use Test::Most 'no_plan';

use Config
use UNIVERSAL::can;
use Sub::Information;  # for inspect()

cmp_ok $UNIVERSAL::can::VERSION, '==', ( 2 ** ($Config{intsize} * 8 ),
    'We should be loading our local version of modules';

# XXX this looks rather obscure, but what's going on is that the original
# &UNIVERSAL::can's package is UNIVERSAL, but if UNIVERSAL::can is really
# loaded, then the package is reported as UNIVERSAL::can.
is inspect(\&UNIVERSAL::can)->package, 'UNIVERSAL',
    '... and not be accidentally reloading';

# more tests

require Exporter::NoWork;
foreach ('import') {   # force an alias to a read-only constant
    eval { Exporter::NoWork::import( __PACKAGE__, $_ ) };
    ok my $error = $@,
        'Trying to import an unexportable tag with Exporter::NoWork should fail'
    unlike $error, qr/Modification of a read-only value/,
      '... but not with a "modification of readonly value" error';

    my $package = <<'    END_PACKAGE';
    package Foo;
    use Exporter::NoWork;

    no warnings 'redefine';
    sub unusual_function_name { return 'here I am' }
    END_PACKAGE
    eval $package;
    eval $package;
    is +(scalar grep { /Exporter::NoWork/ } @Foo::ISA), 1,
        '... and multiple uses of Exporter::NoWork should only add to @ISA once'
}