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Commons Email example source code file (BaseEmailTestCase.java)

This example Commons Email source code file (BaseEmailTestCase.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 Email tags/keywords

file, illegalstateexception, internetaddress, io, ioexception, ioexception, list, list, messagingexception, mimemessage, string, string, util, wiser, wisermessage, wisermessage

The Commons Email BaseEmailTestCase.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.mail;

import java.io.BufferedOutputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.util.Date;
import java.util.Enumeration;
import java.util.List;

import javax.activation.DataHandler;
import javax.mail.Header;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

import junit.framework.TestCase;

import org.apache.commons.mail.settings.EmailConfiguration;
import org.subethamail.wiser.Wiser;
import org.subethamail.wiser.WiserMessage;



/**
 * Base test case for Email test classes
 *
 * @since 1.0
 * @author <a href="mailto:corey.scott@gmail.com">Corey Scott
 * @author <a href="mailto:epugh@opensourceconnections.com">Eric Pugh
 * @version $Id: BaseEmailTestCase.java 785799 2009-06-17 21:04:08Z sgoeschl $
 */

public abstract class BaseEmailTestCase extends TestCase
{
    /** Padding at end of body added by wiser/send */
    public static final int BODY_END_PAD = 3;
    /** Padding at start of body added by wiser/send */
    public static final int BODY_START_PAD = 2;

    /** Line separator in email messages */
    private static final String LINE_SEPARATOR = "\r\n";

    /** default port */
    private static int mailServerPort = EmailConfiguration.MAIL_SERVER_PORT;

    /** The fake Wiser email server */
    protected Wiser fakeMailServer;

    /** Mail server used for testing */
    protected String strTestMailServer = EmailConfiguration.MAIL_SERVER;
    /** From address for the test email */
    protected String strTestMailFrom = EmailConfiguration.TEST_FROM;
    /** Destination address for the test email */
    protected String strTestMailTo = EmailConfiguration.TEST_TO;
    /** Mailserver username (set if needed) */
    protected String strTestUser = EmailConfiguration.TEST_USER;
    /** Mailserver strTestPasswd (set if needed) */
    protected String strTestPasswd = EmailConfiguration.TEST_PASSWD;
    /** URL to used to test URL attachmetns (Must be valid) */
    protected String strTestURL = EmailConfiguration.TEST_URL;

    /** Test characters acceptable to email */
    protected String[] testCharsValid =
    {
            " ",
            "a",
            "A",
            "\uc5ec",
            "0123456789",
            "012345678901234567890",
            "\n"
    };

    /** Array of test strings */
    protected String[] testCharsNotValid = {"", null};

    /** Where to save email output **/
    private File emailOutputDir;

    /** counter for creating a file name */
    private static int fileNameCounter;

    /**
     * @param name name
     */
    public BaseEmailTestCase(String name)
    {
        super(name);
        emailOutputDir = new File("target/test-emails");
        if (!emailOutputDir.exists())
        {
            emailOutputDir.mkdirs();
        }
    }

    /** */
    protected void tearDown()
    {
        //stop the fake email server (if started)
        if (this.fakeMailServer != null && !isMailServerStopped(fakeMailServer))
        {
            this.fakeMailServer.stop();
            assertTrue("Mail server didn't stop", isMailServerStopped(fakeMailServer));
        }

        this.fakeMailServer = null;
    }

    /**
     * Gets the mail server port.
     * @return the port the server is running on.
     */
    protected int getMailServerPort()
    {
        return mailServerPort;
    }

    /**
     * Safe a mail to a file using a more or less unique file name.
     *
     * @param email email
     * @throws IOException writing the email failed
     * @throws MessagingException writing the email failed
     */
    protected void saveEmailToFile(WiserMessage email) throws IOException, MessagingException
    {
        int currCounter = fileNameCounter++ % 10;
        String emailFileName = "email" + new Date().getTime() + "-" + currCounter + ".eml";
        File emailFile = new File(emailOutputDir, emailFileName);
        EmailUtils.writeMimeMessage(emailFile, email.getMimeMessage() );
    }

    /**
     * @param intMsgNo the message to retrieve
     * @return message as string
     */
    public String getMessageAsString(int intMsgNo)
    {
        List receivedMessages = fakeMailServer.getMessages();
        assertTrue("mail server didn't get enough messages", receivedMessages.size() >= intMsgNo);

        WiserMessage emailMessage = (WiserMessage) receivedMessages.get(intMsgNo);

        if (emailMessage != null)
        {
            try
            {
                return serializeEmailMessage(emailMessage);
            }
            catch (Exception e)
            {
                // ignore, since the test will fail on an empty string return
            }
        }
        fail("Message not found");
        return "";
    }

