1 files changed, 20 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Math/acosh/nan-returns.js b/js/src/tests/test262/built-ins/Math/acosh/nan-returns.js
new file mode 100644
index 0000000000..17a96a2adb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Math/acosh/nan-returns.js
@@ -0,0 +1,20 @@
+// Copyright 2015 Microsoft Corporation. All rights reserved.
+// This code is governed by the license found in the LICENSE file.
+
+/*---
+description: Math.acosh with special values
+es6id: 20.2.2.3
+info: |
+  Math.acosh ( x )
+
+  - If x is NaN, the result is NaN.
+  - If x is less than 1, the result is NaN.
+---*/
+
+assert.sameValue(Math.acosh(NaN), NaN, "NaN");
+assert.sameValue(Math.acosh(0.999999), NaN, "0.999999");
+assert.sameValue(Math.acosh(0), NaN, "0");
+assert.sameValue(Math.acosh(-1), NaN, "-1");
+assert.sameValue(Math.acosh(-Infinity), NaN, "-Infinity");
+
+reportCompare(0, 0);