap(MockConnection.class);
+        MockConnection mockConn_2 = conn_2.unwrap(MockConnection.class);
+        
+        Assert.assertFalse(mockConn_0.isClosed());
+        Assert.assertFalse(mockConn_1.isClosed());
+        Assert.assertFalse(mockConn_2.isClosed());
+        
+        conn_0.close(); // no error
+        conn_1.close(); // no error
+        conn_2.close(); // no error
+        
+        // real connection already closed
+        Assert.assertTrue(mockConn_0.isClosed());
+        Assert.assertTrue(mockConn_1.isClosed());
+        Assert.assertTrue(mockConn_2.isClosed());
+    }
+    
+    protected void tearDown() throws Exception {
+        JdbcUtils.close(dataSource);
+    }
+}