The Official name of ASCII.

[perl5.git] / lib / open.t

#!./perl

BEGIN {
	chdir 't' if -d 't';
	@INC = '../lib';
}

use Test::More tests => 13;

# open::import expects 'open' as its first argument, but it clashes with open()
sub import {
	open::import( 'open', @_ );
}

# can't use require_ok() here, with a name like 'open'
ok( require 'open.pm', 'requiring open' );

# this should fail
eval { import() };
like( $@, qr/needs explicit list of disciplines/, 
	'import should fail without args' );

# the hint bits shouldn't be set yet
is( $^H & $open::hint_bits, 0, 
	'hint bits should not be set in $^H before open import' );

# prevent it from loading I18N::Langinfo, so we can test encoding failures
local @INC;
$ENV{LC_ALL} = $ENV{LANG} = '';
eval { import( 'IN', 'locale' ) };
like( $@, qr/Cannot figure out an encoding/, 
	'no encoding should be found without $ENV{LANG} or $ENV{LC_ALL}' );

my $warn;
local $SIG{__WARN__} = sub {
	$warn .= shift;
};

# and it shouldn't be able to find this discipline
eval{ import( 'IN', 'macguffin' ) };
like( $warn, qr/Unknown discipline layer/, 
	'should warn about unknown discipline with bad discipline provided' );

# now load a real-looking locale
$ENV{LC_ALL} = ' .utf8';
import( 'IN', 'locale' );
is( ${^OPEN}, ":utf8\0", 
	'should set a valid locale layer' );

# and see if it sets the magic variables appropriately
import( 'IN', ':crlf' );
ok( $^H & $open::hint_bits, 
	'hint bits should be set in $^H after open import' );
is( $^H{'open_IN'}, 'crlf', 'should have set crlf layer' );

# it should reset them appropriately, too
import( 'IN', ':raw' );
is( $^H{'open_IN'}, 'raw', 'should have reset to raw layer' );

# it dies if you don't set IN, OUT, or IO
eval { import( 'sideways', ':raw' ) };
like( $@, qr/Unknown discipline class/, 'should croak with unknown class' );

# but it handles them all so well together
import( 'IO', ':raw :crlf' );
is( ${^OPEN}, ":raw :crlf\0:raw :crlf",
	'should set multi types, multi disciplines' );
is( $^H{'open_IO'}, 'crlf', 'should record last layer set in %^H' );

# the special :utf8 layer
use open ':utf8';
open(O, ">utf8");
print O chr(0x100);
close O;
open(I, "<utf8");
is(ord(<I>), 0x100, ":utf8");
close I;

# the test cases beyond __DATA__ need to be executed separately

__DATA__
$ENV{LC_ALL} = 'nonexistent.euc';
eval { open::_get_locale_encoding() };
like( $@, qr/too ambiguous/, 'should die with ambiguous locale encoding' );
%%%
# the special :locale layer
$ENV{LANG} = 'ru_RU.KOI8-R';
# the :locale will probe the locale environment variables like LANG
use open OUT => ':locale';
open(O, ">koi8");
print O chr(0x430); # Unicode CYRILLIC SMALL LETTER A = KOI8-R 0xC1
close O;
open(I, "<koi8");
printf "%#X\n", ord(<I>), "\n"; # this should print 0xC1
close I;
%%%