ConnectionTest.java

package org.postgresql.test.jdbc2;

import org.postgresql.test.JDBC2Tests;
import junit.framework.TestCase;
import java.sql.*;

/**
 * TestCase to test the internal functionality of org.postgresql.jdbc2.Connection
 * and it's superclass.
 *
 * PS: Do you know how difficult it is to type on a train? ;-)
 *
 * $Id: ConnectionTest.java,v 1.5 2001/09/23 04:11:14 momjian Exp $
 */

public class ConnectionTest extends TestCase {

  /**
   * Constructor
   */
  public ConnectionTest(String name) {
    super(name);
  }

  // Set up the fixture for this testcase: the tables for this test.
  protected void setUp() throws Exception {
  	Connection con = JDBC2Tests.openDB();

	JDBC2Tests.createTable(con, "test_a", "imagename name,image oid,id int4");
	JDBC2Tests.createTable(con, "test_c", "source text,cost money,imageid int4");

	JDBC2Tests.closeDB(con);
  }

  // Tear down the fixture for this test case.
  protected void tearDown() throws Exception {
  	Connection con = JDBC2Tests.openDB();

	JDBC2Tests.dropTable(con, "test_a");
	JDBC2Tests.dropTable(con, "test_c");
	
    JDBC2Tests.closeDB(con);
  }

  /**
   * Tests the two forms of createStatement()
   */
  public void testCreateStatement() {
    try {
      java.sql.Connection conn = JDBC2Tests.openDB();

      // A standard Statement
      java.sql.Statement stat = conn.createStatement();
      assertNotNull(stat);
      stat.close();

      // Ask for Updateable ResultSets
      stat = conn.createStatement(java.sql.ResultSet.TYPE_SCROLL_INSENSITIVE,java.sql.ResultSet.CONCUR_UPDATABLE);
      assertNotNull(stat);
      stat.close();

    } catch(SQLException ex) {
      assertTrue(ex.getMessage(),false);
    }
  }

  /**
   * Tests the two forms of prepareStatement()
   */
  public void testPrepareStatement() {
    try {
      java.sql.Connection conn = JDBC2Tests.openDB();

      String sql = "select source,cost,imageid from test_c";

      // A standard Statement
      java.sql.PreparedStatement stat = conn.prepareStatement(sql);
      assertNotNull(stat);
      stat.close();

      // Ask for Updateable ResultSets
      stat = conn.prepareStatement(sql,java.sql.ResultSet.TYPE_SCROLL_INSENSITIVE,java.sql.ResultSet.CONCUR_UPDATABLE);
      assertNotNull(stat);
      stat.close();

    } catch(SQLException ex) {
      assertTrue(ex.getMessage(),false);
    }
  }

  /**
   * Put the test for createPrepareCall here
   */
  public void testPrepareCall() {
  }

  /**
   * Test nativeSQL
   */
  public void testNativeSQL() {
    // For now do nothing as it returns itself
  }

  /**
   * Test autoCommit (both get & set)
   */
  public void testTransactions() {
    try {
      java.sql.Connection con = JDBC2Tests.openDB();
      java.sql.Statement st;
      java.sql.ResultSet rs;

      // Turn it off
      con.setAutoCommit(false);
      assertTrue(!con.getAutoCommit());

      // Turn it back on
      con.setAutoCommit(true);
      assertTrue(con.getAutoCommit());

      // Now test commit
      st = con.createStatement();
      st.executeUpdate("insert into test_a (imagename,image,id) values ('comttest',1234,5678)");

      con.setAutoCommit(false);

      // Now update image to 9876 and commit
      st.executeUpdate("update test_a set image=9876 where id=5678");
      con.commit();
      rs = st.executeQuery("select image from test_a where id=5678");
      assertTrue(rs.next());
      assertEquals(9876, rs.getInt(1));
      rs.close();

      // Now try to change it but rollback
      st.executeUpdate("update test_a set image=1111 where id=5678");
      con.rollback();
      rs = st.executeQuery("select image from test_a where id=5678");
      assertTrue(rs.next());
      assertEquals(9876, rs.getInt(1)); // Should not change!
      rs.close();

      JDBC2Tests.closeDB(con);
    } catch(SQLException ex) {
      assertTrue(ex.getMessage(),false);
    }
  }

  /**
   * Simple test to see if isClosed works.
   */
  public void testIsClosed() {
    try {
      Connection con = JDBC2Tests.openDB();

      // Should not say closed
      assertTrue(!con.isClosed());

      JDBC2Tests.closeDB(con);

      // Should now say closed
      assertTrue(con.isClosed());

    } catch(SQLException ex) {
      assertTrue(ex.getMessage(),false);
    }
  }

  /**
   * Test the warnings system
   */
  public void testWarnings() {
    try {
      Connection con = JDBC2Tests.openDB();