    /**
     * Initializes the stub mail server. Fails if the server cannot be proven
     * to have started. If the server is already started, this method returns
     * without changing the state of the server.
     */
    public void getMailServer()
    {
        if (this.fakeMailServer == null || isMailServerStopped(fakeMailServer))
        {
            mailServerPort++;

            this.fakeMailServer = new Wiser();
            this.fakeMailServer.setPort(getMailServerPort());
            this.fakeMailServer.start();

            assertFalse("fake mail server didn't start", isMailServerStopped(fakeMailServer));

            Date dtStartWait = new Date();
            while (isMailServerStopped(fakeMailServer))
            {
                // test for connected
                if (this.fakeMailServer != null
                    && !isMailServerStopped(fakeMailServer))
                {
                    break;
                }

                // test for timeout
                if ((dtStartWait.getTime() + EmailConfiguration.TIME_OUT)
                    <= new Date().getTime())
                {
                    fail("Mail server failed to start");
                }
            }
        }
    }

    /**
     * Validate the message was sent properly
     * @param mailServer reference to the fake mail server
     * @param strSubject expected subject
     * @param fromAdd expected from address
     * @param toAdd list of expected to addresses
     * @param ccAdd list of expected cc addresses
     * @param bccAdd list of expected bcc addresses
     * @param boolSaveToFile true will output to file, false doesnt
     * @return WiserMessage email to check
     * @throws IOException Exception
     */
    protected WiserMessage validateSend(
        Wiser mailServer,
        String strSubject,
        InternetAddress fromAdd,
        List toAdd,
        List ccAdd,
        List bccAdd,
        boolean boolSaveToFile)
        throws IOException
    {
        assertTrue("mail server doesn't contain expected message",
                mailServer.getMessages().size() == 1);
        WiserMessage emailMessage = (WiserMessage) mailServer.getMessages().get(0);

        if (boolSaveToFile)
        {
            try
            {
                this.saveEmailToFile(emailMessage);
            }
            catch(MessagingException me)
            {
                IllegalStateException ise =
                    new IllegalStateException("caught MessagingException during saving the email");
                ise.initCause(me);
                throw ise;
            }
        }

        try
        {
            // get the MimeMessage
            MimeMessage mimeMessage = emailMessage.getMimeMessage();

            // test subject
            assertEquals("got wrong subject from mail",
                    strSubject, mimeMessage.getHeader("Subject", null));

            //test from address
            assertEquals("got wrong From: address from mail",
                    fromAdd.toString(), mimeMessage.getHeader("From", null));

            //test to address
            assertTrue("got wrong To: address from mail",
                toAdd.toString().indexOf(mimeMessage.getHeader("To", null)) != -1);

            //test cc address
            if (ccAdd.size() > 0)
            {
                assertTrue("got wrong Cc: address from mail",
                    ccAdd.toString().indexOf(mimeMessage.getHeader("Cc", null))
                        != -1);
            }

            //test bcc address
            if (bccAdd.size() > 0)
            {
                assertTrue("got wrong Bcc: address from mail",
                    bccAdd.toString().indexOf(mimeMessage.getHeader("Bcc", null))
                        != -1);
            }
        }
        catch (MessagingException me)
        {
            IllegalStateException ise =
                new IllegalStateException("caught MessagingException in validateSend()");
            ise.initCause(me);
            throw ise;
        }

        return emailMessage;
    }

    /**
     * Validate the message was sent properly
     * @param mailServer reference to the fake mail server
     * @param strSubject expected subject
     * @param content the expected message content
     * @param fromAdd expected from address
     * @param toAdd list of expected to addresses
     * @param ccAdd list of expected cc addresses
     * @param bccAdd list of expected bcc addresses
     * @param boolSaveToFile true will output to file, false doesnt
     * @throws IOException Exception
     */
    protected void validateSend(
        Wiser mailServer,
        String strSubject,
        Multipart content,
        InternetAddress fromAdd,
        List toAdd,
        List ccAdd,
        List bccAdd,
        boolean boolSaveToFile)
        throws IOException
    {
        // test other properties
        WiserMessage emailMessage = this.validateSend(
            mailServer,
            strSubject,
            fromAdd,
            toAdd,
            ccAdd,
            bccAdd,
            boolSaveToFile);

        // test message content

        // get sent email content
        String strSentContent =
            content.getContentType();
        // get received email content (chop off the auto-added \n
        // and -- (front and end)
        String emailMessageBody = getMessageBody(emailMessage);
        String strMessageBody =
            emailMessageBody.substring(BaseEmailTestCase.BODY_START_PAD,
                                       emailMessageBody.length()
                                       - BaseEmailTestCase.BODY_END_PAD);
        assertTrue("didn't find expected content type in message body",
                strMessageBody.indexOf(strSentContent) != -1);
    }

