js/src/jsapi-tests/testCallArgs.cpp

   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 "mozilla/Utf8.h"  // mozilla::Utf8Unit
   6
   7 #include "js/CompilationAndEvaluation.h"  // JS::Evaluate
   8 #include "js/PropertyAndElement.h"        // JS_DefineFunction
   9 #include "js/SourceText.h"                // JS::Source{Ownership,Text}
  10 #include "jsapi-tests/tests.h"
  11
  12 static bool CustomNative(JSContext* cx, unsigned argc, JS::Value* vp) {
  13   JS::CallArgs args = JS::CallArgsFromVp(argc, vp);
  14
  15   MOZ_RELEASE_ASSERT(!JS_IsExceptionPending(cx));
  16
  17   MOZ_RELEASE_ASSERT(!args.isConstructing());
  18   args.rval().setUndefined();
  19   MOZ_RELEASE_ASSERT(!args.isConstructing());
  20
  21   return true;
  22 }
  23
  24 BEGIN_TEST(testCallArgs_isConstructing_native) {
  25   CHECK(JS_DefineFunction(cx, global, "customNative", CustomNative, 0, 0));
  26
  27   JS::CompileOptions opts(cx);
  28   opts.setFileAndLine(__FILE__, __LINE__ + 4);
  29
  30   JS::RootedValue result(cx);
  31
  32   static const char code[] = "new customNative();";
  33   JS::SourceText<mozilla::Utf8Unit> srcBuf;
  34   CHECK(srcBuf.init(cx, code, strlen(code), JS::SourceOwnership::Borrowed));
  35
  36   CHECK(!JS::Evaluate(cx, opts, srcBuf, &result));
  37
  38   CHECK(JS_IsExceptionPending(cx));
  39   JS_ClearPendingException(cx);
  40
  41   EVAL("customNative();", &result);
  42   CHECK(result.isUndefined());
  43
  44   return true;
  45 }
  46 END_TEST(testCallArgs_isConstructing_native)
  47
  48 static bool CustomConstructor(JSContext* cx, unsigned argc, JS::Value* vp) {
  49   JS::CallArgs args = JS::CallArgsFromVp(argc, vp);
  50
  51   MOZ_RELEASE_ASSERT(!JS_IsExceptionPending(cx));
  52
  53   if (args.isConstructing()) {
  54     JSObject* obj = JS_NewPlainObject(cx);
  55     if (!obj) {
  56       return false;
  57     }
  58
  59     args.rval().setObject(*obj);
  60
  61     MOZ_RELEASE_ASSERT(args.isConstructing());
  62   } else {
  63     args.rval().setUndefined();
  64
  65     MOZ_RELEASE_ASSERT(!args.isConstructing());
  66   }
  67
  68   return true;
  69 }
  70
  71 BEGIN_TEST(testCallArgs_isConstructing_constructor) {
  72   CHECK(JS_DefineFunction(cx, global, "customConstructor", CustomConstructor, 0,
  73                           JSFUN_CONSTRUCTOR));
  74
  75   JS::RootedValue result(cx);
  76
  77   EVAL("new customConstructor();", &result);
  78   CHECK(result.isObject());
  79
  80   EVAL("customConstructor();", &result);
  81   CHECK(result.isUndefined());
  82
  83   return true;
  84 }
  85 END_TEST(testCallArgs_isConstructing_constructor)