1 files changed, 59 insertions, 0 deletions
diff --git a/js/src/tests/ecma_5/misc/global-numeric-properties.js b/js/src/tests/ecma_5/misc/global-numeric-properties.js
new file mode 100644
index 000000000..352c0d3b7
--- /dev/null
+++ b/js/src/tests/ecma_5/misc/global-numeric-properties.js
@@ -0,0 +1,59 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ */
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 537863;
+var summary =
+  'undefined, Infinity, and NaN global properties should not be writable';
+
+print(BUGNUMBER + ": " + summary);
+
+/**************
+ * BEGIN TEST *
+ **************/
+
+var desc, old, error;
+var global = this;
+
+var names = ["NaN", "Infinity", "undefined"];
+
+for (var i = 0; i < names.length; i++)
+{
+  var name = names[i];
+  desc = Object.getOwnPropertyDescriptor(global, name);
+  assertEq(desc !== undefined, true, name + " should be present");
+  assertEq(desc.enumerable, false, name + " should not be enumerable");
+  assertEq(desc.configurable, false, name + " should not be configurable");
+  assertEq(desc.writable, false, name + " should not be writable");
+
+  old = global[name];
+  global[name] = 17;
+  assertEq(global[name], old, name + " changed on setting?");
+
+  error = "before";
+  try
+  {
+    throw new TypeError("SpiderMonkey doesn't currently implement " +
+                        "strict-mode throwing when setting a readonly " +
+                        "property, not running this bit of test for now; " +
+                        "see bug 537873");
+
+    (function() { "use strict"; global[name] = 42; error = "didn't throw"; })();
+  }
+  catch (e)
+  {
+    if (e instanceof TypeError)
+      error = "typeerror";
+    else
+      error = "bad exception: " + e;
+  }
+  assertEq(error, "typeerror", "wrong strict mode error setting " + name);
+}
+
+/******************************************************************************/
+
+reportCompare(true, true);
+
+print("All tests passed!");