// Copyright 2018 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#include <stdint.h>
#include <sys/syscall.h>
#include <unistd.h>

#include "test/util/test_util.h"

namespace gvisor {
namespace testing {

TEST(BrkTest, BrkSyscallReturnsOldBrkOnFailure) {
  auto old_brk = sbrk(0);
  EXPECT_THAT(syscall(SYS_brk, reinterpret_cast<void*>(-1)),
              SyscallSucceedsWithValue(reinterpret_cast<uintptr_t>(old_brk)));
}

}  // namespace testing
}  // namespace gvisor
