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|
#!/usr/bin/perl
use strict;
use warnings;
no warnings 'redefine';
#use Test::More tests => 33;
use Test::More qw/no_plan/;
use Class::Trait;
sub clean_inc {
my @packages = qw(
Circle
Extra::TSpouse
Foo
Polygamy
TBomb
TDisallowed
TSpouse
TestTraits
);
foreach my $package (@packages) {
no strict 'refs';
clean_package( $package, keys %{"${package}::"} );
}
my @includes = map { s{::}{/}g; "$_.pm" } @packages;
delete @INC{@includes};
eval <<' END_FOO';
package Foo;
sub new { bless {}, shift }
sub name { 'Foo' }
sub explode { 'Foo explodes' }
}
END_FOO
}
sub clean_package {
my ( $package, @globs ) = @_;
no strict 'refs';
foreach my $glob (@globs) {
undef *{"${package}::$glob"};
}
Class::Trait::_clear_all_caches();
Class::Trait::_clear_does_cache(); # internal testing hook
no warnings 'once';
undef $Foo::TRAITS;
}
local $SIG{__WARN__} = sub {
my $message = shift;
return if $message =~ /Too late to run INIT block/;
warn $message;
};
BEGIN {
chdir 't' if -d 't';
unshift @INC => ( '../lib', 'test_lib' );
}
#
# appling simple runtime traits to instances
#
clean_inc();
Class::Trait->apply(Foo => 'TSpouse');
my $foo = Foo->new;
isa_ok $foo, 'Foo', '... and the object it returns';
can_ok 'Foo', 'does';
ok +Foo->does('TSpouse'), '... and it should be able to do the new trait';
can_ok $foo, 'name';
is $foo->name, 'Foo', '... original methods should still be available';
can_ok $foo, 'explode';
is $foo->explode, 'Spouse explodes',
'... but corresponding trait methods should override them';
can_ok $foo, 'fuse';
is $foo->fuse, 'Spouse fuse',
'... and the new trait methods should be available';
my $foo2 = Foo->new;
is $foo2->explode, 'Spouse explodes',
'Different instances of classes should share runtime traits applied to classes';
#
# conflicting runtime traits to instances
#
clean_inc();
can_ok 'Class::Trait', 'apply';
eval { Class::Trait->apply( 'Foo', 'TSpouse', 'TBomb' ) };
ok $@, 'Trying to apply conflicting traits at runtime should fail';
like $@, qr/Package (?:\w|::)+ has conflicting methods \(.*\)/,
'... with an appropriate error message';
# let's resolve those conflicts
clean_inc();
Class::Trait->apply(
'Foo',
TSpouse => { exclude => 'fuse' },
TBomb => { exclude => 'explode' },
);
$foo = Foo->new;
ok $foo->does('TSpouse'), '... and it should be able to do the first trait';
ok $foo->does('TBomb'), '... and it should be able to do the second trait';
can_ok $foo, 'name';
is $foo->name, 'Foo', '... original methods should still be available';
can_ok $foo, 'explode';
is $foo->explode, 'Spouse explodes',
'... but corresponding trait methods should override them';
can_ok $foo, 'fuse';
is $foo->fuse, 'Bomb fuse', '... and the new trait methods should be available';
#
# let's apply the traits separately
#
clean_inc();
Class::Trait->apply( Foo => 'TSpouse' );
$foo = Foo->new;
ok !$foo->does('TBomb'),
'Trait information should not persist innappropriately';
Class::Trait->apply( Foo => 'TBomb' );
ok $foo->does('TBomb'), '... but we should have that info when it is available';
ok $foo->does('TSpouse'),
'... and it should still report the other traits it can do';
can_ok $foo, 'name';
is $foo->name, 'Foo', '... original methods should still be available';
can_ok $foo, 'explode';
is $foo->explode, 'Bomb explodes',
'... but later trait methods should override earlier ones';
can_ok $foo, 'fuse';
is $foo->fuse, 'Bomb fuse', '... and the new trait methods should be available';
my @does = sort $foo->does;
is_deeply \@does, [qw/TBomb TSpouse/],
'... and it should be able to report all traits it can do';
#
# let's apply runtime composite traits with requirements
#
clean_inc();
eval { Class::Trait->apply(Foo => 'Extra::TSpouse') };
ok $@, 'Trying to apply a runtime trait with unmet requirements should fail';
like $@, qr/Requirement \(alimony\) for Extra::TSpouse not in Foo/,
'... with an appropriate error message';
clean_inc();
{
no warnings 'once';
*Foo::alimony = sub { 'Foo alimony' };
}
eval { Class::Trait->apply(Foo => 'Extra::TSpouse') };
ok $@, 'Trying to apply a runtime trait with unmet requirements should fail';
like $@, qr/Requirement \(lawyer\) for Extra::TSpouse not in Foo/,
'... with an appropriate error message';
clean_inc();
{
no warnings 'once';
*Foo::alimony = sub { 'Foo alimony' };
*Foo::lawyer = sub { 'Foo lawyer' };
}
ok +Class::Trait->apply(Foo => 'Extra::TSpouse'),
'Satisfying all requirements of runtime traits should succeed';
is $foo->explode, 'Extra spouse explodes',
'... and the correct method should be overridden';
|
