diff -r 000000000000 -r 6474c204b198 modules/libjar/test/unit/test_umlaute.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/libjar/test/unit/test_umlaute.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,40 @@
+
+const Cc = Components.classes;
+const Ci = Components.interfaces;
+
+function run_test() {
+  var dirService = Cc["@mozilla.org/file/directory_service;1"].getService(Ci.nsIProperties); 
+  var tmpDir = dirService.get("TmpD", Ci.nsIFile); 
+
+  var zipfile = do_get_file("data/test_umlaute.zip");
+
+  var testFile = tmpDir.clone();
+  testFile.append("test_\u00FC.txt");
+  if (testFile.exists()) {
+    testFile.remove(false);
+  }
+
+  var zipreader = Cc["@mozilla.org/libjar/zip-reader;1"].createInstance(Ci.nsIZipReader);
+  zipreader.open(zipfile);
+
+  var entries = zipreader.findEntries(null);
+  do_check_true(entries.hasMore()); 
+
+  var entryName = entries.getNext();
+  do_check_eq(entryName, "test_\u00FC.txt");
+
+  do_check_true(zipreader.hasEntry(entryName));
+
+  var target = tmpDir.clone();
+  target.append(entryName);
+  target.create(Ci.nsILocalFile.NORMAL_FILE_TYPE, 6 * 64 + 4 * 8 + 0); // 0640
+
+  zipreader.extract(entryName, target);
+
+  var entry = zipreader.getEntry(entryName);
+  do_check_true(entry != null);
+
+  zipreader.test(entryName);
+
+  zipreader.close();
+}