tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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args-attributes.js (2817B)

      1 function strictArgs() {
      2    return (function (a, b, c) {'use strict'; return arguments; })(1, 2);
      3 }
      4 
      5 function normalArgs() {
      6    return (function (a, b, c) { return arguments; })(1, 2);
      7 }
      8 
      9 function checkProperty(options, prop, shouldThrow) {
     10    var desc, orig;
     11    var obj = options.strict ? strictArgs() : normalArgs();
     12    var objType = options.strict ? "strict arguments." : "normal arguments.";
     13 
     14    function check() {
     15        orig = Object.getOwnPropertyDescriptor(obj, prop);
     16 
     17        var threw = false;
     18        try {
     19            obj[prop] = obj[prop];
     20        }
     21        catch (e) {
     22            threw = true;
     23        }
     24        assertEq(threw, shouldThrow, objType + prop + " threw");
     25 
     26        if (orig === undefined) {
     27            // The property wasn't defined, so we can skip it.
     28            return;
     29        }
     30 
     31        desc = Object.getOwnPropertyDescriptor(obj, prop);
     32        if ("value" in orig) {
     33            assertEq(desc.value, orig.value, objType + prop + " value");
     34        } else {
     35            assertEq(desc.get, orig.get, objType + prop + " get");
     36            assertEq(desc.set, orig.set, objType + prop + " set");
     37        }
     38        assertEq(desc.writable, orig.writable, objType + prop + " writable");
     39        assertEq(desc.enumerable, orig.enumerable, objType + prop + " enumerable");
     40        assertEq(desc.configurable, orig.configurable, objType + prop + " configurable");
     41    }
     42 
     43    check();
     44 
     45    if (orig && orig.configurable) {
     46        if(options.refresh) { obj = options.strict ? strictArgs() : normalArgs(); }
     47        Object.defineProperty(obj, prop, {writable: false, enumerable: true});
     48        check();
     49 
     50        if(options.refresh) { obj = options.strict ? strictArgs() : normalArgs(); }
     51        Object.defineProperty(obj, prop, {writable: true, enumerable: false});
     52        check();
     53 
     54        if(options.refresh) { obj = options.strict ? strictArgs() : normalArgs(); }
     55        Object.defineProperty(obj, prop, {writable: false, configurable: false});
     56        check();
     57    }
     58 }
     59 
     60 checkProperty({strict: true, refresh: true}, 'callee', true);
     61 checkProperty({strict: true, refresh: false}, 'callee', true);
     62 checkProperty({strict: false, refresh: true}, 'callee', false);
     63 checkProperty({strict: false, refresh: false}, 'callee', false);
     64 
     65 checkProperty({strict: true, refresh: true}, 'length', false);
     66 checkProperty({strict: true, refresh: false}, 'length', false);
     67 checkProperty({strict: false, refresh: true}, 'length', false);
     68 checkProperty({strict: false, refresh: false}, 'length', false);
     69 
     70 for (var i = 0; i <= 5; i++) {
     71    checkProperty({strict: true, refresh: true}, "" + i, false);
     72    checkProperty({strict: true, refresh: false}, "" + i, false);
     73    checkProperty({strict: false, refresh: true}, "" + i, false);
     74    checkProperty({strict: false, refresh: false}, "" + i, false);
     75 }