LayoutTests/ietestcenter/Javascript/TestCases/15.4.4.21-5-4.js

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ES5Harness.registerTest( {
id: "15.4.4.21-5-4",

path: "TestCases/chapter15/15.4/15.4.4/15.4.4.21/15.4.4.21-5-4.js",

description: "Array.prototype.reduce throws TypeError if 'length' is 0 (subclassed Array, length overridden to 0 (type conversion)), no initVal",

test: function testcase() {
  foo.prototype = new Array(1, 2, 3);
  function foo() {}
  var f = new foo();
  f.length = 0;
  
  function cb(){}
  try {
    f.reduce(cb);
  }
  catch (e) {
    if (e instanceof TypeError) {
      return true;
    }
  }
 },

precondition: function prereq() {
  return fnExists(Array.prototype.reduce);
 }
});