1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
#!/usr/bin/perl
use v5.18;
use warnings;
use Test2::V0;
use Object::Pad 0.800 ':experimental(adjust_params)';
{
my %captured;
class WithAdjustParams {
ADJUST :params ( :$req, :$opt = "default opt" )
{
$captured{req} = $req;
$captured{opt} = $opt;
}
}
undef %captured;
WithAdjustParams->new( req => "the req", opt => "the opt" );
is( \%captured, { req => "the req", opt => "the opt" }, 'ADJUST :params saw req and opt' );
undef %captured;
WithAdjustParams->new( req => "the req" );
is( \%captured, { req => "the req", opt => "default opt" }, 'ADJUST :params saw req and default opt' );
my $LINE = __LINE__+1;
ok( !defined eval { WithAdjustParams->new(); 1 }, 'Missing required parameter throws exception' );
like( $@, qr/^Required parameter 'req' is missing for WithAdjustParams constructor at \S+ line $LINE\./,
'Exception thrown from constructor with missing parameter' );
}
{
my %captured;
class WithAdjustParamsDefaults {
ADJUST :params ( :$x = "default X", :$y //= "default Y", :$z ||= "default Z" )
{
$captured{x} = $x;
$captured{y} = $y;
$captured{z} = $z;
}
}
undef %captured;
WithAdjustParamsDefaults->new( x => "the X", y => "the Y", z => "the Z" );
is( \%captured, { x => "the X", y => "the Y", z => "the Z" }, 'ADJUST :params saw passed values' );
undef %captured;
WithAdjustParamsDefaults->new();
is( \%captured, { x => "default X", y => "default Y", z => "default Z" },
'ADJUST :params saw defaults when absent' );
undef %captured;
WithAdjustParamsDefaults->new( x => undef, y => undef, z => undef );
is( \%captured, { x => undef, y => "default Y", z => "default Z" },
'ADJUST :params saw x undef but y z defaults when undef' );
undef %captured;
WithAdjustParamsDefaults->new( x => "", y => "", z => "" );
is( \%captured, { x => "", y => "", z => "default Z" },
'ADJUST :params saw x y "" but z defaults when ""' );
}
{
class StrictlyWithParams :strict(params) {
# Check that a trailing comma is permitted
ADJUST :params ( :$param = undef, ) { }
}
ok( defined eval { StrictlyWithParams->new( param => 123 ) }, ':strict(params) is OK' )
or diag( "Exception was: $@" );
ok( !defined eval { StrictlyWithParams->new( more => 2 ) }, ':strict(params) complains about others' );
}
{
my %captured;
class WithRestParams {
ADJUST :params ( :$one = 1, :$two = 2, %params ) {
%captured = %params;
}
}
undef %captured;
WithRestParams->new( one => 111, three => 3 );
is( \%captured, { three => 3 }, 'ADJUST :params rest views remaining params' );
}
{
my %captured;
class StrictlyWithRestParams :strict(params) {
ADJUST :params ( %params ) {
%captured = %params; %params = ();
}
}
StrictlyWithRestParams->new( unknown => "OK" );
is( \%captured, { unknown => "OK" }, 'ADJUST :params rest can consume params' );
}
{
class ExpressionOrder {
field $val;
ADJUST :params (
:$first = undef,
:$second = uc $first,
) {
$val = $second;
}
method val { return $val; }
}
is( ExpressionOrder->new( first => "value" )->val, "VALUE",
'Named param expressions are evaluated in order' );
}
# out-of-block control flow emits warnings
{
my $warnings;
BEGIN { $SIG{__WARN__} = sub { $warnings .= $_[0] }; }
my $WARNLINE;
class ReturnFromAdjust {
$WARNLINE = __LINE__+1;
ADJUST { return; }
}
BEGIN { undef $SIG{__WARN__} }
like( $warnings,
qr/^Using return to leave an ADJUST phaser is discouraged and will be removed in a later version at \S+ line $WARNLINE\./,
'return from ADJUST emits warning' );
}
use Object::Pad ':experimental(composed_adjust)';
# class with composed ADJUST phasers
{
class ComposedAdjust {
field $adjusted;
field $a = "a";
ADJUST { $adjusted .= $a; }
ADJUST { $adjusted .= "b"; }
field $c = "c";
ADJUST { $adjusted .= $c; }
method result { $adjusted }
}
is( ComposedAdjust->new->result, "abc", 'Composed ADJUST phasers still work' );
}
# ADJUST :params can also be composed
{
class ComposedAdjustParams {
field $adjusted;
ADJUST { $adjusted .= "a"; }
ADJUST :params ( :$x ) { $adjusted .= $x; }
ADJUST { $adjusted .= "c"; }
method result { $adjusted }
}
is( ComposedAdjustParams->new( x => "X" )->result, "aXc", 'Composed ADJUST phasers permit :params' );
}
done_testing;
|
