Quelle testFunctionBinding.cpp Sprache: C

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sts=2 et sw=2 tw=80:
*
* Test function name binding.
*/
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "mozilla/Utf8.h"  // mozilla::Utf8Unit

#include "js/CallAndConstruct.h"
#include "js/CompilationAndEvaluation.h"  // JS::CompileFunction
#include "js/EnvironmentChain.h"          // JS::EnvironmentChain
#include "js/SourceText.h"                // JS::Source{Ownership,Text}
#include "jsapi-tests/tests.h"
#include "util/Text.h"

using namespace js;

BEGIN_TEST(test_functionBinding) {
  RootedFunction fun(cx);

  JS::CompileOptions options(cx);
  options.setFileAndLine(__FILE__, __LINE__);

  JS::EnvironmentChain emptyEnvChain(cx, JS::SupportUnscopables::No);

  // Named function shouldn't have it's binding.
  {
    static const char s1chars[] = "return (typeof s1) == 'undefined';";

    JS::SourceText<mozilla::Utf8Unit> srcBuf;
    CHECK(srcBuf.init(cx, s1chars, js_strlen(s1chars),
                      JS::SourceOwnership::Borrowed));

    fun = JS::CompileFunction(cx, emptyEnvChain, options, "s1", 0, nullptr,
                              srcBuf);
    CHECK(fun);
  }

  JS::RootedValueVector args(cx);
  RootedValue rval(cx);
  CHECK(JS::Call(cx, UndefinedHandleValue, fun, args, &rval));
  CHECK(rval.isBoolean());
  CHECK(rval.toBoolean());

  // Named function shouldn't have `anonymous` binding.
  {
    static const char s2chars[] = "return (typeof anonymous) == 'undefined';";

    JS::SourceText<mozilla::Utf8Unit> srcBuf;
    CHECK(srcBuf.init(cx, s2chars, js_strlen(s2chars),
                      JS::SourceOwnership::Borrowed));

    fun = JS::CompileFunction(cx, emptyEnvChain, options, "s2", 0, nullptr,
                              srcBuf);
    CHECK(fun);
  }

  CHECK(JS::Call(cx, UndefinedHandleValue, fun, args, &rval));
  CHECK(rval.isBoolean());
  CHECK(rval.toBoolean());

  // Anonymous function shouldn't have `anonymous` binding.
  {
    static const char s3chars[] = "return (typeof anonymous) == 'undefined';";

    JS::SourceText<mozilla::Utf8Unit> srcBuf;
    CHECK(srcBuf.init(cx, s3chars, js_strlen(s3chars),
                      JS::SourceOwnership::Borrowed));

    fun = JS::CompileFunction(cx, emptyEnvChain, options, nullptr, 0, nullptr,
                              srcBuf);
    CHECK(fun);
  }

  CHECK(JS::Call(cx, UndefinedHandleValue, fun, args, &rval));
  CHECK(rval.isBoolean());
  CHECK(rval.toBoolean());

  return true;
}
END_TEST(test_functionBinding)

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