Implement uid() and validate_uid()

[perl/modules/Scope-Upper.git] / t / 79-uid-threads.t

diff --git a/t/79-uid-threads.t b/t/79-uid-threads.t
new file mode 100644 (file)
index 0000000..4818c03
--- /dev/null
+++ b/t/79-uid-threads.t
@@ -0,0 +1,78 @@
+#!perl -T
+
+use strict;
+use warnings;
+
+sub skipall {
+ my ($msg) = @_;
+ require Test::More;
+ Test::More::plan(skip_all => $msg);
+}
+
+use Config qw<%Config>;
+
+BEGIN {
+ my $force = $ENV{PERL_SCOPE_UPPER_TEST_THREADS} ? 1 : !1;
+ my $t_v   = $force ? '0' : '1.67';
+ skipall 'This perl wasn\'t built to support threads'
+                                                    unless $Config{useithreads};
+ skipall 'perl 5.13.4 required to test thread safety'
+                                              unless $force or "$]" >= 5.013004;
+ skipall "threads $t_v required to test thread safety"
+                                              unless eval "use threads $t_v; 1";
+}
+
+use Test::More;
+
+use Scope::Upper qw<uid validate_uid UP HERE SU_THREADSAFE>;
+
+my $num;
+
+BEGIN {
+ skipall 'This Scope::Upper isn\'t thread safe' unless SU_THREADSAFE;
+ plan tests => ($num = 30) * 5 + 1;
+ defined and diag "Using threads $_" for $threads::VERSION;
+ if (eval "use Time::HiRes; 1") {
+  defined and diag "Using Time::HiRes $_" for $Time::HiRes::VERSION;
+  *usleep = \&Time::HiRes::usleep;
+ } else {
+  diag 'Using fallback usleep';
+  *usleep = sub {
+   my $s = int($_[0] / 2.5e5);
+   sleep $s if $s;
+  };
+ }
+}
+
+my $top = uid;
+
+sub cb {
+ my $tid  = threads->tid();
+
+ my $here = uid;
+ my $up;
+ {
+  $up = uid HERE;
+  is uid(UP), $here, "uid(UP) == \$here in block (in thread $tid)";
+ }
+
+ is uid(UP), $top, "uid(UP) == \$top (in thread $tid)";
+
+ usleep rand(1e6);
+
+ ok validate_uid($here), "\$here is valid (in thread $tid)";
+ ok !validate_uid($up),  "\$up is no longer valid (in thread $tid)";
+
+ return $here;
+}
+
+my %uids;
+
+for my $thread (map threads->create(\&cb), 1 .. $num) {
+ my $tid = $thread->tid;
+ my $uid = $thread->join;
+ ++$uids{$uid};
+ ok !validate_uid($uid), "\$here is no longer valid (out of thread $tid)";
+}
+
+is scalar(keys %uids), $num, 'all the UIDs were different';