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|
#!/usr/bin/perl
use v5.14;
use warnings;
use Test2::V0;
use Future;
use Future::Utils qw( repeat try_repeat try_repeat_until_success );
{
my $trial_f;
my $previous_trial;
my $arg;
my $again;
my $future = repeat {
$previous_trial = shift;
return $trial_f = Future->new
} while => sub { $arg = shift; $again };
ok( defined $future, '$future defined for repeat while' );
ok( defined $trial_f, 'An initial future is running' );
my $first_f = $trial_f;
$again = 1;
$trial_f->done( "one" );
ok( defined $arg, '$arg defined for while test' );
is( scalar $arg->result, "one", '$arg->result for first' );
ref_is( $previous_trial, $first_f, 'code block is passed previous trial' );
$again = 0;
$trial_f->done( "two" );
ok( $future->is_ready, '$future is now ready after second attempt ->done' );
is( scalar $future->result, "two", '$future->result' );
}
# return keyword
{
my $trial_f;
my $future = repeat {
return $trial_f = Future->new
} while => sub { 1 }, return => my $ret = Future->new;
ref_is( $future, $ret, 'repeat with return yields correct instance' );
}
# cancellation
{
my @running; my $i = 0;
my $future = repeat {
return $running[$i++] = Future->new
} while => sub { 1 };
ok( defined $future, '$future defined for repeat while' );
ok( defined $running[0], 'An initial future is running' );
$running[0]->done;
$future->cancel;
ok( !$running[0]->is_cancelled, 'previously running future not cancelled' );
ok( $running[1]->is_cancelled, 'running future cancelled after eventual is cancelled' );
ok( !$running[2], 'a third trial is not started' );
}
# until
{
my $trial_f;
my $arg;
my $accept;
my $future = repeat {
return $trial_f = Future->new
} until => sub { $arg = shift; $accept };
ok( defined $future, '$future defined for repeat until' );
ok( defined $trial_f, 'An initial future is running' );
$accept = 0;
$trial_f->done( "three" );
ok( defined $arg, '$arg defined for while test' );
is( scalar $arg->result, "three", '$arg->result for first' );
$accept = 1;
$trial_f->done( "four" );
ok( $future->is_ready, '$future is now ready after second attempt ->done' );
is( scalar $future->result, "four", '$future->result' );
}
# body code dies
{
my $future;
$future = repeat {
die "It failed\n";
} while => sub { !shift->failure };
is( $future->failure, "It failed\n", 'repeat while failure after code exception' );
$future = repeat {
die "It failed\n";
} until => sub { shift->failure };
is( $future->failure, "It failed\n", 'repeat until failure after code exception' );
}
# condition code dies (RT100067)
{
my $future = repeat {
Future->done(1);
} while => sub { die "it dies!\n" };
is( $future->failure, "it dies!\n", 'repeat while failure after condition exception' );
}
# Non-Future return fails
{
my $future;
$future = repeat {
"non-Future"
} while => sub { !shift->failure };
like( $future->failure, qr/^Expected __ANON__.*\(\S+ line \d+\) to return a Future$/,
'repeat failure for non-Future return' );
}
# try_repeat catches failures
{
my $attempt = 0;
my $future = try_repeat {
if( ++$attempt < 3 ) {
return Future->new->fail( "Too low" );
}
else {
return Future->done( $attempt );
}
} while => sub { shift->failure };
ok( $future->is_ready, '$future is now ready for try_repeat' );
is( scalar $future->result, 3, '$future->result' );
}
{
my $attempt = 0;
my $future = try_repeat_until_success {
if( ++$attempt < 3 ) {
return Future->fail( "Too low" );
}
else {
return Future->done( $attempt );
}
};
ok( $future->is_ready, '$future is now ready for try_repeat_until_success' );
is( scalar $future->result, 3, '$future->result' );
}
# repeat prints a warning if asked to retry a failure
{
my $warnings = "";
local $SIG{__WARN__} = sub { $warnings .= join "", @_ };
my $attempt = 0;
my $future = repeat {
if( ++$attempt < 3 ) {
return Future->fail( "try again" );
}
else {
return Future->done( "OK" );
}
} while => sub { $_[0]->failure };
ok( $future->is_ready, '$future is now ready after repeat retries failures' );
like( $warnings, qr/(?:^Using Future::Utils::repeat to retry a failure is deprecated; use try_repeat instead at \Q$0\E line \d+\.?$)+/m,
'Warnings printing by repeat retries failures' );
}
done_testing;
|
