diff -r 000000000000 -r 6474c204b198 intl/uconv/tests/unit/test_bug449578.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/intl/uconv/tests/unit/test_bug449578.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,55 @@
+/* Tests conversion from ISO-2022-KR to Unicode (bug 449578)
+ */
+
+// designator sequence at beginning of line - legal
+const in1 = "%1B$)C%0E0!3*4Y6s%0F 1234";     
+// empty non-ASCII sequence -- illegal
+const in2 = "%1B$)Cab%0E%0Fcd";
+// designator sequence not at beginning of line - illegal
+const in3 = "abc %1B$)C%0E0!3*4Y6s%0F 1234";
+
+const expected1 = "\uAC00\uB098\uB2E4\uB77C 1234";
+const expected2 = "ab\uFFFD\cd";
+const expected3 = "abc \u001B$)C\uAC00\uB098\uB2E4\uB77C 1234";
+
+function testCase(inStr, expected)
+{
+    var dataURI = "data:text/plain;charset=ISO-2022-KR," + inStr;
+
+    var IOService = Components.Constructor("@mozilla.org/network/io-service;1",
+					 "nsIIOService");
+    var ConverterInputStream =
+	Components.Constructor("@mozilla.org/intl/converter-input-stream;1",
+			       "nsIConverterInputStream",
+			       "init");
+
+    var ios = new IOService();
+    var channel = ios.newChannel(dataURI, "", null);
+    var testInputStream = channel.open();
+    var testConverter = new ConverterInputStream(testInputStream,
+						 "ISO-2022-KR",
+						 8192,
+						 0xFFFD);
+
+    if (!(testConverter instanceof
+	  Components.interfaces.nsIUnicharLineInputStream))
+	throw "not line input stream";
+
+    var outStr = "";
+    var more;
+    do {
+	// read the line and check for eof
+	var line = {};
+	more = testConverter.readLine(line);
+	outStr += line.value;
+    } while (more);
+
+    do_check_eq(outStr, expected);
+}
+    
+function run_test()
+{
+    testCase(in1, expected1);
+    testCase(in2, expected2);
+    testCase(in3, expected3);
+}