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1 | #!/usr/bin/perl |
2 | |
3 | use strict; |
4 | use warnings; |
5 | |
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6 | use Test::More tests => 10; |
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7 | |
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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 | |
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20 | { |
21 | package Diamond_A; |
22 | use Class::C3; |
23 | sub hello { 'Diamond_A::hello' } |
24 | } |
25 | { |
26 | package Diamond_B; |
27 | use base 'Diamond_A'; |
28 | use Class::C3; |
29 | } |
30 | { |
31 | package Diamond_C; |
32 | use Class::C3; |
33 | use base 'Diamond_A'; |
34 | |
35 | sub hello { 'Diamond_C::hello' } |
36 | } |
37 | { |
38 | package Diamond_D; |
39 | use base ('Diamond_B', 'Diamond_C'); |
40 | use Class::C3; |
41 | } |
42 | |
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43 | Class::C3::initialize(); |
44 | |
45 | |
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46 | is_deeply( |
47 | [ Class::C3::calculateMRO('Diamond_D') ], |
48 | [ qw(Diamond_D Diamond_B Diamond_C Diamond_A) ], |
49 | '... got the right MRO for Diamond_D'); |
50 | |
51 | is(Diamond_D->hello, 'Diamond_C::hello', '... method resolved itself as expected'); |
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52 | |
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53 | is(Diamond_D->can('hello')->(), 'Diamond_C::hello', '... can(method) resolved itself as expected'); |
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54 | is(UNIVERSAL::can("Diamond_D", 'hello')->(), 'Diamond_C::hello', '... can(method) resolved itself as expected'); |
55 | |
56 | # now undo the C3 |
57 | Class::C3::uninitialize(); |
58 | |
59 | is(Diamond_D->hello, 'Diamond_A::hello', '... old method resolution has been restored'); |
60 | |
61 | is(Diamond_D->can('hello')->(), 'Diamond_A::hello', '... can(method) resolution has been restored'); |
62 | is(UNIVERSAL::can("Diamond_D", 'hello')->(), 'Diamond_A::hello', '... can(method) resolution has been restored'); |
63 | |
64 | Class::C3::initialize(); |
65 | |
66 | is(Diamond_D->hello, 'Diamond_C::hello', '... C3 method restored itself as expected'); |
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67 | |
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68 | is(Diamond_D->can('hello')->(), 'Diamond_C::hello', '... C3 can(method) restored itself as expected'); |
69 | is(UNIVERSAL::can("Diamond_D", 'hello')->(), 'Diamond_C::hello', '... C3 can(method) restored itself as expected'); |