1 files changed, 104 insertions, 0 deletions
diff --git a/js/src/tests/non262/extensions/clone-typed-array.js b/js/src/tests/non262/extensions/clone-typed-array.js
new file mode 100644
index 0000000000..77f0376e91
--- /dev/null
+++ b/js/src/tests/non262/extensions/clone-typed-array.js
@@ -0,0 +1,104 @@
+// |reftest| skip-if(!xulRuntime.shell)
+// Any copyright is dedicated to the Public Domain.
+// http://creativecommons.org/licenses/publicdomain/
+
+function assertArraysEqual(a, b) {
+    assertEq(a.constructor, b.constructor);
+    assertEq(a.length, b.length);
+    for (var i = 0; i < a.length; i++)
+        assertEq(a[i], b[i]);
+}
+
+function check(b) {
+    var a = deserialize(serialize(b));
+    assertArraysEqual(a, b);
+}
+
+function checkPrototype(ctor) {
+    var threw = false;
+    try {
+	serialize(ctor.prototype);
+	throw new Error("serializing " + ctor.name + ".prototype should throw a TypeError");
+    } catch (exc) {
+	if (!(exc instanceof TypeError))
+	    throw exc;
+    }
+}
+
+function test() {
+    // Test cloning ArrayBuffer objects.
+    check(new ArrayBuffer(0));
+    check(new ArrayBuffer(7));
+    checkPrototype(ArrayBuffer);
+
+    // Test cloning typed array objects.
+    var ctors = [
+        Int8Array,
+        Uint8Array,
+        Int16Array,
+        Uint16Array,
+        Int32Array,
+        Uint32Array,
+        Float32Array,
+        Float64Array,
+        Uint8ClampedArray];
+
+    var b;
+    for (var i = 0; i < ctors.length; i++) {
+        var ctor = ctors[i];
+
+        // check empty array
+        b = new ctor(0);
+        check(b);
+
+        // check array with some elements
+        b = new ctor(100);
+        var v = 1;
+        for (var j = 0; j < 100; j++) {
+            b[j] = v;
+            v *= 7;
+        }
+        b[99] = NaN; // check serializing NaNs too
+        check(b);
+
+	// try the prototype
+	checkPrototype(ctor);
+    }
+
+    // Two TypedArrays backed by the same ArrayBuffer should be cloned into two
+    // TypedArrays still sharing a buffer. This also tests cloning TypedArrays
+    // where the arr->data pointer is not 8-byte-aligned.
+
+    var base = new Int8Array([0, 1, 2, 3]);
+    b = [new Int8Array(base.buffer, 0, 3), new Int8Array(base.buffer, 1, 3)];
+    var a = deserialize(serialize(b));
+    base[1] = -1;
+    a[0][2] = -2;
+    assertArraysEqual(b[0], new Int8Array([0, -1, 2])); // shared with base
+    assertArraysEqual(b[1], new Int8Array([-1, 2, 3])); // shared with base
+    assertArraysEqual(a[0], new Int8Array([0, 1, -2])); // not shared with base
+    assertArraysEqual(a[1], new Int8Array([1, -2, 3])); // not shared with base, shared with a[0]
+
+    assertEq(b[0].buffer, b[1].buffer);
+    assertEq(b[1].byteOffset, 1);
+    assertEq(b[1].byteLength, 3);
+    assertEq(b[1].buffer.byteLength, 4);
+
+    // ArrayBuffer clones do not preserve properties
+
+    base = new Int8Array([0, 1, 2, 3]);
+    b = [new Int8Array(base.buffer, 0, 3), new Int8Array(base.buffer, 1, 3)];
+    base.buffer.prop = "yes";
+    base.buffer.loop = b[0];
+    base.buffer.loops = [ b[0], b[1] ];
+    a = deserialize(serialize(b));
+    assertEq("prop" in a[0].buffer, false);
+    assertEq("prop" in a[1].buffer, false);
+    assertEq("loop" in a[0].buffer, false);
+    assertEq("loop" in a[1].buffer, false);
+    assertEq("loops" in a[0].buffer, false);
+    assertEq("loops" in a[1].buffer, false);
+}
+
+test();
+reportCompare(0, 0, 'ok');