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|
use v5.10;
use strict;
use warnings;
use Test2::V0 0.000148; # is_refcount
use Future;
use constant FUTURE_HAS_CONVERGENT_ALSO => ( !defined $Future::XS::VERSION or $Future::XS::VERSION >= 0.13 );
# All done
{
my $f1 = Future->new;
my $f2 = Future->new;
my $future = Future->needs_all( $f1, $f2 );
is_oneref( $future, '$future has refcount 1 initially' );
# Two refs; one lexical here, one in $future
is_refcount( $f1, 2, '$f1 has refcount 2 after adding to ->needs_all' );
is_refcount( $f2, 2, '$f2 has refcount 2 after adding to ->needs_all' );
my $ready;
$future->on_ready( sub { $ready++ } );
ok( !$future->is_ready, '$future not yet ready' );
$f1->done( one => 1 );
$f2->done( two => 2 );
is( $ready, 1, '$future is now ready' );
ok( $future->is_ready, '$future now ready after f2 ready' );
is( [ $future->result ], [ one => 1, two => 2 ], '$future->result after f2 ready' );
is_refcount( $future, 1, '$future has refcount 1 at end of test' );
undef $future;
is_refcount( $f1, 1, '$f1 has refcount 1 at end of test' );
is_refcount( $f2, 1, '$f2 has refcount 1 at end of test' );
}
# One fails
{
my $f1 = Future->new;
my $f2 = Future->new;
my $c2;
$f2->on_cancel( sub { $c2++ } );
my $future = Future->needs_all( $f1, $f2 );
my $ready;
$future->on_ready( sub { $ready++ } );
ok( !$future->is_ready, '$future not yet ready' );
$f1->fail( "It fails" );
is( $ready, 1, '$future is now ready' );
ok( $future->is_ready, '$future now ready after f1 fails' );
is( $future->failure, "It fails", '$future->failure yields exception' );
my $file = __FILE__;
my $line = __LINE__ + 1;
like( dies { $future->result }, qr/^It fails at \Q$file line $line\E\.?\n$/, '$future->result throws exception' );
is( $c2, 1, 'Unfinished child future cancelled on failure' );
is( [ $future->pending_futures ],
[],
'$future->pending_futures after $f1 failure' );
is( [ $future->ready_futures ],
[ $f1, $f2 ],
'$future->ready_futures after $f1 failure' );
is( [ $future->done_futures ],
[],
'$future->done_futures after $f1 failure' );
is( [ $future->failed_futures ],
[ $f1 ],
'$future->failed_futures after $f1 failure' );
is( [ $future->cancelled_futures ],
[ $f2 ],
'$future->cancelled_futures after $f1 failure' );
}
# immediately done
{
my $future = Future->needs_all( Future->done );
ok( $future->is_ready, '$future of already-done sub already ready' );
}
# immediately fails
{
my $future = Future->needs_all( Future->fail("F1"), Future->done );
ok( $future->is_ready, '$future of already-failed sub already ready' );
}
# cancel propagation
{
my $f1 = Future->new;
my $c1;
$f1->on_cancel( sub { $c1++ } );
my $f2 = Future->new;
my $c2;
$f2->on_cancel( sub { $c2++ } );
my $future = Future->needs_all( $f1, $f2 );
$f2->done;
$future->cancel;
is( $c1, 1, '$future->cancel marks subs cancelled' );
is( $c2, undef, '$future->cancel ignores ready subs' );
}
# cancelled convergent
{
my $f1 = Future->new;
my $f2 = Future->new;
my $future = Future->needs_all( $f1, $f2 );
$f1->cancel;
ok( $future->is_ready, '$future of cancelled sub is ready after first cancellation' );
like( scalar $future->failure, qr/ cancelled/, 'Failure mentions cancelled' );
}
# 'also' subs don't get cancelled
if( FUTURE_HAS_CONVERGENT_ALSO ) {
my $falso = Future->new;
my $calso;
$falso->on_cancel( sub { $calso++ } );
my $future = Future->needs_all( also => $falso );
$future->cancel;
is( $calso, undef, '$future->cancel does not cancel $falso' );
my $f1 = Future->new;
$future = Future->needs_all( $f1, also => $falso );
$f1->fail( "Oops\n" );
is( $calso, undef, '$f1->fail does not cancel $falso' );
}
# needs_all on none
{
my $f = Future->needs_all( () );
ok( $f->is_ready, 'needs_all on no futures already done' );
is( [ $f->result ], [], '->result on empty needs_all is empty' );
}
# weakself retention (RT120468)
{
my $f = Future->new;
my $wait;
$wait = Future->needs_all(
$f,
my $cancelled = Future->new->on_cancel( sub {
undef $wait;
}),
);
ok( lives { $f->fail("oopsie\n") },
'no problems cancelling a Future which clears the original ->needs_all ref' );
ok( $cancelled->is_cancelled, 'cancellation occured as expected' );
ok( $f->is_failed, '->needs_all is marked as done' );
}
# With a cancelled subfuture (RT144459)
foreach ([ precancelled => 0 ], [ postcancelled => 1 ])
{
my ( $title, $cancel_after ) = @$_;
my $f1 = Future->new;
my $f2 = Future->new;
$f2->cancel if !$cancel_after;
my $f = Future->needs_all( $f1, $f2 );
$f2->cancel if $cancel_after;
ok( $f->is_failed, "needs_all already failed for $title" );
is( scalar $f->failure, "A component future was cancelled", "->failure on needs_all for $title" );
$f1->cancel;
}
done_testing;
|
