1 files changed, 55 insertions, 0 deletions
diff --git a/js/src/tests/non262/TypedArray/prototype-constructor-identity.js b/js/src/tests/non262/TypedArray/prototype-constructor-identity.js
new file mode 100644
index 0000000000..10324f5720
--- /dev/null
+++ b/js/src/tests/non262/TypedArray/prototype-constructor-identity.js
@@ -0,0 +1,55 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+var gTestfile = 'prototype-constructor-identity.js';
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 896116;
+var summary =
+  "Typed array prototypes/constructors should be largely empty, inheriting "
+  "most functionality from %TypedArray% and %TypedArray%.prototype";
+
+print(BUGNUMBER + ": " + summary);
+
+/**************
+ * BEGIN TEST *
+ **************/
+
+var TypedArray = Object.getPrototypeOf(Int8Array);
+
+assertEq(TypedArray !== Function.prototype, true,
+         "%TypedArray% should be in constructors' [[Prototype]] chains");
+assertEq(Object.getPrototypeOf(TypedArray), Function.prototype,
+         "%TypedArray%.prototype should inherit from Function.prototype");
+
+assertEq(TypedArray.prototype.constructor, TypedArray,
+         "bad %TypedArray%.prototype.constructor");
+
+// Check a few different functions we implement are here, as a sanity check.
+var typedArrayProps = Object.getOwnPropertyNames(TypedArray.prototype);
+assertEq(typedArrayProps.indexOf("copyWithin") >= 0, true);
+assertEq(typedArrayProps.indexOf("subarray") >= 0, true);
+assertEq(typedArrayProps.indexOf("set") >= 0, true);
+
+anyTypedArrayConstructors.forEach(function(ctor) {
+  assertEq(Object.getPrototypeOf(ctor), TypedArray);
+
+  var proto = ctor.prototype;
+
+  // Inherited functions aren't present.
+  var props = Object.getOwnPropertyNames(proto).sort();
+  assertEq(props[0], "BYTES_PER_ELEMENT");
+  assertEq(props[1], "constructor");
+  assertEq(props.length, 2);
+
+  // The inheritance chain should be set up properly.
+  assertEq(Object.getPrototypeOf(proto), TypedArray.prototype,
+           "prototype should inherit from %TypedArray%.prototype");
+});
+
+/******************************************************************************/
+
+reportCompare(true, true);
+
+print("Tests complete");