js/src/jsapi-tests/testUncaughtSymbol.cpp
author Jon Coppeard <jcoppeard@mozilla.com>
Mon, 14 Jan 2019 11:02:35 +0000
changeset 453704 1cebf4f5c850ad22500a360c2742de3c9dd78c81
parent 448947 6f3709b3878117466168c40affa7bca0b60cf75b
permissions -rw-r--r--
Bug 1519397 - Factor GC locking RAII classes out of vm/Runtime.h r=pbone

/* 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 "jsapi-tests/tests.h"

using JS::CreateError;
using JS::ObjectValue;
using JS::Rooted;
using JS::Value;

enum SymbolExceptionType {
  NONE,
  SYMBOL_ITERATOR,
  SYMBOL_FOO,
  SYMBOL_EMPTY,
};

BEGIN_TEST(testUncaughtSymbol) {
  CHECK(!execDontReport("throw Symbol.iterator;", __FILE__, __LINE__));
  CHECK(GetSymbolExceptionType(cx) == SYMBOL_ITERATOR);

  CHECK(!execDontReport("throw Symbol('foo');", __FILE__, __LINE__));
  CHECK(GetSymbolExceptionType(cx) == SYMBOL_FOO);

  CHECK(!execDontReport("throw Symbol();", __FILE__, __LINE__));
  CHECK(GetSymbolExceptionType(cx) == SYMBOL_EMPTY);

  return true;
}

static SymbolExceptionType GetSymbolExceptionType(JSContext* cx) {
  JS::RootedValue exn(cx);
  MOZ_RELEASE_ASSERT(JS_GetPendingException(cx, &exn));
  MOZ_RELEASE_ASSERT(exn.isSymbol());
  JS_ClearPendingException(cx);

  js::ErrorReport report(cx);
  MOZ_RELEASE_ASSERT(report.init(cx, exn, js::ErrorReport::WithSideEffects));

  if (strcmp(report.toStringResult().c_str(),
             "uncaught exception: Symbol(Symbol.iterator)") == 0) {
    return SYMBOL_ITERATOR;
  }
  if (strcmp(report.toStringResult().c_str(),
             "uncaught exception: Symbol(foo)") == 0) {
    return SYMBOL_FOO;
  }
  if (strcmp(report.toStringResult().c_str(), "uncaught exception: Symbol()") ==
      0) {
    return SYMBOL_EMPTY;
  }
  MOZ_CRASH("Unexpected symbol");
}

END_TEST(testUncaughtSymbol)