Commons Net example source code file (POP3ConstructorTest.java)

This example Commons Net source code file (POP3ConstructorTest.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Commons Net tags/keywords

exception, io, pop3, pop3, pop3client, pop3client, pop3constructortest, pop3constructortest, pop3messageinfo, reader, string, string, testcase

The Commons Net POP3ConstructorTest.java source code

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.commons.net.pop3;

import junit.framework.TestCase;
import java.io.Reader;

/**
 * @author <a href="mailto:commons-dev@apache.org">[Net]
 * @version $Id: POP3ConstructorTest.java 922741 2010-03-14 02:54:50Z sebb $
 *
 * The POP3* tests all presume the existence of the following parameters:
 *   mailserver: localhost (running on the default port 110)
 *   account: username=test; password=password
 *   account: username=alwaysempty; password=password.
 *   mail: At least four emails in the test account and zero emails
 *         in the alwaysempty account
 *
 * If this won't work for you, you can change these parameters in the
 * TestSetupParameters class.
 *
 * The tests were originally run on a default installation of James.
 * Your mileage may vary based on the POP3 server you run the tests against.
 * Some servers are more standards-compliant than others.
 */
public class POP3ConstructorTest extends TestCase
{
    String user = TestSetupParameters.user;
    String emptyUser = TestSetupParameters.emptyuser;
    String password = TestSetupParameters.password;
    String mailhost = TestSetupParameters.mailhost;

    /**
     *
     */
    public POP3ConstructorTest(String name)
    {
        super(name);
    }

    /**
     * This test will ensure that the constants are not inadvertently changed.
     * If the constants are changed in org.apache.commons.net.pop3 for some
     * reason, this test will have to be updated.
     */
    public void testConstants()
    {
        //From POP3
        assertEquals(110, POP3.DEFAULT_PORT);
        assertEquals(-1, POP3.DISCONNECTED_STATE);
        assertEquals(0, POP3.AUTHORIZATION_STATE);
        assertEquals(1, POP3.TRANSACTION_STATE);
        assertEquals(2, POP3.UPDATE_STATE);

        //From POP3Command
        assertEquals(0, POP3Command.USER);
        assertEquals(1, POP3Command.PASS);
        assertEquals(2, POP3Command.QUIT);
        assertEquals(3, POP3Command.STAT);
        assertEquals(4, POP3Command.LIST);
        assertEquals(5, POP3Command.RETR);
        assertEquals(6, POP3Command.DELE);
        assertEquals(7, POP3Command.NOOP);
        assertEquals(8, POP3Command.RSET);
        assertEquals(9, POP3Command.APOP);
        assertEquals(10, POP3Command.TOP);
        assertEquals(11, POP3Command.UIDL);
    }

    /**
     * Test the default constructor
     *
     */
    public void testPOP3DefaultConstructor()
    {
        POP3 pop = new POP3();

        assertEquals(110, pop.getDefaultPort());
        assertEquals(POP3.DISCONNECTED_STATE, pop.getState());
        assertNull(pop._reader);
        assertNotNull(pop._replyLines);
    }

    /**
     * Test the default constructor
     *
     */
    public void testPOP3ClientStateTransition() throws Exception
    {
        POP3Client pop = new POP3Client();

        //Initial state
        assertEquals(110, pop.getDefaultPort());
        assertEquals(POP3.DISCONNECTED_STATE, pop.getState());
        assertNull(pop._reader);
        assertNotNull(pop._replyLines);

        //Now connect
        pop.connect(mailhost);
        assertEquals(POP3.AUTHORIZATION_STATE, pop.getState());

        //Now authenticate
        pop.login(user, password);
        assertEquals(POP3.TRANSACTION_STATE, pop.getState());

        //Now do a series of commands and make sure the state stays as it should
        pop.noop();
        assertEquals(POP3.TRANSACTION_STATE, pop.getState());
        pop.status();
        assertEquals(POP3.TRANSACTION_STATE, pop.getState());

        //Make sure we have at least one message to test
        POP3MessageInfo[] msg = pop.listMessages();

        if (msg.length > 0)
        {
            pop.deleteMessage(1);
            assertEquals(POP3.TRANSACTION_STATE, pop.getState());

            pop.reset();
            assertEquals(POP3.TRANSACTION_STATE, pop.getState());

            pop.listMessage(1);
            assertEquals(POP3.TRANSACTION_STATE, pop.getState());

            pop.listMessages();
            assertEquals(POP3.TRANSACTION_STATE, pop.getState());

            pop.listUniqueIdentifier(1);
            assertEquals(POP3.TRANSACTION_STATE, pop.getState());

            pop.listUniqueIdentifiers();
            assertEquals(POP3.TRANSACTION_STATE, pop.getState());

            Reader r = pop.retrieveMessage(1);
            assertEquals(POP3.TRANSACTION_STATE, pop.getState());

            //Add some sleep here to handle network latency
            while(!r.ready())
            {
                Thread.sleep(10);
            }
            r.close();
            r = null;

            r = pop.retrieveMessageTop(1, 10);
            assertEquals(POP3.TRANSACTION_STATE, pop.getState());

            //Add some sleep here to handle network latency
            while(!r.ready())
            {
                Thread.sleep(10);
            }
            r.close();
            r = null;

        }

        //Now logout
        pop.logout();
        assertEquals(POP3.UPDATE_STATE, pop.getState());
    }
}