      String testStr = "This Is OuR TeSt message";

      // The connection must be ours!
      assertTrue(con instanceof org.postgresql.Connection);

      // Clear any existing warnings
      con.clearWarnings();

      // Set the test warning
      ((org.postgresql.Connection)con).addWarning(testStr);

      // Retrieve it
      SQLWarning warning = con.getWarnings();
      assertNotNull(warning);
      assertEquals(testStr, warning.getMessage());

      // Finally test clearWarnings() this time there must be something to delete
      con.clearWarnings();
      assertTrue(con.getWarnings()==null);

      JDBC2Tests.closeDB(con);
    } catch(SQLException ex) {
      assertTrue(ex.getMessage(),false);
    }
  }

	/**
	 * Transaction Isolation Levels
	 */
	public void testTransactionIsolation()
	{
		try
		{
			Connection con = JDBC2Tests.openDB();

			// PostgreSQL defaults to READ COMMITTED
			assertEquals(Connection.TRANSACTION_READ_COMMITTED,
				     con.getTransactionIsolation());

			// Begin a transaction
			con.setAutoCommit(false);

			// The isolation level should not have changed
			assertEquals(Connection.TRANSACTION_READ_COMMITTED,
				     con.getTransactionIsolation());

			// Now change the default for future transactions
			con.setTransactionIsolation(Connection.TRANSACTION_SERIALIZABLE);

			// Since the call to setTransactionIsolation() above was made
			// inside the transaction, the isolation level of the current
			// transaction did not change. It affects only future transactions.
			// This behaviour is recommended by the JDBC spec.
			assertEquals(Connection.TRANSACTION_READ_COMMITTED,
				     con.getTransactionIsolation());

			// Begin a new transaction
			con.commit();

			// Now we should see the new isolation level
			assertEquals(Connection.TRANSACTION_SERIALIZABLE,
				     con.getTransactionIsolation());

			// Repeat the steps above with the transition back to
			// READ COMMITTED.
			con.setTransactionIsolation(Connection.TRANSACTION_READ_COMMITTED);
			assertEquals(Connection.TRANSACTION_SERIALIZABLE,
						 con.getTransactionIsolation());
			con.commit();
			assertEquals(Connection.TRANSACTION_READ_COMMITTED,
						 con.getTransactionIsolation());

			// Now run some tests with autocommit enabled.
			con.setAutoCommit(true);

			assertEquals(Connection.TRANSACTION_READ_COMMITTED,
						 con.getTransactionIsolation());

			con.setTransactionIsolation(Connection.TRANSACTION_SERIALIZABLE);
			assertEquals(Connection.TRANSACTION_SERIALIZABLE,
						 con.getTransactionIsolation());

			con.setTransactionIsolation(Connection.TRANSACTION_READ_COMMITTED);
			assertEquals(Connection.TRANSACTION_READ_COMMITTED, con.getTransactionIsolation());

			// Test if a change of isolation level before beginning the
			// transaction affects the isolation level inside the transaction.
			con.setTransactionIsolation(Connection.TRANSACTION_SERIALIZABLE);
			assertEquals(Connection.TRANSACTION_SERIALIZABLE,
						 con.getTransactionIsolation());
			con.setAutoCommit(false);
			assertEquals(Connection.TRANSACTION_SERIALIZABLE,
						 con.getTransactionIsolation());
			con.setAutoCommit(true);
			assertEquals(Connection.TRANSACTION_SERIALIZABLE,
						 con.getTransactionIsolation());
			con.setTransactionIsolation(Connection.TRANSACTION_READ_COMMITTED);
			assertEquals(Connection.TRANSACTION_READ_COMMITTED,
						 con.getTransactionIsolation());
			con.setAutoCommit(false);
			assertEquals(Connection.TRANSACTION_READ_COMMITTED,
						 con.getTransactionIsolation());

			JDBC2Tests.closeDB(con);
		} 
		catch ( SQLException ex ) 
		{
			fail( ex.getMessage() );
		}
	}

  /**
   * JDBC2 Type mappings
   */
  public void testTypeMaps() {
    try {
      Connection con = JDBC2Tests.openDB();

      // preserve the current map
      java.util.Map oldmap = con.getTypeMap();

      // now change it for an empty one
      java.util.Map newmap = new java.util.HashMap();
      con.setTypeMap(newmap);
      assertEquals(newmap, con.getTypeMap());

      // restore the old one
      con.setTypeMap(oldmap);
      assertEquals(oldmap, con.getTypeMap());

      JDBC2Tests.closeDB(con);
    } catch(SQLException ex) {
      assertTrue(ex.getMessage(),false);
    }
  }
}