--- /dev/null
+#!/usr/bin/env perl
+use strict;
+use warnings;
+use Test::More tests => 7;
+use Test::Exception;
+
+do {
+ package Person;
+ use Moose;
+ use MooseX::IsDefaults::RO;
+
+ has name => (
+ isa => 'Str',
+ );
+
+ has birth_year => (
+ isa => 'Int',
+ );
+
+ has favorite_language => (
+ is => 'rw',
+ isa => 'Str',
+ default => 'Perl',
+ );
+};
+
+can_ok(Person => qw(name birth_year favorite_language));
+
+my $whacko = Person->new(name => 'Stevan', birth_year => 1924);
+is($whacko->name, 'Stevan');
+is($whacko->birth_year, 1924);
+is($whacko->favorite_language, 'Perl');
+
+throws_ok {
+ $whacko->name('Stevan Little');
+} qr/read-only accessor/;
+
+throws_ok {
+ $whacko->birth_year(1922);
+} qr/read-only accessor/;
+
+$whacko->favorite_language('C#'); # he's dead to us now..
+is($whacko->favorite_language, 'C#');
+