The Tor Browser: js/src/tests/ecma_5/Function/function-bind.js@6474c204b198 (annotated)

js/src/tests/ecma_5/Function/function-bind.js@6474c204b198 (annotated)

js/src/tests/ecma_5/Function/function-bind.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.

 /*
  * Any copyright is dedicated to the Public Domain.
  * http://creativecommons.org/licenses/publicdomain/
  */
 var gTestfile = 'function-bind.js';
 var BUGNUMBER = 429507;
 var summary = "ES5: Function.prototype.bind";
 print(BUGNUMBER + ": " + summary);
 /**************
  * BEGIN TEST *
  **************/
 // ad-hoc testing
 assertEq(Function.prototype.hasOwnProperty("bind"), true);
 var bind = Function.prototype.bind;
 assertEq(bind.length, 1);
 var strictReturnThis = function() { "use strict"; return this; };
 assertEq(strictReturnThis.bind(undefined)(), undefined);
 assertEq(strictReturnThis.bind(null)(), null);
 var obj = {};
 assertEq(strictReturnThis.bind(obj)(), obj);
 assertEq(strictReturnThis.bind(NaN)(), NaN);
 assertEq(strictReturnThis.bind(true)(), true);
 assertEq(strictReturnThis.bind(false)(), false);
 assertEq(strictReturnThis.bind("foopy")(), "foopy");
 // rigorous, step-by-step testing
 function expectThrowTypeError(fun)
 {
   try
   {
     var r = fun();
     throw new Error("didn't throw TypeError, returned " + r);
   }
   catch (e)
   {
     assertEq(e instanceof TypeError, true,
              "didn't throw TypeError, got: " + e);
   }
 }
 /*
  * 1. Let Target be the this value.
  * 2. If IsCallable(Target) is false, throw a TypeError exception.
  */
 expectThrowTypeError(function() { bind.call(null); });
 expectThrowTypeError(function() { bind.call(undefined); });
 expectThrowTypeError(function() { bind.call(NaN); });
 expectThrowTypeError(function() { bind.call(0); });
 expectThrowTypeError(function() { bind.call(-0); });
 expectThrowTypeError(function() { bind.call(17); });
 expectThrowTypeError(function() { bind.call(42); });
 expectThrowTypeError(function() { bind.call("foobar"); });
 expectThrowTypeError(function() { bind.call(true); });
 expectThrowTypeError(function() { bind.call(false); });
 expectThrowTypeError(function() { bind.call([]); });
 expectThrowTypeError(function() { bind.call({}); });
 /*
  * 3. Let A be a new (possibly empty) internal list of all of the argument
  *    values provided after thisArg (arg1, arg2 etc), in order.
  * 4. Let F be a new native ECMAScript object .
  * 5. Set all the internal methods, except for [[Get]], of F as specified in
  *    8.12.
  * 6. Set the [[Get]] internal property of F as specified in 15.3.5.4.
  * 7. Set the [[TargetFunction]] internal property of F to Target.
  * 8. Set the [[BoundThis]] internal property of F to the value of thisArg.
  * 9. Set the [[BoundArgs]] internal property of F to A.
  */
 // throughout
 /* 10. Set the [[Class]] internal property of F to "Function". */
 var toString = Object.prototype.toString;
 assertEq(toString.call(function(){}), "[object Function]");
 assertEq(toString.call(function a(){}), "[object Function]");
 assertEq(toString.call(function(a){}), "[object Function]");
 assertEq(toString.call(function a(b){}), "[object Function]");
 assertEq(toString.call(function(){}.bind()), "[object Function]");
 assertEq(toString.call(function a(){}.bind()), "[object Function]");
 assertEq(toString.call(function(a){}.bind()), "[object Function]");
 assertEq(toString.call(function a(b){}.bind()), "[object Function]");
 /*
  * 11. Set the [[Prototype]] internal property of F to the standard built-in
  *     Function prototype object as specified in 15.3.3.1.
  */
 assertEq(Object.getPrototypeOf(bind.call(function(){})), Function.prototype);
 assertEq(Object.getPrototypeOf(bind.call(function a(){})), Function.prototype);
 assertEq(Object.getPrototypeOf(bind.call(function(a){})), Function.prototype);
 assertEq(Object.getPrototypeOf(bind.call(function a(b){})), Function.prototype);
 /*
  * 12. Set the [[Call]] internal property of F as described in 15.3.4.5.1.
  */
 var a = Array.bind(1, 2);
 assertEq(a().length, 2);
 assertEq(a(4).length, 2);
 assertEq(a(4, 8).length, 3);
 function t() { return this; }
 var bt = t.bind(t);
 assertEq(bt(), t);
 function callee() { return arguments.callee; }
 var call = callee.bind();
 assertEq(call(), callee);
 assertEq(new call(), callee);
 /*
  * 13. Set the [[Construct]] internal property of F as described in 15.3.4.5.2.
  */
 function Point(x, y)
 {
   this.x = x;
   this.y = y;
 }
