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|
#!/usr/bin/perl
use v5.18;
use warnings;
use Test2::V0;
use Object::Pad 0.800;
package Base::Class {
sub new {
my $class = shift;
my ( $ok ) = @_;
::is( $ok, "ok", '@_ to Base::Class::new' );
::is( scalar @_, 1, 'scalar @_ to Base::Class::new' );
return bless { base_field => 123 }, $class;
}
sub fields {
my $self = shift;
return "base_field=$self->{base_field}"
}
}
my @BUILDS_INVOKED;
class Derived::Class {
inherit Base::Class;
field $derived_field = 456;
BUILD {
my @args = @_;
::is( \@args, [ "ok" ], '@_ to Derived::Class::BUILD' );
push @BUILDS_INVOKED, __PACKAGE__;
}
method fields {
return $self->SUPER::fields . ",derived_field=$derived_field";
}
}
{
my $obj = Derived::Class->new( "ok" );
is( $obj->fields, "base_field=123,derived_field=456",
'$obj->fields' );
is( \@BUILDS_INVOKED, [qw( Derived::Class )],
'BUILD invoked correctly' );
# We don't mind what the output here is but it should be well-behaved
# and not crash the dumper
use Data::Dumper;
local $Data::Dumper::Sortkeys = 1;
is( Dumper($obj) =~ s/\s+//gr,
q($VAR1=bless({'Object::Pad/slots'=>[456],'base_field'=>123},'Derived::Class');),
'Dumper($obj) of Object::Pad-extended foreign HASH class' );
}
@BUILDS_INVOKED = ();
# Ensure that double-derived classes still chain down to foreign new
{
class DoubleDerived {
inherit Derived::Class;
BUILD {
push @BUILDS_INVOKED, __PACKAGE__;
}
method fields {
return $self->SUPER::fields . ",doubled=yes";
}
}
is( DoubleDerived->new( "ok" )->fields,
"base_field=123,derived_field=456,doubled=yes",
'Double-derived from foreign still invokes base constructor' );
is( \@BUILDS_INVOKED, [qw( Derived::Class DoubleDerived )],
'BUILD invoked correctly for double-derived class' );
}
# Various RT132263 test cases
{
package RT132263::Parent;
sub new {
my $class = shift;
my $self = bless {}, $class;
$self->{result} = $self->example_method;
return $self;
}
}
# Test case one - no field access in example_method
{
class RT132263::Child1 {
inherit RT132263::Parent;
method example_method { 1 }
}
my $e;
ok( !defined( $e = dies { RT132263::Child1->new } ),
'RT132263 case 1 constructs OK' ) or
diag( "Exception was $e" );
}
# Test case two - read from an initialised field
{
class RT132263::Child2 {
inherit RT132263::Parent;
field $value = 456;
method example_method { $value }
}
my $obj;
my $e;
ok( !defined( $e = dies { $obj = RT132263::Child2->new } ),
'RT132263 case 2 constructs OK' ) or
diag( "Exception was $e" );
# gutwrench into internals
is( scalar @{ $obj->{'Object::Pad/slots'} }, 1,
'slots ARRAY contains correct number of elements' );
}
# Check we are not allowed to switch the representation type back to native
{
like( dies {
eval( "class SwitchedToNative :isa(Base::Class) :repr(native) { }" ) or die $@;
},
qr/^Cannot switch a subclass of a foreign superclass type to :repr\(native\) at /,
'Exception from switching a foreign derived class back to native representation' );
}
{
my $newarg_destroyed;
my $buildargs_result_destroyed;
package DestroyWatch {
sub new { bless [ $_[1] ], $_[0] }
sub DESTROY { ${ $_[0][0] }++ }
}
package RefcountTest::Base {
sub new { bless {}, shift }
}
class RefcountTest {
inherit RefcountTest::Base;
sub BUILDARGS {
return DestroyWatch->new( \$buildargs_result_destroyed )
}
}
RefcountTest->new( DestroyWatch->new( \$newarg_destroyed ) );
is( $newarg_destroyed, 1, 'argument to ->new destroyed' );
is( $buildargs_result_destroyed, 1, 'result of BUILDARGS destroyed' );
}
# Ensure next::method works with subclassing (RT#150794)
{
package RT150794::Base {
sub new { return bless {}, shift }
sub configure {}
}
class RT150794::Derived {
inherit RT150794::Base;
method configure { $self->next::method }
}
is(
scalar( grep { $_ eq "Object::Pad::UNIVERSAL" } @RT150794::Derived::ISA ),
1,
'RT150794::Derived @ISA contains Object::Pad::UNIVERSAL only once' );
RT150794::Derived->new->configure;
}
done_testing;
|
