Commit | Line | Data |
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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'; | |
8 | @INC = '../lib'; | |
9 | } | |
10 | } | |
11 | use utf8; | |
12 | use open qw( :utf8 :std ); | |
13 | ||
14 | require './test.pl'; | |
15 | ||
16 | plan(skip_all => "Your system has no SIGALRM") if !exists $SIG{ALRM}; | |
17 | plan(tests => 8); | |
18 | ||
19 | =pod | |
20 | ||
21 | These are like the 010_complex_merge_classless test, | |
22 | but an infinite loop has been made in the heirarchy, | |
23 | to test that we can fail cleanly instead of going | |
24 | into an infinite loop | |
25 | ||
26 | =cut | |
27 | ||
28 | # initial setup, everything sane | |
29 | { | |
30 | package ƙ; | |
31 | our @ISA = qw/ᶨ ィ/; | |
32 | package ᶨ; | |
33 | our @ISA = qw/f/; | |
34 | package ィ; | |
35 | our @ISA = qw/ʰ f/; | |
36 | package ʰ; | |
37 | our @ISA = qw/ᶢ/; | |
38 | package ᶢ; | |
39 | our @ISA = qw/ᛞ/; | |
40 | package f; | |
41 | our @ISA = qw/ǝ/; | |
42 | package ǝ; | |
43 | our @ISA = qw/ᛞ/; | |
44 | package ᛞ; | |
45 | our @ISA = qw/Ạ B ʗ/; | |
46 | package ʗ; | |
47 | our @ISA = qw//; | |
48 | package B; | |
49 | our @ISA = qw//; | |
50 | package Ạ; | |
51 | our @ISA = qw//; | |
52 | } | |
53 | ||
54 | # A series of 8 aberations that would cause infinite loops, | |
55 | # each one undoing the work of the previous | |
56 | my @loopies = ( | |
57 | sub { @ǝ::ISA = qw/f/ }, | |
58 | sub { @ǝ::ISA = qw/ᛞ/; @ʗ::ISA = qw/f/ }, | |
59 | sub { @ʗ::ISA = qw//; @Ạ::ISA = qw/ƙ/ }, | |
60 | sub { @Ạ::ISA = qw//; @ᶨ::ISA = qw/f ƙ/ }, | |
61 | sub { @ᶨ::ISA = qw/f/; @ʰ::ISA = qw/ƙ ᶢ/ }, | |
62 | sub { @ʰ::ISA = qw/ᶢ/; @B::ISA = qw/B/ }, | |
63 | sub { @B::ISA = qw//; @ƙ::ISA = qw/ƙ ᶨ ィ/ }, | |
64 | sub { @ƙ::ISA = qw/ᶨ ィ/; @ᛞ::ISA = qw/Ạ ʰ B ʗ/ }, | |
65 | ); | |
66 | ||
67 | foreach my $loopy (@loopies) { | |
68 | eval { | |
69 | local $SIG{ALRM} = sub { die "ALRMTimeout" }; | |
70 | alarm(3); | |
71 | $loopy->(); | |
72 | mro::get_linear_isa('ƙ', 'dfs'); | |
73 | }; | |
74 | ||
75 | if(my $err = $@) { | |
76 | if($err =~ /ALRMTimeout/) { | |
77 | ok(0, "Loop terminated by SIGALRM"); | |
78 | } | |
79 | elsif($err =~ /Recursive inheritance detected/) { | |
80 | ok(1, "Graceful exception thrown"); | |
81 | } | |
82 | else { | |
83 | ok(0, "Unrecognized exception: $err"); | |
84 | } | |
85 | } | |
86 | else { | |
87 | ok(0, "Infinite loop apparently succeeded???"); | |
88 | } | |
89 | } |