Commit | Line | Data |
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e1a479c5 BB |
1 | #!/usr/bin/perl |
2 | ||
3 | use strict; | |
4 | use warnings; | |
5 | ||
c94dd5be | 6 | require q(./test.pl); plan(tests => 5); |
e1a479c5 BB |
7 | |
8 | =pod | |
9 | ||
93f09d7b | 10 | This tests the classic diamond inheritance pattern. |
e1a479c5 BB |
11 | |
12 | <A> | |
13 | / \ | |
14 | <B> <C> | |
15 | \ / | |
16 | <D> | |
17 | ||
18 | =cut | |
19 | ||
20 | { | |
21 | package Diamond_A; | |
22 | use mro 'c3'; | |
23 | sub hello { 'Diamond_A::hello' } | |
24 | sub foo { 'Diamond_A::foo' } | |
25 | } | |
26 | { | |
27 | package Diamond_B; | |
28 | use base 'Diamond_A'; | |
29 | use mro 'c3'; | |
30 | sub foo { 'Diamond_B::foo => ' . (shift)->next::method() } | |
31 | } | |
32 | { | |
33 | package Diamond_C; | |
34 | use mro 'c3'; | |
35 | use base 'Diamond_A'; | |
36 | ||
37 | sub hello { 'Diamond_C::hello => ' . (shift)->next::method() } | |
38 | sub foo { 'Diamond_C::foo => ' . (shift)->next::method() } | |
39 | } | |
40 | { | |
41 | package Diamond_D; | |
42 | use base ('Diamond_B', 'Diamond_C'); | |
43 | use mro 'c3'; | |
44 | ||
45 | sub foo { 'Diamond_D::foo => ' . (shift)->next::method() } | |
46 | } | |
47 | ||
c94dd5be | 48 | ok(eq_array( |
e1a479c5 | 49 | mro::get_linear_isa('Diamond_D'), |
c94dd5be RGS |
50 | [ qw(Diamond_D Diamond_B Diamond_C Diamond_A) ] |
51 | ), '... got the right MRO for Diamond_D'); | |
e1a479c5 BB |
52 | |
53 | is(Diamond_D->hello, 'Diamond_C::hello => Diamond_A::hello', '... method resolved itself as expected'); | |
54 | ||
55 | is(Diamond_D->can('hello')->('Diamond_D'), | |
56 | 'Diamond_C::hello => Diamond_A::hello', | |
57 | '... can(method) resolved itself as expected'); | |
58 | ||
59 | is(UNIVERSAL::can("Diamond_D", 'hello')->('Diamond_D'), | |
60 | 'Diamond_C::hello => Diamond_A::hello', | |
61 | '... can(method) resolved itself as expected'); | |
62 | ||
63 | is(Diamond_D->foo, | |
64 | 'Diamond_D::foo => Diamond_B::foo => Diamond_C::foo => Diamond_A::foo', | |
65 | '... method foo resolved itself as expected'); |