text: /**
   *
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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.
   */
  
  #pragma once
  
  #include <string>
  
  #include "../../test/TestBase.h"
  #include "utils/file/FileUtils.h"
  #include "utils/Environment.h"
  #include "utils/TimeUtil.h"
  
  namespace org {
  namespace apache {
  namespace nifi {
  namespace minifi {
  namespace utils {
  
  std::string createTempDir(TestController* testController) {
    char dirtemplate[] = "/tmp/gt.XXXXXX";
    std::string temp_dir = testController->createTempDirectory(dirtemplate);
    REQUIRE(!temp_dir.empty());
    REQUIRE(file::FileUtils::is_directory(temp_dir.c_str()));
    return temp_dir;
  }
  
  std::string putFileToDir(const std::string& dir_path, const std::string& file_name, const std::string& content) {
    std::string file_path(file::FileUtils::concat_path(dir_path, file_name));
    std::ofstream out_file(file_path, std::ios::binary | std::ios::out);
    if (out_file.is_open()) {
      out_file << content;
    }
    return file_path;
  }
  
  std::string createTempDirWithFile(TestController* testController, const std::string& file_name, const std::string& content) {
    std::string temp_dir = createTempDir(testController);
    putFileToDir(temp_dir, file_name, content);
    return temp_dir;
  }
  
  std::string getFileContent(const std::string& file_name) {
    std::ifstream file_handle(file_name, std::ios::binary | std::ios::in);
    REQUIRE(file_handle.is_open());
    const std::string file_content{ (std::istreambuf_iterator<char>(file_handle)), (std::istreambuf_iterator<char>()) };
    return file_content;
  }
  
  class ManualClock : public timeutils::Clock {
   public:
    std::chrono::milliseconds timeSinceEpoch() const override { return time_; }
    void advance(std::chrono::milliseconds elapsed_time) { time_ += elapsed_time; }
  
   private:
    std::chrono::milliseconds time_{0};
  };
  
  }  // namespace utils
  }  // namespace minifi
  }  // namespace nifi
  }  // namespace apache
  }  // namespace org
  