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1 | #!/usr/bin/perl |
2 | |
3 | use strict; |
4 | use warnings; |
5 | |
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6 | require q(./test.pl); plan(tests => 5); |
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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 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 | |
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48 | ok(eq_array( |
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49 | mro::get_linear_isa('Diamond_D'), |
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50 | [ qw(Diamond_D Diamond_B Diamond_C Diamond_A) ] |
51 | ), '... got the right MRO for Diamond_D'); |
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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'); |