diff -r 000000000000 -r 6474c204b198 xpcom/tests/unit/test_localfile.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/xpcom/tests/unit/test_localfile.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,151 @@
+/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* 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 Cr = Components.results;
+const CC = Components.Constructor;
+const Ci = Components.interfaces;
+
+const MAX_TIME_DIFFERENCE = 2500;
+const MILLIS_PER_DAY      = 1000 * 60 * 60 * 24;
+
+var LocalFile = CC("@mozilla.org/file/local;1", "nsILocalFile", "initWithPath");
+
+function run_test()
+{
+  test_toplevel_parent_is_null();
+  test_normalize_crash_if_media_missing();
+  test_file_modification_time();
+  test_directory_modification_time();
+  test_diskSpaceAvailable();
+}
+
+function test_toplevel_parent_is_null()
+{
+  try
+  {
+    var lf = new LocalFile("C:\\");
+
+    // not required by API, but a property on which the implementation of
+    // parent == null relies for correctness
+    do_check_true(lf.path.length == 2);
+
+    do_check_true(lf.parent === null);
+  }
+  catch (e)
+  {
+    // not Windows
+    do_check_eq(e.result, Cr.NS_ERROR_FILE_UNRECOGNIZED_PATH);
+  }
+}
+
+function test_normalize_crash_if_media_missing()
+{
+  const a="a".charCodeAt(0);
+  const z="z".charCodeAt(0);
+  for (var i = a; i <= z; ++i)
+  {
+    try
+    {
+      LocalFile(String.fromCharCode(i)+":.\\test").normalize();
+    }
+    catch (e)
+    {
+    }
+  }
+}
+
+// Tests that changing a file's modification time is possible   
+function test_file_modification_time()
+{
+  var file = do_get_profile();
+  file.append("testfile");
+
+  // Should never happen but get rid of it anyway
+  if (file.exists())
+    file.remove(true);
+
+  var now = Date.now();
+  file.create(Ci.nsIFile.NORMAL_FILE_TYPE, 0644);
+  do_check_true(file.exists());
+
+  // Modification time may be out by up to 2 seconds on FAT filesystems. Test
+  // with a bit of leeway, close enough probably means it is correct.
+  var diff = Math.abs(file.lastModifiedTime - now);
+  do_check_true(diff < MAX_TIME_DIFFERENCE);
+
+  var yesterday = now - MILLIS_PER_DAY;
+  file.lastModifiedTime = yesterday;
+
+  diff = Math.abs(file.lastModifiedTime - yesterday);
+  do_check_true(diff < MAX_TIME_DIFFERENCE);
+
+  var tomorrow = now - MILLIS_PER_DAY;
+  file.lastModifiedTime = tomorrow;
+
+  diff = Math.abs(file.lastModifiedTime - tomorrow);
+  do_check_true(diff < MAX_TIME_DIFFERENCE);
+
+  var bug377307 = 1172950238000;
+  file.lastModifiedTime = bug377307;
+
+  diff = Math.abs(file.lastModifiedTime - bug377307);
+  do_check_true(diff < MAX_TIME_DIFFERENCE);
+
+  file.remove(true);
+}
+
+// Tests that changing a directory's modification time is possible   
+function test_directory_modification_time()
+{
+  var dir = do_get_profile();
+  dir.append("testdir");
+
+  // Should never happen but get rid of it anyway
+  if (dir.exists())
+    dir.remove(true);
+
+  var now = Date.now();
+  dir.create(Ci.nsIFile.DIRECTORY_TYPE, 0755);
+  do_check_true(dir.exists());
+
+  // Modification time may be out by up to 2 seconds on FAT filesystems. Test
+  // with a bit of leeway, close enough probably means it is correct.
+  var diff = Math.abs(dir.lastModifiedTime - now);
+  do_check_true(diff < MAX_TIME_DIFFERENCE);
+
+  var yesterday = now - MILLIS_PER_DAY;
+  dir.lastModifiedTime = yesterday;
+
+  diff = Math.abs(dir.lastModifiedTime - yesterday);
+  do_check_true(diff < MAX_TIME_DIFFERENCE);
+
+  var tomorrow = now - MILLIS_PER_DAY;
+  dir.lastModifiedTime = tomorrow;
+
+  diff = Math.abs(dir.lastModifiedTime - tomorrow);
+  do_check_true(diff < MAX_TIME_DIFFERENCE);
+
+  dir.remove(true);
+}
+
+function test_diskSpaceAvailable()
+{
+  let file = do_get_profile();
+  file.QueryInterface(Ci.nsILocalFile);
+
+  let bytes = file.diskSpaceAvailable;
+  do_check_true(bytes > 0);
+
+  file.append("testfile");
+  if (file.exists())
+    file.remove(true);
+  file.create(Ci.nsIFile.NORMAL_FILE_TYPE, parseInt("644", 8));
+
+  bytes = file.diskSpaceAvailable;
+  do_check_true(bytes > 0);
+
+  file.remove(true);
+}