gt:         final ArrayList<Part> attach4 = new ArrayList<Part>();
context: /*
   * Copyright (C) 2008 The Android Open Source Project
   *
   * Licensed 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 com.android.emailcommon.internet;
  
  import com.android.emailcommon.internet.MimeBodyPart;
  import com.android.emailcommon.internet.MimeHeader;
  import com.android.emailcommon.internet.MimeUtility;
  import com.android.emailcommon.internet.TextBody;
  import com.android.emailcommon.mail.BodyPart;
  import com.android.emailcommon.mail.Message;
  import com.android.emailcommon.mail.MessageTestUtils;
  import com.android.emailcommon.mail.MessagingException;
  import com.android.emailcommon.mail.Part;
  import com.android.emailcommon.mail.MessageTestUtils.MessageBuilder;
  import com.android.emailcommon.mail.MessageTestUtils.MultipartBuilder;
  
  import android.test.suitebuilder.annotation.SmallTest;
  
  import java.util.ArrayList;
  
  import junit.framework.TestCase;
  
  /**
   * This is a series of unit tests for the MimeUtility class.  These tests must be locally
   * complete - no server(s) required.
   */
  @SmallTest
  public class MimeUtilityTest extends TestCase {
  
      /** up arrow, down arrow, left arrow, right arrow */
      private final String SHORT_UNICODE = "\u2191\u2193\u2190\u2192";
      private final String SHORT_UNICODE_ENCODED = "=?UTF-8?B?4oaR4oaT4oaQ4oaS?=";
  
      /** dollar and euro sign */
      private final String PADDED2_UNICODE = "$\u20AC";
      private final String PADDED2_UNICODE_ENCODED = "=?UTF-8?B?JOKCrA==?=";
      private final String PADDED1_UNICODE = "$$\u20AC";
      private final String PADDED1_UNICODE_ENCODED = "=?UTF-8?B?JCTigqw=?=";
      private final String PADDED0_UNICODE = "$$$\u20AC";
      private final String PADDED0_UNICODE_ENCODED = "=?UTF-8?B?JCQk4oKs?=";
  
      /** a string without any unicode */
      private final String SHORT_PLAIN = "abcd";
  
      /** long subject which will be split into two MIME/Base64 chunks */
      private final String LONG_UNICODE_SPLIT =
          "$" +
          "\u20AC\u20AC\u20AC\u20AC\u20AC\u20AC\u20AC\u20AC\u20AC\u20AC" +
          "\u20AC\u20AC\u20AC\u20AC\u20AC\u20AC\u20AC\u20AC\u20AC\u20AC";
      private final String LONG_UNICODE_SPLIT_ENCODED =
          "=?UTF-8?B?JOKCrOKCrOKCrOKCrOKCrOKCrOKCrOKCrA==?=" + "\r\n " +
          "=?UTF-8?B?4oKs4oKs4oKs4oKs4oKs4oKs4oKs4oKs4oKs4oKs4oKs4oKs?=";
  
      /** strings that use supplemental characters and really stress encode/decode */
      // actually it's U+10400
      private final String SHORT_SUPPLEMENTAL = "\uD801\uDC00";
      private final String SHORT_SUPPLEMENTAL_ENCODED = "=?UTF-8?B?8JCQgA==?=";
      private final String LONG_SUPPLEMENTAL = SHORT_SUPPLEMENTAL + SHORT_SUPPLEMENTAL +
          SHORT_SUPPLEMENTAL + SHORT_SUPPLEMENTAL + SHORT_SUPPLEMENTAL + SHORT_SUPPLEMENTAL +
          SHORT_SUPPLEMENTAL + SHORT_SUPPLEMENTAL + SHORT_SUPPLEMENTAL + SHORT_SUPPLEMENTAL;
      private final String LONG_SUPPLEMENTAL_ENCODED =
          "=?UTF-8?B?8JCQgPCQkIDwkJCA8JCQgA==?=" + "\r\n " +
          "=?UTF-8?B?8JCQgPCQkIDwkJCA8JCQgPCQkIDwkJCA?=";
      private final String LONG_SUPPLEMENTAL_2 = "a" + SHORT_SUPPLEMENTAL + SHORT_SUPPLEMENTAL +
          SHORT_SUPPLEMENTAL + SHORT_SUPPLEMENTAL + SHORT_SUPPLEMENTAL + SHORT_SUPPLEMENTAL +
          SHORT_SUPPLEMENTAL + SHORT_SUPPLEMENTAL + SHORT_SUPPLEMENTAL + SHORT_SUPPLEMENTAL;
      private final String LONG_SUPPLEMENTAL_ENCODED_2 =
          "=?UTF-8?B?YfCQkIDwkJCA8JCQgPCQkIA=?=" + "\r\n " +
          "=?UTF-8?B?8JCQgPCQkIDwkJCA8JCQgPCQkIDwkJCA?=";
      // Earth is U+1D300.
      private final String LONG_SUPPLEMENTAL_QP =
          "*Monogram for Earth \uD834\uDF00. Monogram for Human \u268b.";
      private final String LONG_SUPPLEMENTAL_QP_ENCODED =
          "=?UTF-8?Q?*Monogram_for_Earth_?=" + "\r\n " +
          "=?UTF-8?Q?=F0=9D=8C=80._Monogram_for_Human_=E2=9A=8B.?=";
  
