The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/js/src/tests/ecma_5/extensions/watch-inherited-property.js	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,38 @@
     1.4 +/*
     1.5 + * Any copyright is dedicated to the Public Domain.
     1.6 + * http://creativecommons.org/licenses/publicdomain/
     1.7 + */
     1.8 +
     1.9 +/* Create a prototype object with a setter property. */
    1.10 +var protoSetterCount;
    1.11 +var proto = ({ set x(v) { protoSetterCount++; } });
    1.12 +
    1.13 +/* Put a watchpoint on that setter. */
    1.14 +var protoWatchCount;
    1.15 +proto.watch('x', function() { protoWatchCount++; });
    1.16 +
    1.17 +/* Make an object with the above as its prototype. */
    1.18 +function C() { }
    1.19 +C.prototype = proto;
    1.20 +var o = new C();
    1.21 +
    1.22 +/*
    1.23 + * Set a watchpoint on the property in the inheriting object. We have
    1.24 + * defined this to mean "duplicate the property, setter and all, in the
    1.25 + * inheriting object." I don't think debugging observation mechanisms
    1.26 + * should mutate the program being run, but that's what we've got.
    1.27 + */
    1.28 +var oWatchCount;
    1.29 +o.watch('x', function() { oWatchCount++; });
    1.30 +
    1.31 +/*
    1.32 + * Assign to the property. This should trip the watchpoint on the inheriting object and
    1.33 + * the setter.
    1.34 + */
    1.35 +protoSetterCount = protoWatchCount = oWatchCount = 0;
    1.36 +o.x = 1;
    1.37 +assertEq(protoWatchCount, 0);
    1.38 +assertEq(oWatchCount, 1);
    1.39 +assertEq(protoSetterCount, 1);
    1.40 +
    1.41 +reportCompare(true, true);