undef.t revision 7c478bd95313f5f23a4c958a745db2134aa03244
#!/usr/bin/perl -w
BEGIN {
if( $ENV{PERL_CORE} ) {
chdir 't';
@INC = ('../lib', 'lib');
}
else {
unshift @INC, 't/lib';
}
}
use strict;
use Test::More tests => 14;
use TieOut;
BEGIN { $^W = 1; }
my $warnings = '';
local $SIG{__WARN__} = sub { $warnings .= join '', @_ };
is( undef, undef, 'undef is undef');
is( $warnings, '', ' no warnings' );
isnt( undef, 'foo', 'undef isnt foo');
is( $warnings, '', ' no warnings' );
isnt( undef, '', 'undef isnt an empty string' );
isnt( undef, 0, 'undef isnt zero' );
like( undef, '/.*/', 'undef is like anything' );
is( $warnings, '', ' no warnings' );
eq_array( [undef, undef], [undef, 23] );
is( $warnings, '', 'eq_array() no warnings' );
eq_hash ( { foo => undef, bar => undef },
{ foo => undef, bar => 23 } );
is( $warnings, '', 'eq_hash() no warnings' );
eq_set ( [undef, undef, 12], [29, undef, undef] );
is( $warnings, '', 'eq_set() no warnings' );
eq_hash ( { foo => undef, bar => { baz => undef, moo => 23 } },
{ foo => undef, bar => { baz => undef, moo => 23 } } );
is( $warnings, '', 'eq_hash() no warnings' );
my $tb = Test::More->builder;
use TieOut;
my $caught = tie *CATCH, 'TieOut';
my $old_fail = $tb->failure_output;
$tb->failure_output(\*CATCH);
diag(undef);
$tb->failure_output($old_fail);
is( $caught->read, "# undef\n" );
is( $warnings, '', 'diag(undef) no warnings' );