@Test
  public void testMultipartPlainTextMessage() throws MessagingException {
    String bodyText1 = "text body 1";
    String bodyText2 = "text body 2";

    // Create text/plain bodies
    TextBody body1 = new TextBody(bodyText1);
    TextBody body2 = new TextBody(bodyText2);

    // Create multipart/mixed part
    MimeMultipart multipart = MimeMultipart.newInstance();
    MimeBodyPart bodyPart1 = new MimeBodyPart(body1, "text/plain");
    MimeBodyPart bodyPart2 = new MimeBodyPart(body2, "text/plain");
    multipart.addBodyPart(bodyPart1);
    multipart.addBodyPart(bodyPart2);

    // Create message
    MimeMessage message = new MimeMessage();
    MimeMessageHelper.setBody(message, multipart);

    // Extract text
    List<Part> outputNonViewableParts = new ArrayList<>();
    ArrayList<Viewable> outputViewableParts = new ArrayList<>();
    MessageExtractor.findViewablesAndAttachments(
        message, outputViewableParts, outputNonViewableParts);
    ViewableExtractedText container =
        messageViewInfoExtractor.extractTextFromViewables(outputViewableParts);

    String expectedText =
        bodyText1
            + "\r\n\r\n"
            + "------------------------------------------------------------------------\r\n\r\n"
            + bodyText2;
    String expectedHtml =
        "<pre class=\"k9mail\">"
            + bodyText1
            + "</pre>"
            + "<p style=\"margin-top: 2.5em; margin-bottom: 1em; "
            + "border-bottom: 1px solid #000\"></p>"
            + "<pre class=\"k9mail\">"
            + bodyText2
            + "</pre>";

    assertEquals(expectedText, container.text);
    assertEquals(expectedHtml, getHtmlBodyText(container.html));
  }
  @Test
  public void testTextPlusRfc822Message() throws MessagingException {
    K9ActivityCommon.setLanguage(context, "en");
    Locale.setDefault(Locale.US);
    TimeZone.setDefault(TimeZone.getTimeZone("GMT+01:00"));

    String innerBodyText = "Hey there. I'm inside a message/rfc822 (inline) attachment.";

    // Create text/plain body
    TextBody textBody = new TextBody(BODY_TEXT);

    // Create inner text/plain body
    TextBody innerBody = new TextBody(innerBodyText);

    // Create message/rfc822 body
    MimeMessage innerMessage = new MimeMessage();
    innerMessage.addSentDate(new Date(112, 02, 17), false);
    innerMessage.setRecipients(RecipientType.TO, new Address[] {new Address("*****@*****.**")});
    innerMessage.setSubject("Subject");
    innerMessage.setFrom(new Address("*****@*****.**"));
    MimeMessageHelper.setBody(innerMessage, innerBody);

    // Create multipart/mixed part
    MimeMultipart multipart = MimeMultipart.newInstance();
    MimeBodyPart bodyPart1 = new MimeBodyPart(textBody, "text/plain");
    MimeBodyPart bodyPart2 = new MimeBodyPart(innerMessage, "message/rfc822");
    bodyPart2.setHeader("Content-Disposition", "inline; filename=\"message.eml\"");
    multipart.addBodyPart(bodyPart1);
    multipart.addBodyPart(bodyPart2);

    // Create message
    MimeMessage message = new MimeMessage();
    MimeMessageHelper.setBody(message, multipart);

    // Extract text
    List<Part> outputNonViewableParts = new ArrayList<Part>();
    ArrayList<Viewable> outputViewableParts = new ArrayList<>();
    MessageExtractor.findViewablesAndAttachments(
        message, outputViewableParts, outputNonViewableParts);
    ViewableExtractedText container =
        messageViewInfoExtractor.extractTextFromViewables(outputViewableParts);

    String expectedText =
        BODY_TEXT
            + "\r\n\r\n"
            + "----- message.eml ------------------------------------------------------"
            + "\r\n\r\n"
            + "From: [email protected]"
            + "\r\n"
            + "To: [email protected]"
            + "\r\n"
            + "Sent: Sat Mar 17 00:00:00 GMT+01:00 2012"
            + "\r\n"
            + "Subject: Subject"
            + "\r\n"
            + "\r\n"
            + innerBodyText;
    String expectedHtml =
        "<pre class=\"k9mail\">"
            + BODY_TEXT_HTML
            + "</pre>"
            + "<p style=\"margin-top: 2.5em; margin-bottom: 1em; border-bottom: "
            + "1px solid #000\">message.eml</p>"
            + "<table style=\"border: 0\">"
            + "<tr>"
            + "<th style=\"text-align: left; vertical-align: top;\">From:</th>"
            + "<td>[email protected]</td>"
            + "</tr><tr>"
            + "<th style=\"text-align: left; vertical-align: top;\">To:</th>"
            + "<td>[email protected]</td>"
            + "</tr><tr>"
            + "<th style=\"text-align: left; vertical-align: top;\">Sent:</th>"
            + "<td>Sat Mar 17 00:00:00 GMT+01:00 2012</td>"
            + "</tr><tr>"
            + "<th style=\"text-align: left; vertical-align: top;\">Subject:</th>"
            + "<td>Subject</td>"
            + "</tr>"
            + "</table>"
            + "<pre class=\"k9mail\">"
            + innerBodyText
            + "</pre>";

    assertEquals(expectedText, container.text);
    assertEquals(expectedHtml, getHtmlBodyText(container.html));
  }