11 tie my $c => 'Tie::Monitor';
13 sub expected_tie_calls {
14 my ($obj, $rexp, $wexp) = @_;
15 local $::Level = $::Level + 1;
16 my ($rgot, $wgot) = $obj->init();
21 # Use ok() instead of is(), cmp_ok() etc, to strictly control number of accesses
23 ok($r = $c + 0 == 0, 'the thing itself');
24 expected_tie_calls(tied $c, 1, 0);
25 ok($r = "$c" eq '0', 'the thing itself');
26 expected_tie_calls(tied $c, 1, 0);
28 ok($c . 'x' eq '0x', 'concat');
29 expected_tie_calls(tied $c, 1, 0);
30 ok('x' . $c eq 'x0', 'concat');
31 expected_tie_calls(tied $c, 1, 0);
33 ok($s eq '00', 'concat');
34 expected_tie_calls(tied $c, 2, 0);
37 ok($s eq 'xy', 'concat');
38 expected_tie_calls(tied $c, 1, 1);
40 ok($s eq '0x', 'concat');
41 expected_tie_calls(tied $c, 2, 1);
43 ok($s eq 'x0', 'concat');
44 expected_tie_calls(tied $c, 2, 1);
46 ok($s eq '00', 'concat');
47 expected_tie_calls(tied $c, 3, 1);
50 ok($s eq '0', 'multiple magic in core functions');
51 expected_tie_calls(tied $c, 1, 1);
54 my $tied_to = tied $c;
58 'Assignment should not ignore magic when the last thing assigned was a glob');
59 expected_tie_calls($tied_to, 1, 1);
61 # A plain *foo should not call get-magic on *foo.
62 # This method of scalar-tying an immutable glob relies on details of the
63 # current implementation that are subject to change. This test may need to
64 # be rewritten if they do change.
65 my $tyre = tie $::{gelp} => 'Tie::Monitor';
66 # Compilation of this eval autovivifies the *gelp glob.
67 eval '$tyre->init(0); () = \*gelp';
68 my($rgot, $wgot) = $tyre->init(0);
69 ok($rgot == 0, 'a plain *foo causes no get-magic');
70 ok($wgot == 0, 'a plain *foo causes no set-magic');
72 # get-magic when exiting a non-lvalue sub in potentially autovivify-
74 $tied_to = tie $_{elem}, "Tie::Monitor";
75 eval { () = sub { delete $_{elem} }->()->[3] };
76 ok +($tied_to->init)[0],
77 'get-magic is called on mortal magic var on sub exit in autoviv context';
78 $tied_to = tie $_{elem}, "Tie::Monitor";
79 eval { () = sub { return delete $_{elem} }->()->[3] };
80 ok +($tied_to->init)[0],
81 'get-magic is called on mortal magic var on return in autoviv context';
85 # adapted from Tie::Counter by Abigail
89 my($class, $value) = @_;
100 $self->{values}[$#{ $self->{values} }];
104 my($self, $value) = @_;
106 push @{ $self->{values} }, $value;
111 my @results = ($self->{read}, $self->{write});
112 $self->{read} = $self->{write} = 0;
113 $self->{values} = [ 0 ];