bug717466.js - mozsearch

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function Person(){}

function Ninja(){}

Ninja.prototype = new Person();

function House(){}

var empty = {};

var person = new Person();

var ninja = new Ninja();

var house = new House();

var string = new String();

var bindNinja = Ninja.bind({});

var array = {};

array.__proto__ = Array.prototype;

var array2 = {};

array2.__proto__ = array.prototype;

function test(v, v2) {

  return v instanceof v2;

function test2(v, v2) {

  return v instanceof v2;

function test3(v, v2) {

  return v instanceof v2;

function test4(v, v2) {

  return v instanceof v2;

// Test if specialized for object works

for (var i=0; i!=41; i++) {

  assertEq(test(person, Person), true);

  assertEq(test(empty, Person), false);

  assertEq(test(ninja, Person), true);

  assertEq(test(house, Person), false);

  assertEq(test(string, Person), false);

  assertEq(test(new bindNinja(), Person), true);

  assertEq(test(new Ninja(), bindNinja), true);

  assertEq(test(string, String), true);

  assertEq(test(array, Array), true);

  assertEq(test(empty, Object), true);

  // Test if bailout works

  assertEq(test(0.1, Object), false);

  // Should generate TypeError

  var err = false;

  try {

    test(0.1, 5);

  } catch (e) { err = true; }

  assertEq(err, true);

  // Should generate TypeError

  var err = false;

  try {

    test(empty, empty);

  } catch (e) { err = true; }

  assertEq(err, true);

  // Should generate TypeError

  var err = false;

  try {

    test(5.0, empty);

  } catch (e) { err = true; }

  assertEq(err, true);

// Test if specialized for non-object lhs

for (var i=0; i!=41; i++) {

  assertEq(test2(0.1, Object), false);

// Check if we don't regress on https://bugzilla.mozilla.org/show_bug.cgi?id=7635

function Foo() {};

theproto = {};

Foo.prototype = theproto;

for (var i=0; i!=41; i++) {

  assertEq(test3(theproto, Foo), false);