1 files changed, 14 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Math/acos/S15.8.2.2_A3.js b/js/src/tests/test262/built-ins/Math/acos/S15.8.2.2_A3.js
new file mode 100644
index 0000000000..ec097dab8a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Math/acos/S15.8.2.2_A3.js
@@ -0,0 +1,14 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: If x is less than -1, Math.acos(x) is NaN
+es5id: 15.8.2.2_A3
+description: Checking if Math.acos(x) is NaN, where x is less than -1
+---*/
+
+assert.sameValue(Math.acos(-1.000000000000001), NaN, "-1.000000000000001");
+assert.sameValue(Math.acos(-2), NaN, "-2");
+assert.sameValue(Math.acos(-Infinity), NaN, "-Infinity");
+
+reportCompare(0, 0);