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util.c:get_db_sub: correct comment
[perl5.git] / dist / Thread-Queue / t / 05_extract.t
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1use strict;
2use warnings;
3
4BEGIN {
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5 use Config;
6 if (! $Config{'useithreads'}) {
3d4f2f89 7 print("1..0 # SKIP Perl not compiled with 'useithreads'\n");
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8 exit(0);
9 }
10}
11
12use threads;
13use Thread::Queue;
14
15if ($] == 5.008) {
16 require 't/test.pl'; # Test::More work-alike for Perl 5.8.0
17} else {
18 require Test::More;
19}
20Test::More->import();
21plan('tests' => 20);
22
23my $q = Thread::Queue->new(1..10);
24ok($q, 'New queue');
25
26threads->create(sub {
27 # Default count = 1
28 is($q->extract(), 1, 'No args'); # 2..10 left
29 is($q->extract(0), 2, 'Head'); # 3..10 left
30 is($q->extract(5), 8, 'Pos index'); # 3..7,9,10 left
31 is($q->extract(-3), 7, 'Neg index'); # 3..6,9,10 left
32 my $x = $q->extract(20); # unchanged
33 ok(! defined($x), 'Big index');
34 $x = $q->extract(-20); # unchanged
35 ok(! defined($x), 'Big neg index');
36})->join();
37
38$q = Thread::Queue->new(1..10);
39ok($q, 'New queue');
40
41threads->create(sub {
42 my @x = $q->extract(0, 2); # 3..10 left
43 is_deeply(\@x, [1,2], '2 from head');
44 @x = $q->extract(6, 2); # 3..8 left
45 is_deeply(\@x, [9,10], '2 from tail');
46 @x = $q->extract(2, 2); # 3,4,7,8 left
47 is_deeply(\@x, [5,6], '2 from middle');
48 @x = $q->extract(2, 4); # 3,4 left
49 is_deeply(\@x, [7,8], 'Lots from tail');
50 @x = $q->extract(3, 4); # unchanged
51 is_deeply(\@x, [], 'Too far');
52})->join();
53
54$q = Thread::Queue->new(1..10);
55ok($q, 'New queue');
56
57threads->create(sub {
58 my @x = $q->extract(-4, 2); # 1..6,9,10 left
59 is_deeply(\@x, [7,8], 'Neg index');
60 @x = $q->extract(-2, 4); # 1..6 left
61 is_deeply(\@x, [9,10], 'Lots from tail');
62 @x = $q->extract(-6, 2); # 3..6 left
63 is_deeply(\@x, [1,2], 'Max neg index');
64 @x = $q->extract(-10, 3); # unchanged
65 is_deeply(\@x, [], 'Too far');
66 @x = $q->extract(-6, 3); # 4..6 left
67 is_deeply(\@x, [3], 'Neg overlap');
68 @x = $q->extract(-5, 10); # empty
69 is_deeply(\@x, [4..6], 'Neg big overlap');
70})->join();
71
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72exit(0);
73
54c7876f 74# EOF