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1 | #!./perl |
2 | |
3 | use strict; |
4 | use warnings; |
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5 | |
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6 | require q(./test.pl); plan(tests => 4); |
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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 | sub hello { 'Diamond_A::hello' } |
23 | } |
24 | { |
25 | package Diamond_B; |
26 | use base 'Diamond_A'; |
27 | } |
28 | { |
29 | package Diamond_C; |
30 | use base 'Diamond_A'; |
31 | |
32 | sub hello { 'Diamond_C::hello' } |
33 | } |
34 | { |
35 | package Diamond_D; |
36 | use base ('Diamond_B', 'Diamond_C'); |
37 | use mro 'c3'; |
38 | } |
39 | |
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40 | ok(eq_array( |
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41 | mro::get_linear_isa('Diamond_D'), |
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42 | [ qw(Diamond_D Diamond_B Diamond_C Diamond_A) ] |
43 | ), '... got the right MRO for Diamond_D'); |
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44 | |
45 | is(Diamond_D->hello, 'Diamond_C::hello', '... method resolved itself as expected'); |
46 | is(Diamond_D->can('hello')->(), 'Diamond_C::hello', '... can(method) resolved itself as expected'); |
47 | is(UNIVERSAL::can("Diamond_D", 'hello')->(), 'Diamond_C::hello', '... can(method) resolved itself as expected'); |