isa => 'Num',
predicate => 'has_attr1',
);
-
has 'attr2' => (
is => 'ro',
isa => 'Num',
predicate => 'has_attr2',
);
+ has 'attr3' => (
+ is => 'ro',
+ isa => 'Maybe[Num]',
+ predicate => 'has_attr3',
+ );
}
{
isa => 'Num',
predicate => 'has_attr2',
);
+ has 'attr3' => (
+ is => 'ro',
+ isa => 'Maybe[Num]',
+ predicate => 'has_attr3',
+ );
}
package main;
my $obj = Foo->new;
ok(!$obj->has_attr1, 'attr1 has no value before it is assigned');
ok(!$obj->has_attr2, 'attr2 has no value before it is assigned');
+ ok(!$obj->has_attr3, 'attr3 has no value before it is assigned');
}
{
my $obj = Foo->new(attr1 => undef);
ok(!$obj->has_attr1, 'UT attr1 has no value when assigned undef in constructor');
- is (exception { $obj = Foo->new(attr2 => undef) }, undef,
+ like(
+ exception { $obj = Foo->new(attr2 => undef) },
+ qr/\QAttribute (attr2) does not pass the type constraint because: Validation failed for 'Num' with value undef\E/,
'But assigning undef to attr2 generates a type constraint error');
+
+ is (exception { $obj = Foo->new(attr3 => undef) }, undef,
+ 'assigning undef to attr3 is acceptable');
+ ok($obj->has_attr3, 'attr3 retains its undef value when assigned undef in constructor');
}
{
- my $obj = Foo->new(attr1 => 1234, attr2 => 5678);
+ my $obj = Foo->new(attr1 => 1234, attr2 => 5678, attr3 => 9012);
is($obj->attr1, 1234, 'assigning a defined value during construction works as normal');
ok($obj->has_attr1, '...and the predicate returns true as normal');
+
is($obj->attr2, 5678, 'assigning a defined value during construction works as normal');
ok($obj->has_attr2, '...and the predicate returns true as normal');
+
+ is($obj->attr3, 9012, 'assigning a defined value during construction works as normal');
+ ok($obj->has_attr3, '...and the predicate returns true as normal');
}
{
my $obj = Bar->new;
ok(!$obj->has_attr1, 'attr1 has no value before it is assigned');
+ ok(!$obj->has_attr2, 'attr2 has no value before it is assigned');
+ ok(!$obj->has_attr3, 'attr3 has no value before it is assigned');
}
{
my $obj = Bar->new(attr1 => undef);
ok(!$obj->has_attr1, 'attr1 has no value when assigned undef in constructor');
+ # note this test differs from the Foo case above
is (exception { $obj = Bar->new(attr2 => undef) }, undef,
'assigning undef to attr2 does not produce an error');
ok(!$obj->has_attr2, 'attr2 has no value when assigned undef in constructor');
+
+ is( exception { $obj = Foo->new(attr3 => undef) }, undef,
+ 'assigning undef to attr3 is acceptable');
+ ok($obj->has_attr3, 'attr3 retains its undef value when assigned undef in constructor');
}
{
- my $obj = Bar->new(attr1 => 1234);
+ my $obj = Bar->new(attr1 => 1234, attr2 => 5678, attr3 => 9012);
is($obj->attr1, 1234, 'assigning a defined value during construction works as normal');
ok($obj->has_attr1, '...and the predicate returns true as normal');
+
+ is($obj->attr2, 5678, 'assigning a defined value during construction works as normal');
+ ok($obj->has_attr2, '...and the predicate returns true as normal');
+
+ is($obj->attr3, 9012, 'assigning a defined value during construction works as normal');
+ ok($obj->has_attr3, '...and the predicate returns true as normal');
}
}