tor-browser

The Tor Browser
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testObjectEmulatingUndefined.cpp (3421B)

      1 /* This Source Code Form is subject to the terms of the Mozilla Public
      2 * License, v. 2.0. If a copy of the MPL was not distributed with this
      3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      4 
      5 #include "jsapi-tests/tests.h"
      6 
      7 static const JSClass ObjectEmulatingUndefinedClass = {
      8    "ObjectEmulatingUndefined",
      9    JSCLASS_EMULATES_UNDEFINED,
     10 };
     11 
     12 static bool ObjectEmulatingUndefinedConstructor(JSContext* cx, unsigned argc,
     13                                                JS::Value* vp) {
     14  JS::CallArgs args = JS::CallArgsFromVp(argc, vp);
     15  JSObject* obj =
     16      JS_NewObjectForConstructor(cx, &ObjectEmulatingUndefinedClass, args);
     17  if (!obj) {
     18    return false;
     19  }
     20  args.rval().setObject(*obj);
     21  return true;
     22 }
     23 
     24 BEGIN_TEST(testObjectEmulatingUndefined_truthy) {
     25  CHECK(JS_InitClass(cx, global, nullptr, nullptr, "ObjectEmulatingUndefined",
     26                     ObjectEmulatingUndefinedConstructor, 0, nullptr, nullptr,
     27                     nullptr, nullptr));
     28 
     29  JS::RootedValue result(cx);
     30 
     31  EVAL("if (new ObjectEmulatingUndefined()) true; else false;", &result);
     32  CHECK(result.isFalse());
     33 
     34  EVAL("if (!new ObjectEmulatingUndefined()) true; else false;", &result);
     35  CHECK(result.isTrue());
     36 
     37  EVAL(
     38      "var obj = new ObjectEmulatingUndefined(); \n"
     39      "var res = []; \n"
     40      "for (var i = 0; i < 50; i++) \n"
     41      "  res.push(Boolean(obj)); \n"
     42      "res.every(function(v) { return v === false; });",
     43      &result);
     44  CHECK(result.isTrue());
     45 
     46  return true;
     47 }
     48 END_TEST(testObjectEmulatingUndefined_truthy)
     49 
     50 BEGIN_TEST(testObjectEmulatingUndefined_equal) {
     51  CHECK(JS_InitClass(cx, global, nullptr, nullptr, "ObjectEmulatingUndefined",
     52                     ObjectEmulatingUndefinedConstructor, 0, nullptr, nullptr,
     53                     nullptr, nullptr));
     54 
     55  JS::RootedValue result(cx);
     56 
     57  EVAL("if (new ObjectEmulatingUndefined() == undefined) true; else false;",
     58       &result);
     59  CHECK(result.isTrue());
     60 
     61  EVAL("if (new ObjectEmulatingUndefined() == null) true; else false;",
     62       &result);
     63  CHECK(result.isTrue());
     64 
     65  EVAL("if (new ObjectEmulatingUndefined() != undefined) true; else false;",
     66       &result);
     67  CHECK(result.isFalse());
     68 
     69  EVAL("if (new ObjectEmulatingUndefined() != null) true; else false;",
     70       &result);
     71  CHECK(result.isFalse());
     72 
     73  EVAL(
     74      "var obj = new ObjectEmulatingUndefined(); \n"
     75      "var res = []; \n"
     76      "for (var i = 0; i < 50; i++) \n"
     77      "  res.push(obj == undefined); \n"
     78      "res.every(function(v) { return v === true; });",
     79      &result);
     80  CHECK(result.isTrue());
     81 
     82  EVAL(
     83      "var obj = new ObjectEmulatingUndefined(); \n"
     84      "var res = []; \n"
     85      "for (var i = 0; i < 50; i++) \n"
     86      "  res.push(obj == null); \n"
     87      "res.every(function(v) { return v === true; });",
     88      &result);
     89  CHECK(result.isTrue());
     90 
     91  EVAL(
     92      "var obj = new ObjectEmulatingUndefined(); \n"
     93      "var res = []; \n"
     94      "for (var i = 0; i < 50; i++) \n"
     95      "  res.push(obj != undefined); \n"
     96      "res.every(function(v) { return v === false; });",
     97      &result);
     98  CHECK(result.isTrue());
     99 
    100  EVAL(
    101      "var obj = new ObjectEmulatingUndefined(); \n"
    102      "var res = []; \n"
    103      "for (var i = 0; i < 50; i++) \n"
    104      "  res.push(obj != null); \n"
    105      "res.every(function(v) { return v === false; });",
    106      &result);
    107  CHECK(result.isTrue());
    108 
    109  return true;
    110 }
    111 END_TEST(testObjectEmulatingUndefined_equal)