1 files changed, 29 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/isNaN/return-false-not-nan-numbers.js b/js/src/tests/test262/built-ins/isNaN/return-false-not-nan-numbers.js
new file mode 100644
index 0000000000..0c8edee16f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/isNaN/return-false-not-nan-numbers.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: >
+  Return false if number is not NaN
+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(-0), false, "-0");
+assert.sameValue(isNaN(Math.pow(2, 53)), false, "Math.pow(2, 53)");
+assert.sameValue(isNaN(-Math.pow(2, 53)), false, "-Math.pow(2, 53)");
+assert.sameValue(isNaN(1), false, "1");
+assert.sameValue(isNaN(-1), false, "-1");
+assert.sameValue(isNaN(0.000001), false, "0.000001");
+assert.sameValue(isNaN(-0.000001), false, "-0.000001");
+assert.sameValue(isNaN(1e42), false, "1e42");
+assert.sameValue(isNaN(-1e42), false, "-1e42");
+assert.sameValue(isNaN(Infinity), false, "Infinity");
+assert.sameValue(isNaN(-Infinity), false, "-Infinity");
+
+reportCompare(0, 0);