src/test/cpp/util/file_test.cc

// Copyright 2014 The Bazel Authors. All rights reserved.
//
// 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 <string.h>

#include <memory>  // unique_ptr
#include <thread>  // NOLINT (to slience Google-internal linter)

#include "src/main/cpp/util/file.h"
#include "src/main/cpp/util/file_platform.h"
#include "gtest/gtest.h"

namespace blaze_util {

TEST(FileTest, TestSingleThreadedPipe) {
  std::unique_ptr<IPipe> pipe(CreatePipe());
  char buffer[50] = {0};
  ASSERT_TRUE(pipe.get()->Send("hello", 5));
  ASSERT_EQ(3, pipe.get()->Receive(buffer, 3));
  ASSERT_TRUE(pipe.get()->Send(" world", 6));
  ASSERT_EQ(5, pipe.get()->Receive(buffer + 3, 5));
  ASSERT_EQ(3, pipe.get()->Receive(buffer + 8, 40));
  ASSERT_EQ(0, strncmp(buffer, "hello world", 11));
}

TEST(FileTest, TestMultiThreadedPipe) {
  std::unique_ptr<IPipe> pipe(CreatePipe());
  char buffer[50] = {0};
  std::thread writer_thread([&pipe]() {
    ASSERT_TRUE(pipe.get()->Send("hello", 5));
    ASSERT_TRUE(pipe.get()->Send(" world", 6));
  });

  ASSERT_EQ(3, pipe.get()->Receive(buffer, 3));
  ASSERT_EQ(5, pipe.get()->Receive(buffer + 3, 5));
  ASSERT_EQ(3, pipe.get()->Receive(buffer + 8, 40));
  writer_thread.join();

  ASSERT_EQ(0, strncmp(buffer, "hello world", 11));
}

}  // namespace blaze_util