--- /dev/null
+#!/usr/bin/env perl
+use strict;
+use warnings;
+use Test::More tests => 9;
+
+do {
+ package Class;
+ use Mouse;
+
+ has 'x' => (
+ is => 'rw',
+ default => sub { 10 },
+ );
+
+ has 'y' => (
+ is => 'rw',
+ default => sub { 20 },
+ );
+
+ has 'z' => (
+ is => 'rw',
+ );
+};
+
+my $object = Class->new;
+is($object->x, 10, "attribute has a default of 10");
+is($object->y, 20, "attribute has a default of 20");
+is($object->z, undef, "attribute has no default");
+
+is($object->x(5), 5, "setting a new value");
+is($object->y(25), 25, "setting a new value");
+is($object->z(125), 125, "setting a new value");
+
+is($object->x, 5, "setting a new value does not trigger default");
+is($object->y, 25, "setting a new value does not trigger default");
+is($object->z, 125, "setting a new value does not trigger default");
+