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ES5Harness.registerTest( {
id: "15.4.4.20-6-2",

path: "TestCases/chapter15/15.4/15.4.4/15.4.4.20/15.4.4.20-6-2.js",

description: "Array.prototype.filter returns an empty array if 'length' is 0 (subclassed Array, length overridden to null (type conversion))",

test: function testcase() {
  foo.prototype = new Array(1, 2, 3);
  function foo() {}
  var f = new foo();
  f.length = null;
  
  function cb(){}
  var a = f.filter(cb);
  
  if (Array.isArray(a) &&
      a.length === 0) {
    return true;
  }
 },

precondition: function prereq() {
  return fnExists(Array.prototype.filter,Array.isArray);
 }
});