extension-methods-reject-null-undefined-this.js

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// |reftest| skip-if(!Object.prototype.toSource)

/*

 * Any copyright is dedicated to the Public Domain.

 * http://creativecommons.org/licenses/publicdomain/

*/

//-----------------------------------------------------------------------------

var BUGNUMBER = 619283;

var summary =

  "ECMAScript built-in methods that immediately throw when |this| is " +

  "|undefined| or |null| (due to CheckObjectCoercible, ToObject, or ToString)";

print(BUGNUMBER + ": " + summary);

/**************

 * BEGIN TEST *

 **************/

// This test fills out for the non-standard methods which

// non262/misc/builtin-methods-reject-null-undefined-this.js declines to test.

var ClassToMethodMap =

    Object:   ["toSource"],

    Function: ["toSource"],

    Array:    ["toSource"],

    String:   ["toSource"],

    Boolean:  ["toSource"],

    Number:   ["toSource"],

    Date:     ["toSource"],

    RegExp:   ["toSource"],

    Error:    ["toSource"],

};

var badThisValues = [null, undefined];

function testMethod(Class, className, method)

  var expr;

  // Try out explicit this values

  for (var i = 0, sz = badThisValues.length; i < sz; i++)

    var badThis = badThisValues[i];

    expr = className + ".prototype." + method + ".call(" + badThis + ")";

try

      Class.prototype[method].call(badThis);

      throw new Error(expr + " didn't throw a TypeError");

    catch (e)

      assertEq(e instanceof TypeError, true,

               "wrong error for " + expr + ", instead threw " + e);

    expr = className + ".prototype." + method + ".apply(" + badThis + ")";

try

      Class.prototype[method].apply(badThis);

      throw new Error(expr + " didn't throw a TypeError");

    catch (e)

      assertEq(e instanceof TypeError, true,

               "wrong error for " + expr + ", instead threw " + e);

  // ..and for good measure..

  expr = "(0, " + className + ".prototype." + method + ")()"

try

    // comma operator to call GetValue() on the method and de-Reference it

    (0, Class.prototype[method])();

    throw new Error(expr + " didn't throw a TypeError");

  catch (e)

    assertEq(e instanceof TypeError, true,

             "wrong error for " + expr + ", instead threw " + e);

for (var className in ClassToMethodMap)

  var Class = this[className];

  var methodNames = ClassToMethodMap[className];

  for (var i = 0, sz = methodNames.length; i < sz; i++)

    var method = methodNames[i];

    testMethod(Class, className, method);

/******************************************************************************/

if (typeof reportCompare === "function")

  reportCompare(true, true);

print("All tests passed!");