js/src/jit-test/tests/basic/testWatchRecursion.js@6474c204b198 (annotated)
js/src/jit-test/tests/basic/testWatchRecursion.js
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | // Test that the watch handler is not called recursively for the same object |
| michael@0 | 2 | // and property. |
| michael@0 | 3 | (function() { |
| michael@0 | 4 | var obj1 = {}, obj2 = {}; |
| michael@0 | 5 | var handler_entry_count = 0; |
| michael@0 | 6 | var handler_exit_count = 0; |
| michael@0 | 7 | |
| michael@0 | 8 | obj1.watch('x', handler); |
| michael@0 | 9 | obj1.watch('y', handler); |
| michael@0 | 10 | obj2.watch('x', handler); |
| michael@0 | 11 | obj1.x = 1; |
| michael@0 | 12 | assertEq(handler_entry_count, 3); |
| michael@0 | 13 | assertEq(handler_exit_count, 3); |
| michael@0 | 14 | |
| michael@0 | 15 | function handler(id) { |
| michael@0 | 16 | handler_entry_count++; |
| michael@0 | 17 | assertEq(handler_exit_count, 0); |
| michael@0 | 18 | switch (true) { |
| michael@0 | 19 | case this === obj1 && id === "x": |
| michael@0 | 20 | assertEq(handler_entry_count, 1); |
| michael@0 | 21 | obj2.x = 3; |
| michael@0 | 22 | assertEq(handler_exit_count, 2); |
| michael@0 | 23 | break; |
| michael@0 | 24 | case this === obj2 && id === "x": |
| michael@0 | 25 | assertEq(handler_entry_count, 2); |
| michael@0 | 26 | obj1.y = 4; |
| michael@0 | 27 | assertEq(handler_exit_count, 1); |
| michael@0 | 28 | break; |
| michael@0 | 29 | default: |
| michael@0 | 30 | assertEq(this, obj1); |
| michael@0 | 31 | assertEq(id, "y"); |
| michael@0 | 32 | assertEq(handler_entry_count, 3); |
| michael@0 | 33 | |
| michael@0 | 34 | // We expect no more watch handler invocations |
| michael@0 | 35 | obj1.x = 5; |
| michael@0 | 36 | obj1.y = 6; |
| michael@0 | 37 | obj2.x = 7; |
| michael@0 | 38 | assertEq(handler_exit_count, 0); |
| michael@0 | 39 | break; |
| michael@0 | 40 | } |
| michael@0 | 41 | ++handler_exit_count; |
| michael@0 | 42 | assertEq(handler_entry_count, 3); |
| michael@0 | 43 | } |
| michael@0 | 44 | })(); |
| michael@0 | 45 | |
| michael@0 | 46 | |
| michael@0 | 47 | // Test that run-away recursion in watch handlers is properly handled. |
| michael@0 | 48 | (function() { |
| michael@0 | 49 | var obj = {}; |
| michael@0 | 50 | var i = 0; |
| michael@0 | 51 | try { |
| michael@0 | 52 | handler(); |
| michael@0 | 53 | throw new Error("Unreachable"); |
| michael@0 | 54 | } catch(e) { |
| michael@0 | 55 | assertEq(e instanceof InternalError, true); |
| michael@0 | 56 | } |
| michael@0 | 57 | |
| michael@0 | 58 | function handler() { |
| michael@0 | 59 | var prop = "a" + ++i; |
| michael@0 | 60 | obj.watch(prop, handler); |
| michael@0 | 61 | obj[prop] = 2; |
| michael@0 | 62 | } |
| michael@0 | 63 | })(); |