    /**
     * Validate the message was sent properly
     * @param mailServer reference to the fake mail server
     * @param strSubject expected subject
     * @param strMessage the expected message as a string
     * @param fromAdd expected from address
     * @param toAdd list of expected to addresses
     * @param ccAdd list of expected cc addresses
     * @param bccAdd list of expected bcc addresses
     * @param boolSaveToFile true will output to file, false doesnt
     * @throws IOException Exception
     */
    protected void validateSend(
        Wiser mailServer,
        String strSubject,
        String strMessage,
        InternetAddress fromAdd,
        List toAdd,
        List ccAdd,
        List bccAdd,
        boolean boolSaveToFile)
        throws IOException
    {
        // test other properties
        WiserMessage emailMessage = this.validateSend(
            mailServer,
            strSubject,
            fromAdd,
            toAdd,
            ccAdd,
            bccAdd,
            true);

        // test message content
        assertTrue("didn't find expected message content in message body",
                getMessageBody(emailMessage).indexOf(strMessage) != -1);
    }

    /**
     * Serializes the {@link MimeMessage} from the <code>WiserMessage
     * passed in. The headers are serialized first followed by the message
     * body.
     *
     * @param wiserMessage The <code>WiserMessage to serialize.
     * @return The string format of the message.
     * @throws MessagingException
     * @throws IOException
     *             Thrown while serializing the body from
     *             {@link DataHandler#writeTo(java.io.OutputStream)}.
     * @throws MessagingException
     *             Thrown while getting the body content from
     *             {@link MimeMessage#getDataHandler()}
     * @since 1.1
     */
    private String serializeEmailMessage(WiserMessage wiserMessage)
            throws MessagingException, IOException
    {
        if (wiserMessage == null)
        {
            return "";
        }

        StringBuffer serializedEmail = new StringBuffer();
        MimeMessage message = wiserMessage.getMimeMessage();

        // Serialize the headers
        for (Enumeration headers = message.getAllHeaders(); headers
                .hasMoreElements();)
        {
            Header header = (Header) headers.nextElement();
            serializedEmail.append(header.getName());
            serializedEmail.append(": ");
            serializedEmail.append(header.getValue());
            serializedEmail.append(LINE_SEPARATOR);
        }

        // Serialize the body
        byte[] messageBody = getMessageBodyBytes(message);

        serializedEmail.append(LINE_SEPARATOR);
        serializedEmail.append(messageBody);
        serializedEmail.append(LINE_SEPARATOR);

        return serializedEmail.toString();
    }

    /**
     * Returns a string representation of the message body. If the message body
     * cannot be read, an empty string is returned.
     *
     * @param wiserMessage The wiser message from which to extract the message body
     * @return The string representation of the message body
     * @throws IOException
     *             Thrown while serializing the body from
     *             {@link DataHandler#writeTo(java.io.OutputStream)}.
     * @since 1.1
     */
    private String getMessageBody(WiserMessage wiserMessage)
            throws IOException
    {
        if (wiserMessage == null)
        {
            return "";
        }

        byte[] messageBody = null;

        try
        {
            MimeMessage message = wiserMessage.getMimeMessage();
            messageBody = getMessageBodyBytes(message);
        }
        catch (MessagingException me)
        {
            // Thrown while getting the body content from
            // {@link MimeMessage#getDataHandler()}
            IllegalStateException ise =
                new IllegalStateException("couldn't process MimeMessage from WiserMessage in getMessageBody()");
            ise.initCause(me);
            throw ise;
        }

        return (messageBody != null) ? (new String(messageBody).intern()) : "";
    }

    /**
     * Gets the byte making up the body of the message.
     *
     * @param mimeMessage
     *            The mime message from which to extract the body.
     * @return A byte array representing the message body
     * @throws IOException
     *             Thrown while serializing the body from
     *             {@link DataHandler#writeTo(java.io.OutputStream)}.
     * @throws MessagingException
     *             Thrown while getting the body content from
     *             {@link MimeMessage#getDataHandler()}
     * @since 1.1
     */
    private byte[] getMessageBodyBytes(MimeMessage mimeMessage)
            throws IOException, MessagingException
    {
        DataHandler dataHandler = mimeMessage.getDataHandler();
        ByteArrayOutputStream byteArrayOutStream = new ByteArrayOutputStream();
        BufferedOutputStream buffOs = new BufferedOutputStream(
                byteArrayOutStream);
        dataHandler.writeTo(buffOs);
        buffOs.flush();

        return byteArrayOutStream.toByteArray();
    }

    /**
     * Checks if an email server is running at the address stored in the
     * <code>fakeMailServer.
     *
     * @param fakeMailServer
     *            The server from which the address is picked up.
     * @return <code>true if the server claims to be running
     * @since 1.1
     */
    protected boolean isMailServerStopped(Wiser fakeMailServer) {
        return !fakeMailServer.getServer().isRunning();
    }
}

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