content: package com.alibaba.druid.pvt.pool;
  
  import com.alibaba.druid.mock.MockPreparedStatement;
  import com.alibaba.druid.pool.DruidDataSource;
  import com.alibaba.druid.util.JdbcUtils;
  import junit.framework.TestCase;
  import org.junit.Assert;
  
  import java.sql.Connection;
  import java.sql.PreparedStatement;
  
  public class PSCacheTest5 extends TestCase {
      private DruidDataSource dataSource;
  
      protected void setUp() throws Exception {
          dataSource = new DruidDataSource();
          dataSource.setUrl("jdbc:mock:x1");
          dataSource.setPoolPreparedStatements(true);
          dataSource.setMaxOpenPreparedStatements(10);
      }
  
      protected void tearDown() throws Exception {
          JdbcUtils.close(dataSource);
      }
  
      public void test_0() throws Exception {
          MockPreparedStatement mockStmt = null;
          {
              Connection conn = dataSource.getConnection();
              PreparedStatement ps = conn.prepareStatement("select 1");
              mockStmt = ps.unwrap(MockPreparedStatement.class);
              ps.execute();
              conn.close();
          }
          for (int i = 0; i < 1000; ++i) {
              Connection conn = dataSource.getConnection();
              PreparedStatement ps = conn.prepareStatement("select 1");
  
              Assert.assertSame(mockStmt, ps.unwrap(MockPreparedStatement.class));
  
              ps.execute();
              ps.close();
              conn.close();
          }
      }
  }
  