1 files changed, 28 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/property-cast-nan-infinity.js b/js/src/tests/test262/built-ins/Array/property-cast-nan-infinity.js
new file mode 100644
index 0000000000..5c361f0789
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/property-cast-nan-infinity.js
@@ -0,0 +1,28 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    A property name P (in the form of a string value) is an array index
+    if and only if ToString(ToUint32(P)) is equal to P and ToUint32(P) is not equal to 2^32 - 1
+es5id: 15.4_A1.1_T2
+description: Checking for number primitive
+---*/
+
+var x = [];
+
+x[NaN] = 1;
+assert.sameValue(x[0], undefined, "x[NaN] does not cast to x[0]");
+assert.sameValue(x["NaN"], 1, "x[NaN] casts to x['NaN']");
+
+var y = [];
+y[Number.POSITIVE_INFINITY] = 1;
+assert.sameValue(y[0], undefined, "y[Number.POSITIVE_INFINITY] !== y[0]");
+assert.sameValue(y["Infinity"], 1, "y[Number.POSITIVE_INFINITY] === y['Infinity']");
+
+var z = [];
+z[Number.NEGATIVE_INFINITY] = 1;
+assert.sameValue(z[0], undefined, "z[Number.NEGATIVE_INFINITY] !== z[0]");
+assert.sameValue(z["-Infinity"], 1, "z[Number.NEGATIVE_INFINITY] === z['-Infinity']");
+
+reportCompare(0, 0);