surfaces-01.js (864B)
1 // Check superficial characteristics of functions and properties (not functionality). 2 3 function checkFunction(obj, name, nargs) { 4 var desc = Object.getOwnPropertyDescriptor(obj, name); 5 assertEq(desc.configurable, true, name + " should be configurable"); 6 assertEq(desc.writable, true, name + " should be writable"); 7 assertEq(desc.enumerable, false, name + " should be non-enumerable"); 8 assertEq(desc.value, obj[name]); // well obviously 9 assertEq(typeof desc.value, 'function', name + " should be a function"); 10 assertEq(desc.value.length, nargs, name + " should have .length === " + nargs); 11 } 12 13 checkFunction(this, "Debugger", 1); 14 15 assertEq(Debugger.prototype.constructor, Debugger); 16 assertEq(Object.prototype.toString.call(Debugger.prototype), "[object Debugger]"); 17 assertEq(Object.getPrototypeOf(Debugger.prototype), Object.prototype);