--- /dev/null
+#!/usr/bin/perl
+
+use strict;
+use warnings;
+
+use Test::More tests => 7;
+
+BEGIN {
+ use_ok('Class::C3::XS');
+}
+
+=pod
+
+This example is take from: http://www.python.org/2.3/mro.html
+
+"My first example"
+class O: pass
+class F(O): pass
+class E(O): pass
+class D(O): pass
+class C(D,F): pass
+class B(D,E): pass
+class A(B,C): pass
+
+
+ 6
+ ---
+Level 3 | O | (more general)
+ / --- \
+ / | \ |
+ / | \ |
+ / | \ |
+ --- --- --- |
+Level 2 3 | D | 4| E | | F | 5 |
+ --- --- --- |
+ \ \ _ / | |
+ \ / \ _ | |
+ \ / \ | |
+ --- --- |
+Level 1 1 | B | | C | 2 |
+ --- --- |
+ \ / |
+ \ / \ /
+ ---
+Level 0 0 | A | (more specialized)
+ ---
+
+=cut
+
+{
+ package Test::O;
+ our @ISA = qw//;
+
+ package Test::F;
+ use base 'Test::O';
+
+ package Test::E;
+ use base 'Test::O';
+
+ package Test::D;
+ use base 'Test::O';
+
+ package Test::C;
+ use base ('Test::D', 'Test::F');
+
+ package Test::B;
+ use base ('Test::D', 'Test::E');
+
+ package Test::A;
+ use base ('Test::B', 'Test::C');
+}
+
+is_deeply(
+ [ Class::C3::XS::calculateMRO('Test::F') ],
+ [ qw(Test::F Test::O) ],
+ '... got the right MRO for Test::F');
+
+is_deeply(
+ [ Class::C3::XS::calculateMRO('Test::E') ],
+ [ qw(Test::E Test::O) ],
+ '... got the right MRO for Test::E');
+
+is_deeply(
+ [ Class::C3::XS::calculateMRO('Test::D') ],
+ [ qw(Test::D Test::O) ],
+ '... got the right MRO for Test::D');
+
+is_deeply(
+ [ Class::C3::XS::calculateMRO('Test::C') ],
+ [ qw(Test::C Test::D Test::F Test::O) ],
+ '... got the right MRO for Test::C');
+
+is_deeply(
+ [ Class::C3::XS::calculateMRO('Test::B') ],
+ [ qw(Test::B Test::D Test::E Test::O) ],
+ '... got the right MRO for Test::B');
+
+is_deeply(
+ [ Class::C3::XS::calculateMRO('Test::A') ],
+ [ qw(Test::A Test::B Test::C Test::D Test::E Test::F Test::O) ],
+ '... got the right MRO for Test::A');
+