 var YAxisPoint = Point.bind(null, 0)
 assertEq(YAxisPoint.hasOwnProperty("prototype"), false);
 var p = new YAxisPoint(5);
 assertEq(p.x, 0);
 assertEq(p.y, 5);
 assertEq(p instanceof Point, true);
 assertEq(p instanceof YAxisPoint, true);
 assertEq(Object.prototype.toString.call(YAxisPoint), "[object Function]");
 assertEq(YAxisPoint.length, 1);
 /*
  * 14. Set the [[HasInstance]] internal property of F as described in
  *     15.3.4.5.3.
  */
 function JoinArguments()
 {
   this.args = Array.prototype.join.call(arguments, ", ");
 }
 var Join1 = JoinArguments.bind(null, 1);
 var Join2 = Join1.bind(null, 2);
 var Join3 = Join2.bind(null, 3);
 var Join4 = Join3.bind(null, 4);
 var Join5 = Join4.bind(null, 5);
 var Join6 = Join5.bind(null, 6);
 var r = new Join6(7);
 assertEq(r instanceof Join6, true);
 assertEq(r instanceof Join5, true);
 assertEq(r instanceof Join4, true);
 assertEq(r instanceof Join3, true);
 assertEq(r instanceof Join2, true);
 assertEq(r instanceof Join1, true);
 assertEq(r instanceof JoinArguments, true);
 assertEq(r.args, "1, 2, 3, 4, 5, 6, 7");
 /*
  * 15. If the [[Class]] internal property of Target is "Function", then
  *   a. Let L be the length property of Target minus the length of A.
  *   b. Set the length own property of F to either 0 or L, whichever is larger.
  * 16. Else set the length own property of F to 0.
  */
 function none() { return arguments.length; }
 assertEq(none.bind(1, 2)(3, 4), 3);
 assertEq(none.bind(1, 2)(), 1);
 assertEq(none.bind(1)(2, 3), 2);
 assertEq(none.bind().length, 0);
 assertEq(none.bind(null).length, 0);
 assertEq(none.bind(null, 1).length, 0);
 assertEq(none.bind(null, 1, 2).length, 0);
 function one(a) { }
 assertEq(one.bind().length, 1);
 assertEq(one.bind(null).length, 1);
 assertEq(one.bind(null, 1).length, 0);
 assertEq(one.bind(null, 1, 2).length, 0);
 // retch
 var br = Object.create(null, { length: { value: 0 } });
 try
 {
   br = bind.call(/a/g, /a/g, "aaaa");
 }
 catch (e) { /* nothing */ }
 assertEq(br.length, 0);
 /*
  * 17. Set the attributes of the length own property of F to the values
  *     specified in 15.3.5.1.
  */
 var len1Desc =
   Object.getOwnPropertyDescriptor(function(a, b, c){}.bind(), "length");
 assertEq(len1Desc.value, 3);
 assertEq(len1Desc.writable, false);
 assertEq(len1Desc.enumerable, false);
 assertEq(len1Desc.configurable, false);
 var len2Desc =
   Object.getOwnPropertyDescriptor(function(a, b, c){}.bind(null, 2), "length");
 assertEq(len2Desc.value, 2);
 assertEq(len2Desc.writable, false);
 assertEq(len2Desc.enumerable, false);
 assertEq(len2Desc.configurable, false);
 /*
  * 18. Set the [[Extensible]] internal property of F to true.
  */
 var bound = (function() { }).bind();
 var isExtensible = Object.isExtensible || function() { return true; };
 assertEq(isExtensible(bound), true);
 bound.foo = 17;
 var fooDesc = Object.getOwnPropertyDescriptor(bound, "foo");
 assertEq(fooDesc.value, 17);
 assertEq(fooDesc.writable, true);
 assertEq(fooDesc.enumerable, true);
 assertEq(fooDesc.configurable, true);
 /*
  * 19. Let thrower be the [[ThrowTypeError]] function Object (13.2.3).
  * 20. Call the [[DefineOwnProperty]] internal method of F with arguments
  *     "caller", PropertyDescriptor {[[Get]]: thrower, [[Set]]: thrower,
  *     [[Enumerable]]: false, [[Configurable]]: false}, and false.
  * 21. Call the [[DefineOwnProperty]] internal method of F with arguments
  *     "arguments", PropertyDescriptor {[[Get]]: thrower, [[Set]]: thrower,
  *     [[Enumerable]]: false, [[Configurable]]: false}, and false.
  */
 function f() { "use strict"; }
 var canonicalTTE = Object.getOwnPropertyDescriptor(f, "caller").get;
 var tte;
 var boundf = f.bind();
 var boundfCaller = Object.getOwnPropertyDescriptor(boundf, "caller");
 assertEq("get" in boundfCaller, true);
 assertEq("set" in boundfCaller, true);
 tte = boundfCaller.get;
 assertEq(tte, canonicalTTE);
 assertEq(tte, boundfCaller.set);
 var boundfArguments = Object.getOwnPropertyDescriptor(boundf, "arguments");
 assertEq("get" in boundfArguments, true);
 assertEq("set" in boundfArguments, true);
 tte = boundfArguments.get;
 assertEq(tte, canonicalTTE);
 assertEq(tte, boundfArguments.set);
 /* 22. Return F. */
 var passim = function p(){}.bind(1);
 assertEq(typeof passim, "function");
 /******************************************************************************/
 if (typeof reportCompare === "function")
   reportCompare(true, true);
 print("All tests passed!");