text: // 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 <stdio.h>
  #include <sys/un.h>
  
  #include "gtest/gtest.h"
  #include "test/syscalls/linux/socket_test_util.h"
  #include "test/syscalls/linux/unix_domain_socket_test_util.h"
  #include "test/util/test_util.h"
  
  namespace gvisor {
  namespace testing {
  
  namespace {
  
  // Test fixture for tests that apply to pairs of connected non-blocking dgram
  // unix sockets.
  using NonBlockingDgramUnixSocketPairTest = SocketPairTest;
  
  TEST_P(NonBlockingDgramUnixSocketPairTest, ReadOneSideClosed) {
    if (IsRunningOnGvisor()) {
      // FIXME(b/70803293): gVisor datagram sockets return 0 instead of
      // EAGAIN.
      return;
    }
  
    auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
    ASSERT_THAT(close(sockets->release_first_fd()), SyscallSucceeds());
    char data[10] = {};
    ASSERT_THAT(read(sockets->second_fd(), data, sizeof(data)),
                SyscallFailsWithErrno(EAGAIN));
  }
  
  INSTANTIATE_TEST_SUITE_P(
      NonBlockingDgramUnixSockets, NonBlockingDgramUnixSocketPairTest,
      ::testing::ValuesIn(IncludeReversals(std::vector<SocketPairKind>{
          UnixDomainSocketPair(SOCK_DGRAM | SOCK_NONBLOCK),
          FilesystemBoundUnixDomainSocketPair(SOCK_DGRAM | SOCK_NONBLOCK),
          AbstractBoundUnixDomainSocketPair(SOCK_DGRAM | SOCK_NONBLOCK),
      })));
  
  }  // namespace
  
  }  // namespace testing
  }  // namespace gvisor
  