The Tor Browser / file comparison
comparison: js/src/tests/ecma_5/extensions/watch-value-prop-becoming-setter.js
js/src/tests/ecma_5/extensions/watch-value-prop-becoming-setter.js
- changeset 0
- 6474c204b198
equal
deleted
inserted
replaced
| -1:000000000000 | 0:a68d11796ac4 |
|---|---|
| 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, old, newval) { | |
| 9 watcherCount++; | |
| 10 return newval; | |
| 11 } | |
| 12 | |
| 13 /* Create an object with a value property. */ | |
| 14 var o = { w:2, x:3 }; | |
| 15 | |
| 16 /* | |
| 17 * Place a watchpoint on the value property. The watchpoint structure holds | |
| 18 * the original JavaScript setter, and a pointer to the shape. | |
| 19 */ | |
| 20 o.watch('x', watcher); | |
| 21 | |
| 22 /* | |
| 23 * Put the object in dictionary mode, so that JSObject::putProperty will | |
| 24 * mutate its shapes instead of creating new ones. | |
| 25 */ | |
| 26 delete o.w; | |
| 27 | |
| 28 /* | |
| 29 * Replace the value property with a setter. | |
| 30 */ | |
| 31 var setterCount; | |
| 32 o.__defineSetter__('x', function() { setterCount++; }); | |
| 33 | |
| 34 /* | |
| 35 * Trigger the watchpoint. The watchpoint handler should run, and then the | |
| 36 * setter should run. | |
| 37 */ | |
| 38 watcherCount = setterCount = 0; | |
| 39 o.x = 4; | |
| 40 assertEq(watcherCount, 1); | |
| 41 assertEq(setterCount, 1); | |
| 42 | |
| 43 reportCompare(true, true); |
