branch-1-6/t/lib/Test/Harness/Iterator.pm

   1 package Test::Harness::Iterator;
   2
   3 use strict;
   4 use vars qw($VERSION);
   5 $VERSION = 0.02;
   6
   7 =head1 NAME
   8
   9 Test::Harness::Iterator - Internal Test::Harness Iterator
  10
  11 =head1 SYNOPSIS
  12
  13   use Test::Harness::Iterator;
  14   my $it = Test::Harness::Iterator->new(\*TEST);
  15   my $it = Test::Harness::Iterator->new(\@array);
  16
  17   my $line = $it->next;
  18
  19 =head1 DESCRIPTION
  20
  21 B<FOR INTERNAL USE ONLY!>
  22
  23 This is a simple iterator wrapper for arrays and filehandles.
  24
  25 =head2 new()
  26
  27 Create an iterator.
  28
  29 =head2 next()
  30
  31 Iterate through it, of course.
  32
  33 =cut
  34
  35 sub new {
  36     my($proto, $thing) = @_;
  37
  38     my $self = {};
  39     if( ref $thing eq 'GLOB' ) {
  40         bless $self, 'Test::Harness::Iterator::FH';
  41         $self->{fh} = $thing;
  42     }
  43     elsif( ref $thing eq 'ARRAY' ) {
  44         bless $self, 'Test::Harness::Iterator::ARRAY';
  45         $self->{idx}   = 0;
  46         $self->{array} = $thing;
  47     }
  48     else {
  49         warn "Can't iterate with a ", ref $thing;
  50     }
  51
  52     return $self;
  53 }
  54
  55 package Test::Harness::Iterator::FH;
  56 sub next {
  57     my $fh = $_[0]->{fh};
  58
  59     # readline() doesn't work so good on 5.5.4.
  60     return scalar <$fh>;
  61 }
  62
  63
  64 package Test::Harness::Iterator::ARRAY;
  65 sub next {
  66     my $self = shift;
  67     return $self->{array}->[$self->{idx}++];
  68 }
  69
  70 "Steve Peters, Master Of True Value Finding, was here.";