Function test_ret_code_comm

test/test_ret_code.cc:24–34

}

void test_ret_code_comm()
{
  using namespace sp;
  auto cat = Popen({"cat", "../subprocess.hpp"}, output{PIPE});
  auto grep = Popen({"grep", "template"}, input{cat.output()}, output{PIPE});
  auto cut = Popen({"cut", "-d,", "-f", "1"}, input{grep.output()}, output{PIPE});
  auto res = cut.communicate().first;
  std::cout << res.buf.data() << std::endl;

  std::cout << "retcode: " << cut.retcode() << std::endl;
}

void test_ret_code_check_output()
{