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|
#!/usr/bin/perl
use v5.14;
use warnings;
use Test2::V0;
use Future;
use Future::Mutex;
# done
{
my $mutex = Future::Mutex->new;
ok( $mutex->available, 'Mutex is available' );
my $f;
my $lf = $mutex->enter( sub { $f = t::Future::Subclass->new } );
ok( defined $lf, '->enter returns Future' );
ok( defined $f, '->enter on new Mutex runs code' );
isa_ok( $lf, [ "t::Future::Subclass" ], '$lf' );
ok( !$mutex->available, 'Mutex is unavailable' );
ok( !$lf->is_ready, 'locked future not yet ready' );
$f->done;
ok( $lf->is_ready, 'locked future ready after $f->done' );
ok( $mutex->available, 'Mutex is available again' );
undef $f;
is_oneref( $lf, '$lf has one ref at EOT' );
}
# done chaining
{
my $mutex = Future::Mutex->new;
my $f1;
my $lf1 = $mutex->enter( sub { $f1 = t::Future::Subclass->new } );
my $f2;
my $lf2 = $mutex->enter( sub { $f2 = t::Future::Subclass->new } );
isa_ok( $lf1, [ "t::Future::Subclass" ], '$lf1' );
isa_ok( $lf2, [ "t::Future::Subclass" ], '$lf2' );
is_oneref( $lf2, '$lf2 has one ref' );
ok( !defined $f2, 'second enter not invoked while locked' );
$f1->done;
ok( defined $f2, 'second enter invoked after $f1->done' );
$f2->done;
ok( $lf2->is_ready, 'second locked future ready after $f2->done' );
ok( $mutex->available, 'Mutex is available again' );
undef $f1;
undef $f2;
is_oneref( $lf1, '$lf1 has one ref at EOT' );
is_oneref( $lf2, '$lf2 has one ref at EOT' );
}
# fail chaining
{
my $mutex = Future::Mutex->new;
my $f1;
my $lf1 = $mutex->enter( sub { $f1 = Future->new } );
my $f2;
my $lf2 = $mutex->enter( sub { $f2 = Future->new } );
ok( !defined $f2, 'second enter not invoked while locked' );
$f1->fail( "oops" );
ok( defined $f2, 'second enter invoked after $f1->fail' );
ok( $lf1->failure, 'first locked future fails after $f1->fail' );
$f2->done;
ok( $lf2->is_ready, 'second locked future ready after $f2->done' );
ok( $mutex->available, 'Mutex is available again' );
}
# immediately done
{
my $mutex = Future::Mutex->new;
is( $mutex->enter( sub { Future->done( "result" ) } )->result,
"result",
'$mutex->enter returns immediate result' );
ok( $mutex->available, 'Mutex is available again' );
}
# immediately fail
{
my $mutex = Future::Mutex->new;
is( $mutex->enter( sub { Future->fail( "oops" ) } )->failure,
"oops",
'$mutex->enter returns immediate failure' );
ok( $mutex->available, 'Mutex is available again' );
}
# code dies
{
my $mutex = Future::Mutex->new;
is( $mutex->enter( sub { die "oopsie\n" } )->failure,
"oopsie\n",
'$mutex->enter returns immediate failure on exception' );
ok( $mutex->available, 'Mutex is available again' );
}
# cancellation
{
my $mutex = Future::Mutex->new;
my $f = $mutex->enter( sub { Future->new } );
$f->cancel;
ok( $mutex->available, 'Mutex is available after cancel' );
}
# queueing
{
my $mutex = Future::Mutex->new;
my ( $f1, $f2, $f3 );
my $f = Future->needs_all(
$mutex->enter( sub { $f1 = t::Future::Subclass->new } ),
$mutex->enter( sub { $f2 = t::Future::Subclass->new } ),
$mutex->enter( sub { $f3 = t::Future::Subclass->new } ),
);
isa_ok( $f, [ "t::Future::Subclass" ], '$f' );
ok( defined $f1, '$f1 defined' );
$f1->done;
ok( defined $f2, '$f2 defined' );
$f2->done;
ok( defined $f3, '$f3 defined' );
$f3->done;
ok( $f->is_done, 'Chain is done' );
ok( $mutex->available, 'Mutex is available after chain done' );
}
# queueing with weakly held intermediates
{
my $mutex = Future::Mutex->new;
my ( $f1, $f2, $f3, $f4 );
my $f = Future->needs_all(
$mutex->enter( sub { ( $f1 = Future->new )->then( sub { $f2 = Future->new } ) } ),
$mutex->enter( sub { ( $f3 = Future->new )->then( sub { $f4 = Future->new } ) } ),
);
$f1->done;
$f2->done;
$f3->done;
$f4->done;
ok( $f->is_done, 'Chain is done' );
}
# counting
{
my $mutex = Future::Mutex->new( count => 2 );
is( $mutex->available, 2, 'Mutex has 2 counts available' );
my ( $f1, $f2, $f3 );
my $f = Future->needs_all(
$mutex->enter( sub { $f1 = Future->new } ),
$mutex->enter( sub { $f2 = Future->new } ),
$mutex->enter( sub { $f3 = Future->new } ),
);
ok( defined $f1 && defined $f2, '$f1 and $f2 defined with count 2' );
$f1->done;
ok( defined $f3, '$f3 defined after $f1 done' );
$f2->done;
$f3->done;
ok( $f->is_done, 'Chain is done' );
ok( $mutex->available, 'Mutex is available after chain done' );
}
done_testing;
package t::Future::Subclass;
use base qw( Future );
|
