/*
 * 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.net.InetAddress;
import java.io.IOException;


/**
 * @author <a href="mailto:commons-dev@apache.org">[Net]</a>
 * @version $Id$
 *
 * 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 POP3ClientTest extends TestCase
{
    POP3Client p = null;

    String user = TestSetupParameters.user;
    String emptyUser = TestSetupParameters.emptyuser;
    String password = TestSetupParameters.password;
    String mailhost = TestSetupParameters.mailhost;

    /**
     *
     */
    public POP3ClientTest(String name)
    {
        super(name);
    }

    private void reset() throws IOException
    {
        //Case where this is the first time reset is called
        if (p == null)
        {
            //Do nothing
        }
        else if (p.isConnected())
        {
            p.disconnect();
        }
        p = null;
        p = new POP3Client();
    }

    private void connect() throws Exception
    {
        p.connect(InetAddress.getByName(mailhost));
        assertTrue(p.isConnected());
        assertEquals(POP3.AUTHORIZATION_STATE, p.getState());
    }

    private void login() throws Exception
    {
        assertTrue(p.login(user, password));
        assertEquals(POP3.TRANSACTION_STATE, p.getState());
    }

    /**
     * Simple test to logon to a valid server using a valid
     * user name and password.
     */
    public void testValidLoginWithNameAndPassword() throws Exception
    {
        reset();
        connect();

        //Try with a valid user
        login();
    }

    /**
     *
     */
    public void testInvalidLoginWithBadName() throws Exception
    {
        reset();
        connect();

        //Try with an invalid user that doesn't exist
        assertFalse(p.login("badusername", password));
    }

    /**
     *
     */
    public void testInvalidLoginWithBadPassword() throws Exception
    {
        reset();
        connect();

        //Try with a bad password
        assertFalse(p.login(user, "badpassword"));
    }

    /**
     * Test to try to run the login method from the
     * disconnected, transaction and update states
     */
    public void testLoginFromWrongState() throws Exception
    {
        reset();

        //Not currently connected, not in authorization state
        //Try to login with good name/password
        assertFalse(p.login(user, password));

        //Now connect and set the state to 'transaction' and try again
        connect();
        p.setState(POP3.TRANSACTION_STATE);
        assertFalse(p.login(user, password));
        p.disconnect();

        //Now connect and set the state to 'update' and try again
        connect();
        p.setState(POP3.UPDATE_STATE);
        assertFalse(p.login(user, password));
        p.disconnect();
    }

    /**
     *
     *
     */
    public void testLogoutFromAllStates() throws Exception
    {
        //From 'transaction' state
        reset();
        connect();
        login();
        assertTrue(p.logout());
        assertEquals(POP3.UPDATE_STATE, p.getState());

        //From 'update' state
        reset();
        connect();
        login();
        p.setState(POP3.UPDATE_STATE);
        assertTrue(p.logout());
    }
}