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comparison: js/src/tests/ecma_5/extensions/watch-replaced-setter.js
js/src/tests/ecma_5/extensions/watch-replaced-setter.js
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| -1:000000000000 | 0:ccb1b9a037b9 |
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| 1 /* | |
| 2 * Any copyright is dedicated to the Public Domain. | |
| 3 * http://creativecommons.org/licenses/publicdomain/ | |
| 4 */ | |
| 5 | |
| 6 /* A stock watcher function. */ | |
| 7 var watcherCount; | |
| 8 function watcher(id, oldval, newval) { watcherCount++; return newval; } | |
| 9 | |
| 10 /* Create an object with a JavaScript setter. */ | |
| 11 var setterCount; | |
| 12 var o = { w:2, set x(v) { setterCount++; } }; | |
| 13 | |
| 14 /* | |
| 15 * Put the object in dictionary mode, so that JSObject::putProperty will | |
| 16 * mutate its shapes instead of creating new ones. | |
| 17 */ | |
| 18 delete o.w; | |
| 19 | |
| 20 /* | |
| 21 * Place a watchpoint on the property. The watchpoint structure holds the | |
| 22 * original JavaScript setter, and a pointer to the shape. | |
| 23 */ | |
| 24 o.watch('x', watcher); | |
| 25 | |
| 26 /* | |
| 27 * Replace the accessor property with a value property. The shape's setter | |
| 28 * should become a non-JS setter, js_watch_set, and the watchpoint | |
| 29 * structure's saved setter should be updated (in this case, cleared). | |
| 30 */ | |
| 31 Object.defineProperty(o, 'x', { value:3, | |
| 32 writable:true, | |
| 33 enumerable:true, | |
| 34 configurable:true }); | |
| 35 | |
| 36 /* | |
| 37 * Assign to the property. This should trigger js_watch_set, which should | |
| 38 * call the handler, and then see that there is no JS-level setter to pass | |
| 39 * control on to, and return. | |
| 40 */ | |
| 41 watcherCount = setterCount = 0; | |
| 42 o.x = 3; | |
| 43 assertEq(watcherCount, 1); | |
| 44 assertEq(setterCount, 0); | |
| 45 | |
| 46 reportCompare(true, true); |
