Method MakePipe

cpp/src/arrow/io/file_test.cc:557–561

class TestPipeIO : public ::testing::Test {
 public:
  void MakePipe() {
    ASSERT_OK_AND_ASSIGN(pipe_, CreatePipe());
    ASSERT_GE(pipe_.rfd.fd(), 0);
    ASSERT_GE(pipe_.rfd.fd(), 0);
  }
  void ClosePipe() {
    ASSERT_OK(pipe_.rfd.Close());
    ASSERT_OK(pipe_.wfd.Close());