js/src/jit-test/tests/debug/Environment-setVariable-12.js@ac0c01689b40 (annotated)
js/src/jit-test/tests/debug/Environment-setVariable-12.js
Thu, 15 Jan 2015 15:59:08 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 15 Jan 2015 15:59:08 +0100
- branch
- TOR_BUG_9701
- changeset 10
- ac0c01689b40
- permissions
- -rw-r--r--
Implement a real Private Browsing Mode condition by changing the API/ABI;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
| michael@0 | 1 | // setVariable can create a new property on a with block's bindings object, if |
| michael@0 | 2 | // it is shadowing an existing property on the prototype chain. |
| michael@0 | 3 | |
| michael@0 | 4 | var g = newGlobal(); |
| michael@0 | 5 | var dbg = Debugger(g); |
| michael@0 | 6 | dbg.onDebuggerStatement = function (frame) { |
| michael@0 | 7 | var env = frame.environment.find("x"); |
| michael@0 | 8 | env.setVariable("x", 2); |
| michael@0 | 9 | }; |
| michael@0 | 10 | g.eval("var obj1 = {x: 1}, obj2 = Object.create(obj1), z; with (obj2) { debugger; z = x; }"); |
| michael@0 | 11 | assertEq(g.obj1.x, 1); |
| michael@0 | 12 | assertEq(g.obj2.x, 2); |
| michael@0 | 13 | assertEq(g.z, 2); |
| michael@0 | 14 | |
| michael@0 | 15 | // The property created by setVariable is like the one created by ordinary |
| michael@0 | 16 | // assignment in a with-block. |
| michael@0 | 17 | var desc = Object.getOwnPropertyDescriptor(g.obj2, "x"); |
| michael@0 | 18 | assertEq(desc.configurable, true); |
| michael@0 | 19 | assertEq(desc.enumerable, true); |
| michael@0 | 20 | assertEq(desc.writable, true); |
| michael@0 | 21 | assertEq(desc.value, 2); |
