1# This is a replacement for the old BEGIN preamble which heads (or 2# should head) up every core test program to prepare it for running: 3# 4# BEGIN { 5# chdir 't' if -d 't'; 6# @INC = '../lib'; 7# } 8# 9# Its primary purpose is to clear @INC so core tests don't pick up 10# modules from an installed Perl. 11# 12# t/TEST and t/harness will invoke each test script with 13# perl -I. -MTestInit[=arg,arg,..] some/test.t 14# You may "use TestInit" in the test # programs but it is not required. 15# 16# TestInit will completely empty the current @INC and replace it with 17# new entries based on the args: 18# 19# U2T: adds ../../lib and ../../t; 20# U1: adds ../lib; 21# T: adds lib and chdir's to the top-level directory. 22# 23# In the absence of any of the above options, it chdir's to 24# t/ or cpan/Foo-Bar/ etc as appropriate and correspondingly 25# sets @INC to (../lib) or ( ../../lib, ../../t) 26# 27# In addition, 28# 29# A: converts any added @INC entries to absolute paths; 30# NC: unsets $ENV{PERL_CORE}; 31# DOT: unconditionally appends '.' to @INC. 32# 33# Any trailing '.' in @INC present on entry will be preserved. 34# 35# P.S. This documentation is not in POD format in order to avoid 36# problems when there are fundamental bugs in perl. 37 38package TestInit; 39 40$VERSION = 1.04; 41 42# Let tests know they're running in the perl core. Useful for modules 43# which live dual lives on CPAN. 44# Don't interfere with the taintedness of %ENV, this could perturbate tests. 45# This feels like a better solution than the original, from 46# Message-ID: 20030703145818.5bdd2873.rgarciasuarez@free.fr 47# https://www.nntp.perl.org/group/perl.perl5.porters/2003/07/msg77533.html 48$ENV{PERL_CORE} = $^X; 49 50$0 =~ s/\.dp$//; # for the test.deparse make target 51 52my $add_dot = (@INC && $INC[-1] eq '.'); # preserve existing, 53 54sub import { 55 my $self = shift; 56 my @up_2_t = ('../../lib', '../../t'); 57 my ($abs, $chdir, $setopt); 58 foreach (@_) { 59 if ($_ eq 'U2T') { 60 @INC = @up_2_t; 61 $setopt = 1; 62 } elsif ($_ eq 'U1') { 63 @INC = '../lib'; 64 $setopt = 1; 65 } elsif ($_ eq 'NC') { 66 delete $ENV{PERL_CORE} 67 } elsif ($_ eq 'A') { 68 $abs = 1; 69 } elsif ($_ eq 'T') { 70 $chdir = '..' 71 unless -f 't/TEST' && -f 'MANIFEST' && -d 'lib' && -d 'ext'; 72 @INC = 'lib'; 73 $setopt = 1; 74 } elsif ($_ eq 'DOT') { 75 $add_dot = 1; 76 } else { 77 die "Unknown option '$_'"; 78 } 79 } 80 81 # Need to default. This behaviour is consistent with previous behaviour, 82 # as the equivalent of this code used to be run at the top level, hence 83 # would happen (unconditionally) before import() was called. 84 unless ($setopt) { 85 if (-f 't/TEST' && -f 'MANIFEST' && -d 'lib' && -d 'ext') { 86 # We're being run from the top level. Try to change directory, and 87 # set things up correctly. This is a 90% solution, but for 88 # hand-running tests, that's good enough 89 if ($0 =~ s!^((?:ext|dist|cpan)[\\/][^\\/]+)[\\/](.*\.t)$!$2!) { 90 # Looks like a test in ext. 91 $chdir = $1; 92 @INC = @up_2_t; 93 $setopt = 1; 94 $^X =~ s!^\.([\\/])!..$1..$1!; 95 } else { 96 $chdir = 't'; 97 @INC = '../lib'; 98 $setopt = $0 =~ m!^lib/!; 99 } 100 } else { 101 # (likely) we're being run by t/TEST or t/harness, and we're a test 102 # in t/ 103 if (defined &DynaLoader::boot_DynaLoader) { 104 @INC = '../lib'; 105 } 106 else { 107 # miniperl/minitest 108 # t/TEST does not supply -I../lib, so buildcustomize.pl is 109 # not automatically included. 110 unshift @INC, '../lib'; 111 do "../lib/buildcustomize.pl"; 112 } 113 } 114 } 115 116 if (defined $chdir) { 117 chdir $chdir or die "Can't chdir '$chdir': $!"; 118 } 119 120 if ($abs) { 121 require File::Spec::Functions; 122 # Forcibly untaint this. 123 @INC = map { $_ = File::Spec::Functions::rel2abs($_); /(.*)/; $1 } @INC; 124 $^X = File::Spec::Functions::rel2abs($^X); 125 } 126 127 if ($setopt) { 128 my $sep; 129 if ($^O eq 'VMS') { 130 $sep = '|'; 131 } elsif ($^O eq 'MSWin32') { 132 $sep = ';'; 133 } else { 134 $sep = ':'; 135 } 136 137 my $lib = join $sep, @INC; 138 if (exists $ENV{PERL5LIB}) { 139 $ENV{PERL5LIB} = $lib . substr $ENV{PERL5LIB}, 0, 0; 140 } else { 141 $ENV{PERL5LIB} = $lib; 142 } 143 } 144 145 push @INC, '.' if $add_dot; 146} 147 1481; 149