# info > TAP::Parser::Iterator::Process

[TAP::Parser::Iterator::PerleProgrammers](https://www.chedong.com/phpMan.php/perldoc/TAP%3A%3AParser%3A%3AIterator%3A%3APerleProgrammers/markdown) [RTAP::Parser::Iterator](https://www.chedong.com/phpMan.php/perldoc/RTAP%3A%3AParser%3A%3AIterator/markdown)::[Process(3perl)](https://www.chedong.com/phpMan.php/man/Process/3perl/markdown)

## NAME
       [TAP::Parser::Iterator::Process](https://www.chedong.com/phpMan.php/perldoc/TAP%3A%3AParser%3A%3AIterator%3A%3AProcess/markdown) - Iterator for process-based TAP sources

## VERSION
       Version 3.43

## SYNOPSIS
         use [TAP::Parser::Iterator::Process](https://www.chedong.com/phpMan.php/perldoc/TAP%3A%3AParser%3A%3AIterator%3A%3AProcess/markdown);
         my %args = (
          command  => ['python', 'setup.py', 'test'],
          merge    => 1,
          setup    => sub { ... },
          teardown => sub { ... },
         );
         my $it   = [TAP::Parser::Iterator::Process](https://www.chedong.com/phpMan.php/perldoc/TAP%3A%3AParser%3A%3AIterator%3A%3AProcess/markdown)->new(\%args);
         my $line = $it->next;

## DESCRIPTION
       This is a simple iterator wrapper for executing external processes,
       used by [TAP::Parser](https://www.chedong.com/phpMan.php/perldoc/TAP%3A%3AParser/markdown).  Unless you're writing a plugin or subclassing,
       you probably won't need to use this module directly.

## METHODS
   Class Methods
       "new"

       Create an iterator.  Expects one argument containing a hashref of the
       form:

          command  => \@command_to_execute
          merge    => $attempt_merge_stderr_and_stdout?
          setup    => $callback_to_setup_command
          teardown => $callback_to_teardown_command

       Tries to uses [IPC::Open3](https://www.chedong.com/phpMan.php/perldoc/IPC%3A%3AOpen3/markdown) & [IO::Select](https://www.chedong.com/phpMan.php/perldoc/IO%3A%3ASelect/markdown) to communicate with the spawned
       process if they are available.  Falls back onto "open()".

   Instance Methods
       "next"

       Iterate through the process output, of course.

       "next_raw"

       Iterate raw input without applying any fixes for quirky input syntax.

       "wait"

       Get the wait status for this iterator's process.

       "exit"

       Get the exit status for this iterator's process.

       "handle_unicode"

       Upgrade the input stream to handle UTF8.

       "get_select_handles"

       Return a list of filehandles that may be used upstream in a select()
       call to signal that this Iterator is ready. Iterators that are not
       handle based should return an empty list.

## ATTRIBUTION
       Originally ripped off from [Test::Harness](https://www.chedong.com/phpMan.php/perldoc/Test%3A%3AHarness/markdown).

## SEE ALSO
       [TAP::Object](https://www.chedong.com/phpMan.php/perldoc/TAP%3A%3AObject/markdown), [TAP::Parser](https://www.chedong.com/phpMan.php/perldoc/TAP%3A%3AParser/markdown), [TAP::Parser::Iterator](https://www.chedong.com/phpMan.php/perldoc/TAP%3A%3AParser%3A%3AIterator/markdown),

perl v5.34.0                      2026-[06TAP::Parser::Iterator](https://www.chedong.com/phpMan.php/perldoc/06TAP%3A%3AParser%3A%3AIterator/markdown)::[Process(3perl)](https://www.chedong.com/phpMan.php/man/Process/3perl/markdown)