Commit | Line | Data |
e1a479c5 |
1 | #!/usr/bin/perl |
2 | |
3 | use strict; |
4 | use warnings; |
5 | |
6 | use Test::More tests => 10; |
7 | |
8 | =pod |
9 | |
10 | This tests the classic diamond inheritence pattern. |
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 bar { 'Diamond_A::bar' } |
24 | sub baz { 'Diamond_A::baz' } |
25 | } |
26 | { |
27 | package Diamond_B; |
28 | use base 'Diamond_A'; |
29 | use mro 'c3'; |
30 | sub baz { 'Diamond_B::baz => ' . (shift)->next::method() } |
31 | } |
32 | { |
33 | package Diamond_C; |
34 | use mro 'c3'; |
35 | use base 'Diamond_A'; |
36 | sub foo { 'Diamond_C::foo' } |
37 | sub buz { 'Diamond_C::buz' } |
38 | |
39 | sub woz { 'Diamond_C::woz' } |
40 | sub maybe { 'Diamond_C::maybe' } |
41 | } |
42 | { |
43 | package Diamond_D; |
44 | use base ('Diamond_B', 'Diamond_C'); |
45 | use mro 'c3'; |
46 | sub foo { 'Diamond_D::foo => ' . (shift)->next::method() } |
47 | sub bar { 'Diamond_D::bar => ' . (shift)->next::method() } |
48 | sub buz { 'Diamond_D::buz => ' . (shift)->baz() } |
49 | sub fuz { 'Diamond_D::fuz => ' . (shift)->next::method() } |
50 | |
51 | sub woz { 'Diamond_D::woz can => ' . ((shift)->next::can() ? 1 : 0) } |
52 | sub noz { 'Diamond_D::noz can => ' . ((shift)->next::can() ? 1 : 0) } |
53 | |
54 | sub maybe { 'Diamond_D::maybe => ' . ((shift)->maybe::next::method() || 0) } |
55 | sub moybe { 'Diamond_D::moybe => ' . ((shift)->maybe::next::method() || 0) } |
56 | |
57 | } |
58 | |
59 | is_deeply( |
60 | mro::get_linear_isa('Diamond_D'), |
61 | [ qw(Diamond_D Diamond_B Diamond_C Diamond_A) ], |
62 | '... got the right MRO for Diamond_D'); |
63 | |
64 | is(Diamond_D->foo, 'Diamond_D::foo => Diamond_C::foo', '... skipped B and went to C correctly'); |
65 | is(Diamond_D->bar, 'Diamond_D::bar => Diamond_A::bar', '... skipped B & C and went to A correctly'); |
66 | is(Diamond_D->baz, 'Diamond_B::baz => Diamond_A::baz', '... called B method, skipped C and went to A correctly'); |
67 | is(Diamond_D->buz, 'Diamond_D::buz => Diamond_B::baz => Diamond_A::baz', '... called D method dispatched to , different method correctly'); |
68 | eval { Diamond_D->fuz }; |
69 | like($@, qr/^No next::method 'fuz' found for Diamond_D/, '... cannot re-dispatch to a method which is not there'); |
70 | |
71 | is(Diamond_D->woz, 'Diamond_D::woz can => 1', '... can re-dispatch figured out correctly'); |
72 | is(Diamond_D->noz, 'Diamond_D::noz can => 0', '... cannot re-dispatch figured out correctly'); |
73 | |
74 | is(Diamond_D->maybe, 'Diamond_D::maybe => Diamond_C::maybe', '... redispatched D to C when it exists'); |
75 | is(Diamond_D->moybe, 'Diamond_D::moybe => 0', '... quietly failed redispatch from D'); |