1 files changed, 30 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/String/S9.8.1_A4.js b/js/src/tests/test262/built-ins/String/S9.8.1_A4.js
new file mode 100644
index 0000000000..4aeeed1112
--- /dev/null
+++ b/js/src/tests/test262/built-ins/String/S9.8.1_A4.js
@@ -0,0 +1,30 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: If m is infinity, return the string "Infinity"
+es5id: 9.8.1_A4
+description: +/-Infinity convert to String by explicit transformation
+---*/
+
+// CHECK#1
+if (String(Infinity) !== "Infinity") {
+  throw new Test262Error('#1: String(Infinity) === "Infinity". Actual: ' + (String(Infinity)));
+}
+
+// CHECK#2
+if (String(Number.POSITIVE_INFINITY) !== "Infinity") {
+  throw new Test262Error('#2: String(Number.POSITIVE_INFINITY) === "Infinity". Actual: ' + (String(Number.POSITIVE_INFINITY)));
+}
+
+// CHECK#3
+if (String(-Infinity) !== "-Infinity") {
+  throw new Test262Error('#3: String(-Infinity) === "-Infinity". Actual: ' + (String(-Infinity)));
+}
+
+// CHECK#4
+if (String(Number.NEGATIVE_INFINITY) !== "-Infinity") {
+  throw new Test262Error('#4: String(Number.NEGATIVE_INFINITY) === "-Infinity". Actual: ' + (String(Number.NEGATIVE_INFINITY)));
+}
+
+reportCompare(0, 0);