```{index} single: TAP::Parser::Iterator::Process ``` # TAP::Parser::Iterator::Process Iterator for process-based TAP sources ## VERSION Version 3.52 ## SYNOPSIS ```perl use TAP::Parser::Iterator::Process; my %args = ( command => ['python', 'setup.py', 'test'], merge => 1, setup => sub { ... }, teardown => sub { ... }, ); my $it = TAP::Parser::Iterator::Process->new(\%args); my $line = $it->next; ``` ## DESCRIPTION This is a simple iterator wrapper for executing external processes, used by [TAP::Parser](../../Parser.md). 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: ```perl 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](../../../IPC/Open3.md) & [IO::Select](../../../IO/Select.md) 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](../../../Test/Harness.md). ## SEE ALSO [TAP::Object](../../Object.md), [TAP::Parser](../../Parser.md), [TAP::Parser::Iterator](../Iterator.md),