Bug 959047 - Part 2: xpcshell test for alignStoredFiles(). r=aklotz

modules/libjar/zipwriter/test/unit/test_alignment.js

@@ -0,0 +1,113 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+const DATA = "ZIP WRITER TEST DATA";
+const FILENAME = "test_data.txt";
+const CRC = 0xe6164331;
+const time = 1199145600000; // Jan 1st 2008
+
+var TESTS = [
+  {
+    name: "test.txt",
+    compression: Ci.nsIZipWriter.COMPRESSION_DEFAULT
+  },
+  {
+    name: "test.png",
+    compression: Ci.nsIZipWriter.COMPRESSION_NONE
+  }
+];
+
+function swap16(n)
+{
+  return (((n >> 8) & 0xFF) <<  0) |
+         (((n >>  0) & 0xFF) << 8);
+}
+
+function swap32(n)
+{
+  return (((n >> 24) & 0xFF) <<  0) |
+         (((n >> 16) & 0xFF) <<  8) |
+         (((n >>  8) & 0xFF) << 16) |
+         (((n >>  0) & 0xFF) << 24);
+}
+
+function move_to_data(bis, offset)
+{
+  bis.readBytes(18); // Move to compressed size
+  var size = swap32(bis.read32());
+  bis.readBytes(4);
+  var file_len = swap16(bis.read16());
+  var extra_len = swap16(bis.read16());
+  var file = bis.readBytes(file_len);
+  bis.readBytes(extra_len);
+  offset += ZIP_FILE_HEADER_SIZE + file_len + extra_len;
+
+  return {offset: offset, size: size};
+}
+
+function test_alignment(align_size)
+{
+  // Create zip for testing.
+  zipW.open(tmpFile, PR_RDWR | PR_CREATE_FILE | PR_TRUNCATE);
+  for (var i = 0; i < TESTS.length; i++) {
+    var source = do_get_file(DATA_DIR + TESTS[i].name);
+    zipW.addEntryFile(TESTS[i].name, TESTS[i].compression, source, false);
+  }
+  var stream = Cc["@mozilla.org/io/string-input-stream;1"]
+                .createInstance(Ci.nsIStringInputStream);
+  stream.setData(DATA, DATA.length);
+  zipW.addEntryStream(FILENAME, time * PR_USEC_PER_MSEC,
+                      Ci.nsIZipWriter.COMPRESSION_NONE, stream, false);
+  zipW.alignStoredFiles(align_size);
+  zipW.close();
+
+  // Check data can be decompressed.
+  var zipR = new ZipReader(tmpFile);
+  var stream = Cc["@mozilla.org/scriptableinputstream;1"]
+                .createInstance(Ci.nsIScriptableInputStream);
+  stream.init(zipR.getInputStream(FILENAME));
+  var result = stream.read(DATA.length);
+  do_check_eq(result, DATA);
+  stream.close();
+  zipR.close();
+
+  // Check data is correct and aligned.
+  var fis = Cc["@mozilla.org/network/file-input-stream;1"]
+                 .createInstance(Ci.nsIFileInputStream);
+  fis.init(tmpFile, -1, -1, null);
+  let bis = Cc["@mozilla.org/binaryinputstream;1"]
+              .createInstance(Ci.nsIBinaryInputStream);
+  bis.setInputStream(fis);
+  var offset = 0;
+
+  var ret = move_to_data(bis, offset); // "test.txt"
+  offset = ret.offset;
+  bis.readBytes(ret.size);
+  offset += ret.size;
+
+  ret = move_to_data(bis, offset); // "test.png"
+  offset = ret.offset;
+  do_check_eq(offset % align_size, 0);
+  bis.readBytes(ret.size);
+  offset += ret.size;
+
+  ret = move_to_data(bis, offset); // "test_data.txt"
+  offset = ret.offset;
+  var result = bis.readBytes(DATA.length);
+  do_check_eq(result, DATA);
+  do_check_eq(offset % align_size, 0);
+
+  fis.close();
+  bis.close();
+}
+
+function run_test()
+{
+  test_alignment(2);
+  test_alignment(4);
+  test_alignment(16);
+  test_alignment(4096);
+  test_alignment(32768);
+}

modules/libjar/zipwriter/test/unit/xpcshell.ini

@@ -34,3 +34,4 @@ support-files =
 [test_zipcomment.js]
 [test_zippermissions.js]
 [test_bug717061.js]
+[test_alignment.js]