TAP::Parser::SourceHandler::Perl

Section: Perl Programmers Reference Guide (3perl)
Updated: 2019-04-20
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NAME

TAP::Parser::SourceHandler::Perl - Stream TAP from a Perl executable

VERSION

Version 3.42

SYNOPSIS

  use TAP::Parser::Source;
  use TAP::Parser::SourceHandler::Perl;

  my $source = TAP::Parser::Source->new->raw( \'script.pl' );
  $source->assemble_meta;

  my $class = 'TAP::Parser::SourceHandler::Perl';
  my $vote  = $class->can_handle( $source );
  my $iter  = $class->make_iterator( $source );

DESCRIPTION

This is a Perl TAP::Parser::SourceHandler - it has 2 jobs:

1. Figure out if the TAP::Parser::Source it's given is actually a Perl script (``can_handle'').

2. Creates an iterator for Perl sources (``make_iterator'').

Unless you're writing a plugin or subclassing TAP::Parser, you probably won't need to use this module directly.

METHODS

Class Methods

"can_handle"

  my $vote = $class->can_handle( $source );

Only votes if $source looks like a file. Casts the following votes:

  0.9  if it has a shebang ala "#!...perl"
  0.75 if it has any shebang
  0.8  if it's a .t file
  0.9  if it's a .pl file
  0.75 if it's in a 't' directory
  0.25 by default (backwards compat)

"make_iterator"

  my $iterator = $class->make_iterator( $source );

Constructs & returns a new TAP::Parser::Iterator::Process for the source. Assumes "$source->raw" contains a reference to the perl script. "croak"s if the file could not be found.

The command to run is built as follows:

  $perl @switches $perl_script @test_args

The perl command to use is determined by ``get_perl''. The command generated is guaranteed to preserve:

  PERL5LIB
  PERL5OPT
  Taint Mode, if set in the script's shebang

Note: the command generated will not respect any shebang line defined in your Perl script. This is only a problem if you have compiled a custom version of Perl or if you want to use a specific version of Perl for one test and a different version for another, for example:

  #!/path/to/a/custom_perl --some --args
  #!/usr/local/perl-5.6/bin/perl -w

Currently you need to write a plugin to get around this.

"get_taint"

Decode any taint switches from a Perl shebang line.

  # $taint will be 't'
  my $taint = TAP::Parser::SourceHandler::Perl->get_taint( '#!/usr/bin/perl -t' );

  # $untaint will be undefined
  my $untaint = TAP::Parser::SourceHandler::Perl->get_taint( '#!/usr/bin/perl' );

"get_perl"

Gets the version of Perl currently running the test suite.

SUBCLASSING

Please see ``SUBCLASSING'' in TAP::Parser for a subclassing overview.

Example

  package MyPerlSourceHandler;

  use strict;

  use TAP::Parser::SourceHandler::Perl;

  use base 'TAP::Parser::SourceHandler::Perl';

  # use the version of perl from the shebang line in the test file
  sub get_perl {
      my $self = shift;
      if (my $shebang = $self->shebang( $self->{file} )) {
          $shebang =~ /^#!(.*\bperl.*?)(?:(?:\s)|(?:$))/;
          return $1 if $1;
      }
      return $self->SUPER::get_perl(@_);
  }