晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 .
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Current File : //usr/share/doc/perl-Test-Simple/t/Test2/modules/Util.t
use strict;
use warnings;

our $TIME;
BEGIN {
    *CORE::GLOBAL::time = sub() {
        return CORE::time() unless defined $TIME;
        return $TIME;
    };
}

use Config qw/%Config/;

use Test2::Tools::Tiny;
use Test2::Util qw/
    try

    get_tid USE_THREADS

    pkg_to_file

    CAN_FORK
    CAN_THREAD
    CAN_REALLY_FORK

    ipc_separator
    gen_uid

    CAN_SIGSYS

    IS_WIN32

    clone_io
/;

BEGIN {
    if ($] lt "5.008") {
        require Test::Builder::IO::Scalar;
    }
}

{
    for my $try (\&try, Test2::Util->can('_manual_try'), Test2::Util->can('_local_try')) {
        my ($ok, $err) = $try->(sub { die "xxx" });
        ok(!$ok, "cought exception");
        like($err, qr/xxx/, "expected exception");

        ($ok, $err) = $try->(sub { 0 });
        ok($ok,   "Success");
        ok(!$err, "no error");
    }
}

is(pkg_to_file('A::Package::Name'), 'A/Package/Name.pm', "Converted package to file");

# Make sure running them does not die
# We cannot really do much to test these.
CAN_THREAD();
CAN_FORK();
CAN_REALLY_FORK();
IS_WIN32();

is(IS_WIN32(), ($^O eq 'MSWin32') ? 1 : 0, "IS_WIN32 is correct ($^O)");

my %sigs = map {$_ => 1} split /\s+/, $Config{sig_name};
if ($sigs{SYS}) {
    ok(CAN_SIGSYS, "System has SIGSYS");
}
else {
    ok(!CAN_SIGSYS, "System lacks SIGSYS");
}

my $check_for_sig_sys = Test2::Util->can('_check_for_sig_sys');
ok($check_for_sig_sys->("FOO SYS BAR"), "Found SIGSYS in the middle");
ok($check_for_sig_sys->("SYS FOO BAR"), "Found SIGSYS at start");
ok($check_for_sig_sys->("FOO BAR SYS"), "Found SIGSYS at end");
ok(!$check_for_sig_sys->("FOO SYSX BAR"), "SYSX is not SYS");
ok(!$check_for_sig_sys->("FOO XSYS BAR"), "XSYS is not SYS");

my $io = clone_io(\*STDOUT);
ok($io, "Cloned the filehandle");
close($io);

my $fh;
my $out = '';
if ($] ge "5.008") {
    open($fh, '>', \$out) or die "Could not open filehandle";
} else {
    $fh = Test::Builder::IO::Scalar->new(\$out) or die "Could not open filehandle";
}

$io = clone_io($fh);
is($io, $fh, "For a scalar handle we simply return the original handle, no other choice");
print $io "Test\n";

is($out, "Test\n", "wrote to the scalar handle");

is(ipc_separator(), '~', "Got ipc_separator");

{
    local $TIME = time;
    my $id1 = gen_uid();
    my $id2 = gen_uid();

    like($id1, qr/^\Q$$~0~$TIME~\E\d+$/, "Got a UID ($id1)");
    my ($inc) = ($id1 =~ m/(\d+)$/g);
    $inc++;
    is($id2, "$$~0~$TIME~$inc", "Next id is next in sequence ($id2)");
}

done_testing;

haha - 2025