use v5.14;
use Test::More;

package Foo
{
	use Moose;
	has foo => (
		traits  => ['MooseX::IgnoreFalse::Trait::Attribute'],
		is      => 'ro',
		default => 'whatever',
	);
}

is(Foo->new(foo => 'xyz')->foo, 'xyz');
is(Foo->new(foo => '0')->foo,   'whatever');
is(Foo->new(foo => '')->foo,    'whatever');
is(Foo->new(foo => undef)->foo, 'whatever');

done_testing;