      /** a typical no-param header */
      private final String HEADER_NO_PARAMETER =
              "header";
      /** a typical multi-param header */
      private final String HEADER_MULTI_PARAMETER =
              "header; Param1Name=Param1Value; Param2Name=Param2Value";
      /** a multi-param header with quoting */
      private final String HEADER_QUOTED_MULTI_PARAMETER =
              "header; Param1Name=\"Param1Value\"; Param2Name=\"Param2Value\"";
      /** a malformed header we're seeing in production servers */
      private final String HEADER_MALFORMED_PARAMETER =
              "header; Param1Name=Param1Value; filename";
  
      /**
       * a string generated by google calendar that contains two interesting gotchas:
       * 1.  Uses windows-1252 encoding, and en-dash recoded appropriately (\u2013 / =96)
       * 2.  Because the first encoded char requires '=XX' encoding, we create an "internal"
       *     "?=" that the decoder must correctly skip over.
       **/
      private final String CALENDAR_SUBJECT_UNICODE =
          "=?windows-1252?Q?=5BReminder=5D_test_=40_Fri_Mar_20_10=3A30am_=96_11am_=28andro?=" +
          "\r\n\t" +
          "=?windows-1252?Q?id=2Etr=40gmail=2Ecom=29?=";
      private final String CALENDAR_SUBJECT_PLAIN =
          "[Reminder] test @ Fri Mar 20 10:30am \u2013 11am (android.tr@gmail.com)";
  
      /**
       * Some basic degenerate strings designed to exercise error handling in the decoder
       */
      private final String CALENDAR_DEGENERATE_UNICODE_1 =
          "=?windows-1252?Q=5B?=";
      private final String CALENDAR_DEGENERATE_UNICODE_2 =
          "=?windows-1252Q?=5B?=";
      private final String CALENDAR_DEGENERATE_UNICODE_3 =
          "=?windows-1252?=";
      private final String CALENDAR_DEGENERATE_UNICODE_4 =
          "=?windows-1252";
  
      /**
       * Test that decode/unfold is efficient when it can be
       */
      public void testEfficientUnfoldAndDecode() {
          String result1 = MimeUtility.unfold(SHORT_PLAIN);
          String result2 = MimeUtility.decode(SHORT_PLAIN);
          String result3 = MimeUtility.unfoldAndDecode(SHORT_PLAIN);
  
          assertSame(SHORT_PLAIN, result1);
          assertSame(SHORT_PLAIN, result2);
          assertSame(SHORT_PLAIN, result3);
      }
  
      // TODO:  more tests for unfold(String s)
  
      /**
       * Test that decode is working for simple strings
       */
      public void testDecodeSimple() {
          String result1 = MimeUtility.decode(SHORT_UNICODE_ENCODED);
          assertEquals(SHORT_UNICODE, result1);
      }
  
      // TODO:  tests for decode(String s)
  
      /**
       * Test that unfoldAndDecode is working for simple strings
       */
      public void testUnfoldAndDecodeSimple() {
          String result1 = MimeUtility.unfoldAndDecode(SHORT_UNICODE_ENCODED);
          assertEquals(SHORT_UNICODE, result1);
      }
  
      /**
       * test decoding complex string from google calendar that has two gotchas for the decoder.
       * also tests a couple of degenerate cases that should "fail" decoding and pass through.
       */
      public void testComplexDecode() {
          String result1 = MimeUtility.unfoldAndDecode(CALENDAR_SUBJECT_UNICODE);
          assertEquals(CALENDAR_SUBJECT_PLAIN, result1);
  
          // These degenerate cases should "fail" and return the same string
          String degenerate1 = MimeUtility.unfoldAndDecode(CALENDAR_DEGENERATE_UNICODE_1);
          assertEquals("degenerate case 1", CALENDAR_DEGENERATE_UNICODE_1, degenerate1);
          String degenerate2 = MimeUtility.unfoldAndDecode(CALENDAR_DEGENERATE_UNICODE_2);
          assertEquals("degenerate case 2", CALENDAR_DEGENERATE_UNICODE_2, degenerate2);
          String degenerate3 = MimeUtility.unfoldAndDecode(CALENDAR_DEGENERATE_UNICODE_3);
          assertEquals("degenerate case 3", CALENDAR_DEGENERATE_UNICODE_3, degenerate3);
          String degenerate4 = MimeUtility.unfoldAndDecode(CALENDAR_DEGENERATE_UNICODE_4);
          assertEquals("degenerate case 4", CALENDAR_DEGENERATE_UNICODE_4, degenerate4);
      }
  
