1 files changed, 29 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/isNaN/tonumber-operations.js b/js/src/tests/test262/built-ins/isNaN/tonumber-operations.js
new file mode 100644
index 0000000000..f2eb404fbe
--- /dev/null
+++ b/js/src/tests/test262/built-ins/isNaN/tonumber-operations.js
@@ -0,0 +1,29 @@
+// Copyright (C) 2016 The V8 Project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-isnan-number
+description: >
+  number argument is converted by ToNumber
+info: |
+  isNaN (number)
+
+  1. Let num be ? ToNumber(number).
+  2. If num is NaN, return true.
+  3. Otherwise, return false.
+---*/
+
+assert.sameValue(isNaN("0"), false, "'0'");
+assert.sameValue(isNaN(""), false, "the empty string");
+assert.sameValue(isNaN("Infinity"), false, "'Infinity'");
+assert.sameValue(isNaN("this is not a number"), true, "string");
+assert.sameValue(isNaN(true), false, "true");
+assert.sameValue(isNaN(false), false, "false");
+assert.sameValue(isNaN([1]), false, "Object [1]");
+assert.sameValue(isNaN([Infinity]), false, "Object [Infinity]");
+assert.sameValue(isNaN([NaN]), true, "Object [NaN]");
+assert.sameValue(isNaN(null), false, "null");
+assert.sameValue(isNaN(undefined), true, "undefined");
+assert.sameValue(isNaN(), true, "no arg");
+
+reportCompare(0, 0);