1 files changed, 49 insertions, 0 deletions
diff --git a/js/src/tests/non262/TypedArray/seal-and-freeze.js b/js/src/tests/non262/TypedArray/seal-and-freeze.js
new file mode 100644
index 0000000000..f90efb866f
--- /dev/null
+++ b/js/src/tests/non262/TypedArray/seal-and-freeze.js
@@ -0,0 +1,49 @@
+"use strict";
+
+// Seal
+assertEq(Object.isSealed(new Int32Array(2)), false);
+assertEq(Object.isSealed(new Int32Array(0)), false);
+
+var array = new Int32Array(0);
+Object.preventExtensions(array);
+assertEq(Object.isSealed(array), true);
+
+// Non-empty typed arrays can never be sealed, because the elements stay configurable.
+array = new Int32Array(1);
+array.b = "test";
+Object.preventExtensions(array);
+assertEq(Object.isSealed(array), false);
+Object.defineProperty(array, "b", {configurable: false});
+assertEq(Object.isSealed(array), false);
+
+array = new Int32Array(2);
+array.b = "test";
+assertThrowsInstanceOf(() => Object.seal(array), TypeError);
+assertEq(Object.isSealed(array), false);
+assertThrowsInstanceOf(() => array.c = 15, TypeError);
+
+// Freeze
+assertEq(Object.isFrozen(new Int32Array(2)), false);
+assertEq(Object.isFrozen(new Int32Array(0)), false);
+
+// Empty non-extensible typed-array is trivially frozen
+var array = new Int32Array(0);
+Object.preventExtensions(array);
+assertEq(Object.isFrozen(array), true);
+
+array = new Int32Array(0);
+array.b = "test";
+assertEq(Object.isFrozen(array), false);
+Object.preventExtensions(array);
+assertEq(Object.isFrozen(array), false);
+Object.defineProperty(array, "b", {configurable: false, writable: false});
+assertEq(Object.isFrozen(array), true);
+
+// Non-empty typed arrays can never be frozen, because the elements stay writable
+array = new Int32Array(1);
+assertThrowsInstanceOf(() => Object.freeze(array), TypeError);
+assertEq(Object.isExtensible(array), false);
+assertEq(Object.isFrozen(array), false);
+
+if (typeof reportCompare === "function")
+    reportCompare(true, true);