The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/js/src/tests/js1_8_5/extensions/clone-transferables.js	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,87 @@
     1.4 +// |reftest| skip-if(!xulRuntime.shell)
     1.5 +// Any copyright is dedicated to the Public Domain.
     1.6 +// http://creativecommons.org/licenses/publicdomain/
     1.7 +
     1.8 +function test() {
     1.9 +    // Note: -8 and -200 will trigger asm.js link failures because 8 and 200
    1.10 +    // bytes are below the minimum allowed size, and the buffer will not
    1.11 +    // actually be converted to an asm.js buffer.
    1.12 +    for (var size of [0, 8, 16, 200, 1000, 4096, -8, -200, -8192, -65536]) {
    1.13 +        var buffer_ctor = (size < 0) ? AsmJSArrayBuffer : ArrayBuffer;
    1.14 +        size = Math.abs(size);
    1.15 +
    1.16 +        var old = new buffer_ctor(size);
    1.17 +        var copy = deserialize(serialize(old, [old]));
    1.18 +        assertEq(old.byteLength, 0);
    1.19 +        assertEq(copy.byteLength, size);
    1.20 +
    1.21 +        var constructors = [ Int8Array,
    1.22 +                             Uint8Array,
    1.23 +                             Int16Array,
    1.24 +                             Uint16Array,
    1.25 +                             Int32Array,
    1.26 +                             Uint32Array,
    1.27 +                             Float32Array,
    1.28 +                             Float64Array,
    1.29 +                             Uint8ClampedArray ];
    1.30 +
    1.31 +        for (var ctor of constructors) {
    1.32 +            var buf = new buffer_ctor(size);
    1.33 +            var old_arr = new ctor(buf);
    1.34 +            assertEq(buf.byteLength, size);
    1.35 +            assertEq(buf, old_arr.buffer);
    1.36 +            assertEq(old_arr.length, size / old_arr.BYTES_PER_ELEMENT);
    1.37 +
    1.38 +            var copy_arr = deserialize(serialize(old_arr, [ buf ]));
    1.39 +            assertEq(buf.byteLength, 0, "donor array buffer should be neutered");
    1.40 +            assertEq(old_arr.length, 0, "donor typed array should be neutered");
    1.41 +            assertEq(copy_arr.buffer.byteLength == size, true);
    1.42 +            assertEq(copy_arr.length, size / old_arr.BYTES_PER_ELEMENT);
    1.43 +
    1.44 +            buf = null;
    1.45 +            old_arr = null;
    1.46 +            gc(); // Tickle the ArrayBuffer -> view management
    1.47 +        }
    1.48 +
    1.49 +        for (var ctor of constructors) {
    1.50 +            var buf = new buffer_ctor(size);
    1.51 +            var old_arr = new ctor(buf);
    1.52 +            var dv = new DataView(buf); // Second view
    1.53 +            var copy_arr = deserialize(serialize(old_arr, [ buf ]));
    1.54 +            assertEq(buf.byteLength, 0, "donor array buffer should be neutered");
    1.55 +            assertEq(old_arr.length, 0, "donor typed array should be neutered");
    1.56 +            assertEq(dv.byteLength, 0, "all views of donor array buffer should be neutered");
    1.57 +
    1.58 +            buf = null;
    1.59 +            old_arr = null;
    1.60 +            gc(); // Tickle the ArrayBuffer -> view management
    1.61 +        }
    1.62 +
    1.63 +        // Mutate the buffer during the clone operation. The modifications should be visible.
    1.64 +        if (size >= 4) {
    1.65 +            old = new buffer_ctor(size);
    1.66 +            var view = new Int32Array(old);
    1.67 +            view[0] = 1;
    1.68 +            var mutator = { get foo() { view[0] = 2; } };
    1.69 +            var copy = deserialize(serialize([ old, mutator ], [old]));
    1.70 +            var viewCopy = new Int32Array(copy[0]);
    1.71 +            assertEq(view.length, 0); // Neutered
    1.72 +            assertEq(viewCopy[0], 2);
    1.73 +        }
    1.74 +
    1.75 +        // Neuter the buffer during the clone operation. Should throw an exception.
    1.76 +        if (size >= 4) {
    1.77 +            old = new buffer_ctor(size);
    1.78 +            var mutator = {
    1.79 +                get foo() {
    1.80 +                    deserialize(serialize(old, [old]));
    1.81 +                }
    1.82 +            };
    1.83 +            // The throw is not yet implemented, bug 919259.
    1.84 +            //var copy = deserialize(serialize([ old, mutator ], [old]));
    1.85 +        }
    1.86 +    }
    1.87 +}
    1.88 +
    1.89 +test();
    1.90 +reportCompare(0, 0, 'ok');