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diff --git a/js/src/tests/ecma_5/Global/parseInt-01.js b/js/src/tests/ecma_5/Global/parseInt-01.js
new file mode 100644
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+++ b/js/src/tests/ecma_5/Global/parseInt-01.js
@@ -0,0 +1,170 @@
+// Any copyright is dedicated to the Public Domain.
+// http://creativecommons.org/licenses/publicdomain/
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 577536;
+var summary = "ES5 15.1.2.2 parseInt(string, radix)";
+
+print(BUGNUMBER + ": " + summary);
+
+/**************
+ * BEGIN TEST *
+ **************/
+
+var str, radix;
+var upvar;
+
+/* 1. Let inputString be ToString(string). */
+
+assertEq(parseInt({ toString: function() { return "17" } }, 10), 17);
+
+upvar = 0;
+str = { get toString() { upvar++; return function() { upvar++; return "12345"; } } };
+assertEq(parseInt(str, 10), 12345);
+assertEq(upvar, 2);
+
+
+/*
+ * 2. Let S be a newly created substring of inputString consisting of the first
+ *    character that is not a StrWhiteSpaceChar and all characters following
+ *    that character. (In other words, remove leading white space.)
+ */
+
+var ws =
+  ["\t", "\v", "\f", " ", "\xA0", "\uFEFF",
+     "\u2004", "\u3000", // a few Unicode whitespaces
+   "\r", "\n", "\u2028", "\u2029"];
+
+str = "8675309";
+for (var i = 0, sz = ws.length; i < sz; i++)
+{
+  assertEq(parseInt(ws[i] + str, 10), 8675309);
+  for (var j = 0, sz = ws.length; j < sz; j++)
+  {
+    assertEq(parseInt(ws[i] + ws[j] + str, 10), 8675309,
+             ws[i].charCodeAt(0).toString(16) + ", " +
+             ws[j].charCodeAt(0).toString(16));
+  }
+}
+
+
+/*
+ * 3. Let sign be 1.
+ * 4. If S is not empty and the first character of S is a minus sign -, let
+ *    sign be −1.
+ */
+str = "5552368";
+assertEq(parseInt("-" + str, 10), -parseInt(str, 10));
+assertEq(parseInt(" -" + str, 10), -parseInt(str, 10));
+assertEq(parseInt("-", 10), NaN);
+assertEq(parseInt("", 10), NaN);
+assertEq(parseInt("-0", 10), -0);
+
+
+/*
+ * 5. If S is not empty and the first character of S is a plus sign + or a
+ *    minus sign -, then remove the first character from S.
+ */
+assertEq(parseInt("+12345", 10), 12345);
+assertEq(parseInt(" +12345", 10), 12345);
+assertEq(parseInt("-12345", 10), -12345);
+assertEq(parseInt(" -12345", 10), -12345);
+
+
+/*
+ * 6.  Let R = ToInt32(radix).
+ */
+
+upvar = "";
+str =
+  { toString: function() { if (!upvar) upvar = "string"; return "42"; } };
+radix =
+  { toString: function() { if (!upvar) upvar = "radix"; return "10"; } };
+
+assertEq(parseInt(str, radix), 42);
+assertEq(upvar, "string");
+
+assertEq(parseInt("123", null), 123);
+assertEq(parseInt("123", undefined), 123);
+assertEq(parseInt("123", NaN), 123);
+assertEq(parseInt("123", -0), 123);
+assertEq(parseInt("10", 72057594037927950), 16);
+assertEq(parseInt("10", -4294967292), 4);
+assertEq(parseInt("0x10", 1e308), 16);
+assertEq(parseInt("10", 1e308), 10);
+assertEq(parseInt("10", { valueOf: function() { return 16; } }), 16);
+
+
+/*
+ * 7.  Let stripPrefix be true.
+ * 8.  If R ≠ 0, then
+ *     a. If R < 2 or R > 36, then return NaN.
+ *     b. If R ≠ 16, let stripPrefix be false.
+ * 9.  Else, R = 0
+ *     a. Let R = 10.
+ * 10. If stripPrefix is true, then
+ *     a. If the length of S is at least 2 and the first two characters of S
+ *     are either “0x” or “0X”, then remove the first two characters from S and
+ *     let R = 16.
+ */
+var vs = ["1", "51", "917", "2343", "99963"];
+for (var i = 0, sz = vs.length; i < sz; i++)
+  assertEq(parseInt(vs[i], 0), parseInt(vs[i], 10), "bad " + vs[i]);
+
+assertEq(parseInt("0x10"), 16);
+assertEq(parseInt("0x10", 0), 16);
+assertEq(parseInt("0x10", 16), 16);
+assertEq(parseInt("0x10", 8), 0);
+assertEq(parseInt("-0x10", 16), -16);
+
+assertEq(parseInt("5", 1), NaN);
+assertEq(parseInt("5", 37), NaN);
+assertEq(parseInt("5", { valueOf: function() { return -1; } }), NaN);
+
+
+/*
+ * 11. If S contains any character that is not a radix-R digit, then let Z be
+ *     the substring of S consisting of all characters before the first such
+ *     character; otherwise, let Z be S.
+ * 12. If Z is empty, return NaN.
+ */
+assertEq(parseInt(""), NaN);
+assertEq(parseInt("ohai"), NaN);
+assertEq(parseInt("0xohai"), NaN);
+assertEq(parseInt("-ohai"), NaN);
+assertEq(parseInt("+ohai"), NaN);
+assertEq(parseInt(" ohai"), NaN);
+
+assertEq(parseInt("0xaohai"), 10);
+assertEq(parseInt("hohai", 18), 17);
+
+
+/*
+ * 13. Let mathInt be the mathematical integer value that is represented by Z
+ *     in radix-R notation, using the letters A-Z and a-z for digits with
+ *     values 10 through 35. (However, if R is 10 and Z contains more than 20
+ *     significant digits, every significant digit after the 20th may be
+ *     replaced by a 0 digit, at the option of the implementation; and if R is
+ *     not 2, 4, 8, 10, 16, or 32, then mathInt may be an implementation-
+ *     dependent approximation to the mathematical integer value that is
+ *     represented by Z in radix-R notation.)
+ * 14. Let number be the Number value for mathInt.
+ * 15. Return sign × number.
+ */
+assertEq(parseInt("ohai", 36), 1142154);
+assertEq(parseInt("0ohai", 36), 1142154);
+assertEq(parseInt("00ohai", 36), 1142154);
+assertEq(parseInt("A", 16), 10);
+assertEq(parseInt("0A", 16), 10);
+assertEq(parseInt("00A", 16), 10);
+assertEq(parseInt("A", 17), 10);
+assertEq(parseInt("0A", 17), 10);
+assertEq(parseInt("00A", 17), 10);
+
+
+/******************************************************************************/
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);
+
+print("All tests passed!");