      // TODO:  more tests for unfoldAndDecode(String s)
  
      /**
       * Test that fold/encode is efficient when it can be
       */
      public void testEfficientFoldAndEncode() {
          String result1 = MimeUtility.foldAndEncode(SHORT_PLAIN);
          String result2 = MimeUtility.foldAndEncode2(SHORT_PLAIN, 10);
          String result3 = MimeUtility.fold(SHORT_PLAIN, 10);
  
          assertSame(SHORT_PLAIN, result1);
          assertSame(SHORT_PLAIN, result2);
          assertSame(SHORT_PLAIN, result3);
      }
  
      /**
       * Test about base64 padding variety.
       */
      public void testPaddingOfFoldAndEncode2() {
          String result1 = MimeUtility.foldAndEncode2(PADDED2_UNICODE, 0);
          String result2 = MimeUtility.foldAndEncode2(PADDED1_UNICODE, 0);
          String result3 = MimeUtility.foldAndEncode2(PADDED0_UNICODE, 0);
  
          assertEquals("padding 2", PADDED2_UNICODE_ENCODED, result1);
          assertEquals("padding 1", PADDED1_UNICODE_ENCODED, result2);
          assertEquals("padding 0", PADDED0_UNICODE_ENCODED, result3);
      }
  
      // TODO:  more tests for foldAndEncode(String s)
  
      /**
       * Test that foldAndEncode2 is working for simple strings
       */
      public void testFoldAndEncode2() {
          String result1 = MimeUtility.foldAndEncode2(SHORT_UNICODE, 10);
          assertEquals(SHORT_UNICODE_ENCODED, result1);
      }
  
      /**
       * Test that foldAndEncode2 is working for long strings which needs splitting.
       */
      public void testFoldAndEncode2WithLongSplit() {
          String result = MimeUtility.foldAndEncode2(LONG_UNICODE_SPLIT, "Subject: ".length());
  
          assertEquals("long string", LONG_UNICODE_SPLIT_ENCODED, result);
      }
  
      /**
       * Tests of foldAndEncode2 that involve supplemental characters (UTF-32)
       *
       * Note that the difference between LONG_SUPPLEMENTAL and LONG_SUPPLEMENTAL_2 is the
       * insertion of a single character at the head of the string. This is intended to disrupt
       * the code that splits the long string into multiple encoded words, and confirm that it
       * properly applies the breaks between UTF-32 code points.
       */
      public void testFoldAndEncode2Supplemental() {
          String result1 = MimeUtility.foldAndEncode2(SHORT_SUPPLEMENTAL, "Subject: ".length());
          String result2 = MimeUtility.foldAndEncode2(LONG_SUPPLEMENTAL, "Subject: ".length());
          String result3 = MimeUtility.foldAndEncode2(LONG_SUPPLEMENTAL_2, "Subject: ".length());
          assertEquals("short supplemental", SHORT_SUPPLEMENTAL_ENCODED, result1);
          assertEquals("long supplemental", LONG_SUPPLEMENTAL_ENCODED, result2);
          assertEquals("long supplemental 2", LONG_SUPPLEMENTAL_ENCODED_2, result3);
      }
  
      /**
       * Tests of foldAndEncode2 that involve supplemental characters (UTF-32)
       *
       * Note that the difference between LONG_SUPPLEMENTAL and LONG_SUPPLEMENTAL_QP is that
       * the former will be encoded as base64 but the latter will be encoded as quoted printable.
       */
      public void testFoldAndEncode2SupplementalQuotedPrintable() {
          String result = MimeUtility.foldAndEncode2(LONG_SUPPLEMENTAL_QP, "Subject: ".length());
          assertEquals("long supplement quoted printable",
                       LONG_SUPPLEMENTAL_QP_ENCODED, result);
      }
  
      // TODO:  more tests for foldAndEncode2(String s)
      // TODO:  more tests for fold(String s, int usedCharacters)
  
      /**
       * Basic tests of getHeaderParameter()
       *
       * Typical header value:  multipart/mixed; boundary="----E5UGTXUQQJV80DR8SJ88F79BRA4S8K"
       *
       * Function spec says:
       *  if header is null:  return null
       *  if name is null:    if params, return first param.  else return full field
       *  else:               if param is found (case insensitive) return it
       *                        else return null
       */
      public void testGetHeaderParameter() {
          // if header is null, return null
          assertNull("null header check", MimeUtility.getHeaderParameter(null, "name"));
  
