source: vendor/perl/5.8.8/lib/Config.t@ 3951

#!./perl -w

BEGIN {
    chdir 't' if -d 't';
    @INC = '../lib';
    require "./test.pl";

    plan ('no_plan');

    use_ok('Config');
}

use strict;

# Some (safe?) bets.

ok(keys %Config > 500, "Config has more than 500 entries");

my ($first) = Config::config_sh() =~ /^(\S+)=/m;
die "Can't find first entry in Config::config_sh()" unless defined $first;
print "# First entry is '$first'\n";

# It happens that the we know what the first key should be. This is somewhat
# cheating, but there was briefly a bug where the key got a bonus newline.
my ($first_each) = each %Config;
is($first_each, $first, "First key from each is correct");
ok(exists($Config{$first_each}), "First key exists");
ok(!exists($Config{"\n$first"}),
   "Check that first key with prepended newline isn't falsely existing");

is($Config{PERL_REVISION}, 5, "PERL_REVISION is 5");

# Check that old config variable names are aliased to their new ones.
my %grandfathers = ( PERL_VERSION       => 'PATCHLEVEL',
                     PERL_SUBVERSION    => 'SUBVERSION',
                     PERL_CONFIG_SH     => 'CONFIG'
                   );
while( my($new, $old) = each %grandfathers ) {
    isnt($Config{$new}, undef,       "$new is defined");
    is($Config{$new}, $Config{$old}, "$new is aliased to $old");
}

ok( exists $Config{cc},      "has cc");

ok( exists $Config{ccflags}, "has ccflags");

ok(!exists $Config{python},  "has no python");

ok( exists $Config{d_fork},  "has d_fork");

ok(!exists $Config{d_bork},  "has no d_bork");

like($Config{ivsize}, qr/^(4|8)$/, "ivsize is 4 or 8 (it is $Config{ivsize})");

# byteorder is virtual, but it has rules.

like($Config{byteorder}, qr/^(1234|4321|12345678|87654321)$/,
     "byteorder is 1234 or 4321 or 12345678 or 87654321 "
     . "(it is $Config{byteorder})");

is(length $Config{byteorder}, $Config{ivsize},
   "byteorder is as long as ivsize (which is $Config{ivsize})");

# ccflags_nolargefiles is virtual, too.

ok(exists $Config{ccflags_nolargefiles}, "has ccflags_nolargefiles");

# Utility functions.

{
    # make sure we can export what we say we can export.
    package Foo;
    my @exports = qw(myconfig config_sh config_vars config_re);
    Config->import(@exports);
    foreach my $func (@exports) {
        ::ok( __PACKAGE__->can($func), "$func exported" );
    }
}

like(Config::myconfig(), qr/osname=\Q$Config{osname}\E/,   "myconfig");
like(Config::config_sh(), qr/osname='\Q$Config{osname}\E'/, "config_sh");
like(Config::config_sh(), qr/byteorder='[1-8]+'/,
     "config_sh has a valid byteorder");
foreach my $line (Config::config_re('c.*')) {
  like($line,                  qr/^c.*?=.*$/,                   'config_re' );
}

my $out = tie *STDOUT, 'FakeOut';

Config::config_vars('cc');      # non-regex test of essential cfg-var
my $out1 = $$out;
$out->clear;

Config::config_vars('d_bork');  # non-regex, non-existent cfg-var
my $out2 = $$out;
$out->clear;

Config::config_vars('PERL_API_.*');     # regex, tagged multi-line answer
my $out3 = $$out;
$out->clear;

Config::config_vars('PERL_API_.*:');    # regex, tagged single-line answer
my $out4 = $$out;
$out->clear;

Config::config_vars(':PERL_API_.*:');   # regex, non-tagged single-line answer
my $out5 = $$out;
$out->clear;

Config::config_vars(':PERL_API_.*');    # regex, non-tagged multi-line answer
my $out6 = $$out;
$out->clear;

Config::config_vars('PERL_API_REVISION.*:'); # regex, tagged 
my $out7 = $$out;
$out->clear;

# regex, non-tagged multi-line answer
Config::config_vars(':PERL_API_REVISION.*');
my $out8 = $$out;