js/src/jsapi-tests/testArgumentsObject.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
   2  * vim: set ts=8 sts=2 et sw=2 tw=80:
   3  */
   4 /* This Source Code Form is subject to the terms of the Mozilla Public
   5  * License, v. 2.0. If a copy of the MPL was not distributed with this
   6  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   7
   8 #include "jsapi-tests/tests.h"
   9
  10 #include "vm/ArgumentsObject-inl.h"
  11 #include "vm/JSObject-inl.h"
  12
  13 using namespace js;
  14
  15 static const char NORMAL_ZERO[] = "function f() { return arguments; }";
  16 static const char NORMAL_ONE[] = "function f(a) { return arguments; }";
  17 static const char NORMAL_TWO[] = "function f(a, b) { return arguments; }";
  18 static const char NORMAL_THREE[] = "function f(a, b, c) { return arguments; }";
  19
  20 static const char STRICT_ZERO[] =
  21     "function f() { 'use strict'; return arguments; }";
  22 static const char STRICT_ONE[] =
  23     "function f() { 'use strict'; return arguments; }";
  24 static const char STRICT_TWO[] =
  25     "function f() { 'use strict'; return arguments; }";
  26 static const char STRICT_THREE[] =
  27     "function f() { 'use strict'; return arguments; }";
  28
  29 static const char* const CALL_CODES[] = {"f()",           "f(0)",
  30                                          "f(0, 1)",       "f(0, 1, 2)",
  31                                          "f(0, 1, 2, 3)", "f(0, 1, 2, 3, 4)"};
  32
  33 BEGIN_TEST(testArgumentsObject) {
  34   return ExhaustiveTest<0>(NORMAL_ZERO) && ExhaustiveTest<1>(NORMAL_ZERO) &&
  35          ExhaustiveTest<2>(NORMAL_ZERO) && ExhaustiveTest<0>(NORMAL_ONE) &&
  36          ExhaustiveTest<1>(NORMAL_ONE) && ExhaustiveTest<2>(NORMAL_ONE) &&
  37          ExhaustiveTest<3>(NORMAL_ONE) && ExhaustiveTest<0>(NORMAL_TWO) &&
  38          ExhaustiveTest<1>(NORMAL_TWO) && ExhaustiveTest<2>(NORMAL_TWO) &&
  39          ExhaustiveTest<3>(NORMAL_TWO) && ExhaustiveTest<4>(NORMAL_TWO) &&
  40          ExhaustiveTest<0>(NORMAL_THREE) && ExhaustiveTest<1>(NORMAL_THREE) &&
  41          ExhaustiveTest<2>(NORMAL_THREE) && ExhaustiveTest<3>(NORMAL_THREE) &&
  42          ExhaustiveTest<4>(NORMAL_THREE) && ExhaustiveTest<5>(NORMAL_THREE) &&
  43          ExhaustiveTest<0>(STRICT_ZERO) && ExhaustiveTest<1>(STRICT_ZERO) &&
  44          ExhaustiveTest<2>(STRICT_ZERO) && ExhaustiveTest<0>(STRICT_ONE) &&
  45          ExhaustiveTest<1>(STRICT_ONE) && ExhaustiveTest<2>(STRICT_ONE) &&
  46          ExhaustiveTest<3>(STRICT_ONE) && ExhaustiveTest<0>(STRICT_TWO) &&
  47          ExhaustiveTest<1>(STRICT_TWO) && ExhaustiveTest<2>(STRICT_TWO) &&
  48          ExhaustiveTest<3>(STRICT_TWO) && ExhaustiveTest<4>(STRICT_TWO) &&
  49          ExhaustiveTest<0>(STRICT_THREE) && ExhaustiveTest<1>(STRICT_THREE) &&
  50          ExhaustiveTest<2>(STRICT_THREE) && ExhaustiveTest<3>(STRICT_THREE) &&
  51          ExhaustiveTest<4>(STRICT_THREE) && ExhaustiveTest<5>(STRICT_THREE);
  52 }
  53
  54 static const size_t MAX_ELEMS = 6;
  55
  56 template <size_t ArgCount>
  57 bool ExhaustiveTest(const char funcode[]) {
  58   RootedValue v(cx);
  59   EVAL(funcode, &v);
  60
  61   EVAL(CALL_CODES[ArgCount], &v);
  62   Rooted<ArgumentsObject*> argsobj(cx,
  63                                    &v.toObjectOrNull()->as<ArgumentsObject>());
  64
  65   JS::RootedValueArray<MAX_ELEMS> elems(cx);
  66
  67   for (size_t i = 0; i <= ArgCount; i++) {
  68     for (size_t j = 0; j <= ArgCount - i; j++) {
  69       ClearElements(elems);
  70       CHECK(argsobj->maybeGetElements(i, j, elems.begin()));
  71       for (size_t k = 0; k < j; k++) {
  72         CHECK(elems[k].isInt32(i + k));
  73       }
  74       for (size_t k = j; k < MAX_ELEMS - 1; k++) {
  75         CHECK(elems[k].isNull());
  76       }
  77       CHECK(elems[MAX_ELEMS - 1].isInt32(42));
  78     }
  79   }
  80
  81   return true;
  82 }
  83
  84 template <size_t N>
  85 static void ClearElements(JS::RootedValueArray<N>& elems) {
  86   for (size_t i = 0; i < elems.length() - 1; i++) {
  87     elems[i].setNull();
  88   }
  89   elems[elems.length() - 1].setInt32(42);
  90 }
  91 END_TEST(testArgumentsObject)