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fix occasional op/time.t failure
[perl5.git] / t / op / time.t
1 #!./perl
2
3 $does_gmtime = gmtime(time);
4
5 BEGIN {
6     chdir 't' if -d 't';
7     @INC = '../lib';
8     require './test.pl';
9 }
10
11 plan tests => 8;
12
13 ($beguser,$begsys) = times;
14
15 $beg = time;
16
17 while (($now = time) == $beg) { sleep 1 }
18
19 ok($now > $beg && $now - $beg < 10,             'very basic time test');
20
21 for ($i = 0; $i < 1_000_000; $i++) {
22     for my $j (1..100) {}; # burn some user cycles
23     ($nowuser, $nowsys) = times;
24     $i = 2_000_000 if $nowuser > $beguser && ( $nowsys >= $begsys ||
25                                             (!$nowsys && !$begsys));
26     last if time - $beg > 20;
27 }
28
29 ok($i >= 2_000_000, 'very basic times test');
30
31 ($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst) = localtime($beg);
32 ($xsec,$foo) = localtime($now);
33 $localyday = $yday;
34
35 ok($sec != $xsec && $mday && $year,             'localtime() list context');
36
37 ok(localtime() =~ /^(Sun|Mon|Tue|Wed|Thu|Fri|Sat)[ ]
38                     (Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)[ ]
39                     ([ \d]\d)\ (\d\d):(\d\d):(\d\d)\ (\d{4})$
40                   /x,
41    'localtime(), scalar context'
42   );
43
44 SKIP: {
45     # This conditional of "No tzset()" is stolen from ext/POSIX/t/time.t
46     skip "No tzset()", 1
47         if $^O eq "MacOS" || $^O eq "VMS" || $^O eq "cygwin" ||
48            $^O eq "djgpp" || $^O eq "MSWin32" || $^O eq "dos" ||
49            $^O eq "interix";
50
51 # check that localtime respects changes to $ENV{TZ}
52 $ENV{TZ} = "GMT-5";
53 ($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst) = localtime($beg);
54 $ENV{TZ} = "GMT+5";
55 ($sec,$min,$hour2,$mday,$mon,$year,$wday,$yday,$isdst) = localtime($beg);
56 ok($hour != $hour2,                             'changes to $ENV{TZ} respected');
57 }
58
59 SKIP: {
60     skip "No gmtime()", 3 unless $does_gmtime;
61
62 ($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst) = gmtime($beg);
63 ($xsec,$foo) = localtime($now);
64
65 ok($sec != $xsec && $mday && $year,             'gmtime() list context');
66
67 my $day_diff = $localyday - $yday;
68 ok( grep({ $day_diff == $_ } (0, 1, -1, 364, 365, -364, -365)),
69                      'gmtime() and localtime() agree what day of year');
70
71
72 # This could be stricter.
73 ok(gmtime() =~ /^(Sun|Mon|Tue|Wed|Thu|Fri|Sat)[ ]
74                  (Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)[ ]
75                  ([ \d]\d)\ (\d\d):(\d\d):(\d\d)\ (\d{4})$
76                /x,
77    'gmtime(), scalar context'
78   );
79 }