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#!./perl -w
BEGIN {
$| = 1;
chdir 't' if -d 't';
@INC = '../lib';
}
print "1..18\n";
my $t = 1;
tie my $c => 'Tie::Monitor';
sub ok {
my($ok, $got, $exp, $rexp, $wexp) = @_;
my($rgot, $wgot) = (tied $c)->init(0);
print $ok ? "ok $t\n" : "# expected $exp, got $got\nnot ok $t\n";
++$t;
if ($rexp == $rgot && $wexp == $wgot) {
print "ok $t\n";
} else {
print "# read $rgot expecting $rexp\n" if $rgot != $rexp;
print "# wrote $wgot expecting $wexp\n" if $wgot != $wexp;
print "not ok $t\n";
}
++$t;
}
sub ok_undef { ok(!defined($_[0]), shift, "undef", @_) }
sub ok_numeric { ok($_[0] == $_[1], @_) }
sub ok_string { ok($_[0] eq $_[1], @_) }
my($r, $s);
# the thing itself
ok_numeric($r = $c + 0, 0, 1, 0);
ok_string($r = "$c", '0', 1, 0);
# concat
ok_string($c . 'x', '0x', 1, 0);
ok_string('x' . $c, 'x0', 1, 0);
$s = $c . $c;
ok_string($s, '00', 2, 0);
$r = 'x';
$s = $c = $r . 'y';
ok_string($s, 'xy', 1, 1);
$s = $c = $c . 'x';
ok_string($s, '0x', 2, 1);
$s = $c = 'x' . $c;
ok_string($s, 'x0', 2, 1);
$s = $c = $c . $c;
ok_string($s, '00', 3, 1);
# adapted from Tie::Counter by Abigail
package Tie::Monitor;
sub TIESCALAR {
my($class, $value) = @_;
bless {
read => 0,
write => 0,
values => [ 0 ],
};
}
sub FETCH {
my $self = shift;
++$self->{read};
$self->{values}[$#{ $self->{values} }];
}
sub STORE {
my($self, $value) = @_;
++$self->{write};
push @{ $self->{values} }, $value;
}
sub init {
my $self = shift;
my @results = ($self->{read}, $self->{write});
$self->{read} = $self->{write} = 0;
$self->{values} = [ 0 ];
@results;
}
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