diff -r 000000000000 -r 6474c204b198 intl/uconv/tests/unit/test_bug715319.dbcs.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/intl/uconv/tests/unit/test_bug715319.dbcs.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,54 @@
+// 2-byte charsets:
+const charsets = [ "Big5", "EUC-KR", "x-euc-tw", "x-johab" ]
+const ScriptableUnicodeConverter =
+	Components.Constructor("@mozilla.org/intl/scriptableunicodeconverter",
+			       "nsIScriptableUnicodeConverter");
+var gConverter;
+
+function error(inString, outString, msg) {
+    var dispIn = "";
+    var dispOut = "";
+    var i;
+    for (i = 0; i < inString.length; ++i) {
+	dispIn += " x" + inString.charCodeAt(i).toString(16);
+    }
+    if (outString.length == 0) {
+	dispOut = "<empty>";
+    } else {
+	for (i = 0; i < outString.length; ++i) {
+	    dispOut += " x" + outString.charCodeAt(i).toString(16);
+	}
+    }
+    dump("\"" + dispIn + "\" ==> \"" + dispOut + "\"\n");
+    do_throw("security risk: " + msg);
+}
+
+function IsASCII(charCode) {
+    return (charCode <= 0x7e);
+}
+
+function test(inString) {
+    var outString = gConverter.ConvertToUnicode(inString) +
+	            gConverter.Finish();
+
+    var outLen = outString.length;
+
+    if (IsASCII(inString.charCodeAt(1)) && 
+	(outLen < 4 || outString.charCodeAt(outLen - 4) == 0xFFFD)) {
+	error(inString, outString, "ASCII input eaten in " + gConverter.charset);
+    }
+}
+
+function run_test() {
+    gConverter = new ScriptableUnicodeConverter();
+    for (var i = 0; i < charsets.length; ++i) {
+	gConverter.charset = charsets[i];
+
+	var byte1, byte2;
+	for (byte1 = 1; byte1 < 0x100; ++byte1) {
+	    for (byte2 = 1; byte2 < 0x100; ++byte2) {
+		test(String.fromCharCode(byte1, byte2) + "foo");
+	    }
+	}
+    }
+}