          // if name is null, return first param or full header
          // NOTE:  The docs are wrong - it returns the header (no params) in that case
  //      assertEquals("null name first param per docs", "Param1Value",
  //              MimeUtility.getHeaderParameter(HEADER_MULTI_PARAMETER, null));
          assertEquals("null name first param per code", "header",
                  MimeUtility.getHeaderParameter(HEADER_MULTI_PARAMETER, null));
          assertEquals("null name full header", HEADER_NO_PARAMETER,
                  MimeUtility.getHeaderParameter(HEADER_NO_PARAMETER, null));
  
          // find name
          assertEquals("get 1st param", "Param1Value",
                  MimeUtility.getHeaderParameter(HEADER_MULTI_PARAMETER, "Param1Name"));
          assertEquals("get 2nd param", "Param2Value",
                  MimeUtility.getHeaderParameter(HEADER_MULTI_PARAMETER, "Param2Name"));
          assertEquals("get missing param", null,
                  MimeUtility.getHeaderParameter(HEADER_MULTI_PARAMETER, "Param3Name"));
  
          // case insensitivity
          assertEquals("get 2nd param all LC", "Param2Value",
                  MimeUtility.getHeaderParameter(HEADER_MULTI_PARAMETER, "param2name"));
          assertEquals("get 2nd param all UC", "Param2Value",
                  MimeUtility.getHeaderParameter(HEADER_MULTI_PARAMETER, "PARAM2NAME"));
  
          // quoting
          assertEquals("get 1st param", "Param1Value",
                  MimeUtility.getHeaderParameter(HEADER_QUOTED_MULTI_PARAMETER, "Param1Name"));
          assertEquals("get 2nd param", "Param2Value",
                  MimeUtility.getHeaderParameter(HEADER_QUOTED_MULTI_PARAMETER, "Param2Name"));
  
          // Don't fail when malformed
          assertEquals("malformed filename param", null,
                  MimeUtility.getHeaderParameter(HEADER_MALFORMED_PARAMETER, "filename"));
      }
  
      // TODO:  tests for findFirstPartByMimeType(Part part, String mimeType)
  
      /** Tests for findPartByContentId(Part part, String contentId) */
      public void brokentestCollectParts() throws MessagingException, Exception {
          // golden cases; these will marked as attachments
          final String cid1 = "<i_12e8248b4f0874cb>";
          final Part cid1bp = MessageTestUtils.bodyPart("image/gif; name=\"im1.gif\"", cid1);
          final String cid2 = "<ii_12e8248b4f0874cb>";
          final Part cid2bp = MessageTestUtils.bodyPart("image/gif", cid2);
          cid2bp.addHeader(MimeHeader.HEADER_CONTENT_DISPOSITION, "inline; filename=\"im2.gif\"");
          final String cid3 = "<iii_12e8248b4f0874cb>";
          final Part cid3bp = MessageTestUtils.bodyPart("image/gif", cid3);
          cid3bp.addHeader(MimeHeader.HEADER_CONTENT_DISPOSITION, "attachment; filename=\"im3.gif\"");
          // error cases; these will NOT be marked as attachments
          final String cid4 = "<iv_12e8248b4f0874cb>";
          final Part cid4bp = MessageTestUtils.bodyPart("image/gif", cid4);  // no name attr
          final String cid5 = "<v_12e8248b4f0874cb>";
          final Part cid5bp = MessageTestUtils.bodyPart("image/gif", cid5);
          cid5bp.addHeader(MimeHeader.HEADER_CONTENT_DISPOSITION, "inline"); // no filename attr
  
          // Default content disposition
          final ArrayList<Part> view1 = new ArrayList<Part>();
          final ArrayList<Part> attach1 = new ArrayList<Part>();
          MimeUtility.collectParts(cid1bp, view1, attach1);
          assertEquals(1, attach1.size());
          assertEquals(attach1.get(0), cid1bp);
  
          // Explicit content disposition of "inline"
          final ArrayList<Part> view2 = new ArrayList<Part>();
          final ArrayList<Part> attach2 = new ArrayList<Part>();
          MimeUtility.collectParts(cid2bp, view2, attach2);
          assertEquals(1, attach2.size());
          assertEquals(attach2.get(0), cid2bp);
  
          // Explicit content disposition of "attachment"
          final ArrayList<Part> view3 = new ArrayList<Part>();
          final ArrayList<Part> attach3 = new ArrayList<Part>();
          MimeUtility.collectParts(cid3bp, view3, attach3);
          assertEquals(1, attach3.size());
          assertEquals(attach3.get(0), cid3bp);
  
          // Default content disposition; missing name attribute on content-type
          final ArrayList<Part> view4 = new ArrayList<Part>();
  