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comparison: js/src/tests/ecma_5/extensions/watch-setter-become-setter.js
js/src/tests/ecma_5/extensions/watch-setter-become-setter.js
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| -1:000000000000 | 0:1143e4a0d89d |
|---|---|
| 1 /* | |
| 2 * Any copyright is dedicated to the Public Domain. | |
| 3 * http://creativecommons.org/licenses/publicdomain/ | |
| 4 */ | |
| 5 | |
| 6 /* Create an object with a JavaScript setter. */ | |
| 7 var firstSetterCount; | |
| 8 var o = { w:2, set x(v) { firstSetterCount++; } }; | |
| 9 | |
| 10 /* | |
| 11 * Put the object in dictionary mode, so that JSObject::putProperty will | |
| 12 * mutate its shapes instead of creating new ones. | |
| 13 */ | |
| 14 delete o.w; | |
| 15 | |
| 16 /* A stock watcher function. */ | |
| 17 var watcherCount; | |
| 18 function watcher(id, oldval, newval) { watcherCount++; return newval; } | |
| 19 | |
| 20 /* | |
| 21 * Place a watchpoint on the property. The property's shape now has the | |
| 22 * watchpoint setter, with the original setter saved in the watchpoint | |
| 23 * structure. | |
| 24 */ | |
| 25 o.watch('x', watcher); | |
| 26 | |
| 27 /* | |
| 28 * Replace the setter with a new setter. The shape should get updated to | |
| 29 * refer to the new setter, and then the watchpoint setter should be | |
| 30 * re-established. | |
| 31 */ | |
| 32 var secondSetterCount; | |
| 33 Object.defineProperty(o, 'x', { set: function () { secondSetterCount++ } }); | |
| 34 | |
| 35 /* | |
| 36 * Assign to the property. This should trigger the watchpoint and the new setter. | |
| 37 */ | |
| 38 watcherCount = firstSetterCount = secondSetterCount = 0; | |
| 39 o.x = 3; | |
| 40 assertEq(watcherCount, 1); | |
| 41 assertEq(firstSetterCount, 0); | |
| 42 assertEq(secondSetterCount, 1); | |
| 43 | |
| 44 reportCompare(true, true); |
