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204e6232 BF |
1 | #!./perl |
2 | ||
3 | use strict; | |
4 | use warnings; | |
5 | BEGIN { | |
6 | unless (-d 'blib') { | |
7 | chdir 't' if -d 't'; | |
204e6232 | 8 | } |
624c42e2 N |
9 | require './test.pl'; |
10 | set_up_inc('../lib'); | |
204e6232 BF |
11 | } |
12 | use utf8; | |
13 | use open qw( :utf8 :std ); | |
14 | ||
204e6232 BF |
15 | plan(skip_all => "Your system has no SIGALRM") if !exists $SIG{ALRM}; |
16 | plan(tests => 8); | |
17 | ||
18 | require mro; | |
19 | ||
20 | =pod | |
21 | ||
22 | These are like the 010_complex_merge_classless test, | |
23 | but an infinite loop has been made in the heirarchy, | |
24 | to test that we can fail cleanly instead of going | |
25 | into an infinite loop | |
26 | ||
27 | =cut | |
28 | ||
29 | # initial setup, everything sane | |
30 | { | |
31 | package ƙ; | |
32 | use mro 'c3'; | |
33 | our @ISA = qw/ᶨ ィ/; | |
34 | package ᶨ; | |
35 | use mro 'c3'; | |
36 | our @ISA = qw/f/; | |
37 | package ィ; | |
38 | use mro 'c3'; | |
39 | our @ISA = qw/ʰ f/; | |
40 | package ʰ; | |
41 | use mro 'c3'; | |
42 | our @ISA = qw/ᶢ/; | |
43 | package ᶢ; | |
44 | use mro 'c3'; | |
45 | our @ISA = qw/ᛞ/; | |
46 | package f; | |
47 | use mro 'c3'; | |
48 | our @ISA = qw/ǝ/; | |
49 | package ǝ; | |
50 | use mro 'c3'; | |
51 | our @ISA = qw/ᛞ/; | |
52 | package ᛞ; | |
53 | use mro 'c3'; | |
54 | our @ISA = qw/Ạ B ʗ/; | |
55 | package ʗ; | |
56 | use mro 'c3'; | |
57 | our @ISA = qw//; | |
58 | package B; | |
59 | use mro 'c3'; | |
60 | our @ISA = qw//; | |
61 | package Ạ; | |
62 | use mro 'c3'; | |
63 | our @ISA = qw//; | |
64 | } | |
65 | ||
66 | # A series of 8 aberations that would cause infinite loops, | |
67 | # each one undoing the work of the previous | |
68 | my @loopies = ( | |
69 | sub { @ǝ::ISA = qw/f/ }, | |
70 | sub { @ǝ::ISA = qw/ᛞ/; @ʗ::ISA = qw/f/ }, | |
71 | sub { @ʗ::ISA = qw//; @Ạ::ISA = qw/ƙ/ }, | |
72 | sub { @Ạ::ISA = qw//; @ᶨ::ISA = qw/f ƙ/ }, | |
73 | sub { @ᶨ::ISA = qw/f/; @ʰ::ISA = qw/ƙ ᶢ/ }, | |
74 | sub { @ʰ::ISA = qw/ᶢ/; @B::ISA = qw/B/ }, | |
75 | sub { @B::ISA = qw//; @ƙ::ISA = qw/ƙ ᶨ ィ/ }, | |
76 | sub { @ƙ::ISA = qw/ᶨ ィ/; @ᛞ::ISA = qw/Ạ ʰ B ʗ/ }, | |
77 | ); | |
78 | ||
79 | foreach my $loopy (@loopies) { | |
80 | eval { | |
81 | local $SIG{ALRM} = sub { die "ALRMTimeout" }; | |
82 | alarm(3); | |
83 | $loopy->(); | |
84 | mro::get_linear_isa('ƙ', 'c3'); | |
85 | }; | |
86 | ||
87 | if(my $err = $@) { | |
88 | if($err =~ /ALRMTimeout/) { | |
89 | ok(0, "Loop terminated by SIGALRM"); | |
90 | } | |
91 | elsif($err =~ /Recursive inheritance detected/) { | |
92 | ok(1, "Graceful exception thrown"); | |
93 | } | |
94 | else { | |
95 | ok(0, "Unrecognized exception: $err"); | |
96 | } | |
97 | } | |
98 | else { | |
99 | ok(0, "Infinite loop apparently succeeded???"); | |
100 | } | |
101 | } |