=pod
+=begin testing-SETUP
+
+use Test::Requires {
+ 'Locale::US' => '0',
+ 'Regexp::Common' => '0',
+};
+
+=end testing-SETUP
+
=head1 NAME
Moose::Cookbook::Basics::Recipe4 - Subtypes, and modeling a simple B<Company> class hierarchy
sub BUILD {
my ( $self, $params ) = @_;
- if ( @{ $self->employees } ) {
- foreach my $employee ( @{ $self->employees } ) {
- $employee->company($self);
- }
+ foreach my $employee ( @{ $self->employees || [] } ) {
+ $employee->employer($self);
}
}
after 'employees' => sub {
my ( $self, $employees ) = @_;
- if ($employees) {
- foreach my $employee ( @{$employees} ) {
- $employee->company($self);
- }
+ foreach my $employee ( @{ $employees || [] } ) {
+ $employee->employer($self);
}
};
class.
In the recipe we also make use of L<Locale::US> and L<Regexp::Common>
-to build constraints, showing how how constraints can make use of
-existing CPAN tools for data validation.
+to build constraints, showing how constraints can make use of existing
+CPAN tools for data validation.
Finally, we introduce the C<required> attribute option.
-The the C<Address> class we define two subtypes. The first uses the
+In the C<Address> class we define two subtypes. The first uses the
L<Locale::US> module to check the validity of a state. It accepts
either a state abbreviation of full name.
noting that an I<empty> array reference also satisfies this
constraint.
-Parameterizable type constraints (or "container types), such as
+Parameterizable type constraints (or "container types"), such as
C<ArrayRef[`a]>, can be made more specific with a type parameter. In
fact, we can arbitrarily nest these types, producing something like
C<HashRef[ArrayRef[Int]]>. However, you can also just use the type by
sub BUILD {
my ( $self, $params ) = @_;
- if ( $self->employees ) {
- foreach my $employee ( @{ $self->employees } ) {
- $employee->company($self);
- }
+ foreach my $employee ( @{ $self->employees || [] } ) {
+ $employee->employer($self);
}
}
-The C<BUILD> method is executed after type constraints are checked, so
-it is safe to assume that C<< $self->employees >> will return an array
-reference, and that the elements of that array will be C<Employee>
-objects.
+The C<BUILD> method is executed after type constraints are checked, so it is
+safe to assume that if C<< $self->employees >> has a value, it will be an
+array reference, and that the elements of that array reference will be
+C<Employee> objects.
We also want to make sure that whenever the C<employees> attribute for
a C<Company> is changed, we also update the C<employer> for each
after 'employees' => sub {
my ( $self, $employees ) = @_;
- if ($employees) {
- foreach my $employee ( @{$employees} ) {
- $employee->company($self);
- }
+ foreach my $employee ( @{ $employees || [] } ) {
+ $employee->employer($self);
}
};
-Again, as with the C<BUILD> method, we know that the type constraint
-check has already happened, so we can just check for definedness on the
-C<$employees> argument.
+Again, as with the C<BUILD> method, we know that the type constraint check has
+already happened, so we know that if C<$employees> is defined it will contain
+an array reference of C<Employee> objects..
-The B<Person> class does have demonstrate anything new. It has several
+The B<Person> class does not really demonstrate anything new. It has several
C<required> attributes. It also has a C<predicate> method, which we
first used in L<recipe 3|Moose::Cookbook::Basics::Recipe3>.
parameters that were passed to the method.
A more detailed example of usage can be found in
-F<t/000_recipes/004_recipe.t>.
+F<t/000_recipes/moose_cookbook_basics_recipe4.t>.
=head1 CONCLUSION
=head1 COPYRIGHT AND LICENSE
-Copyright 2006-2009 by Infinity Interactive, Inc.
+Copyright 2006-2010 by Infinity Interactive, Inc.
L<http://www.iinteractive.com>
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.
+=begin testing
+
+{
+ package Company;
+
+ sub get_employee_count { scalar @{(shift)->employees} }
+}
+
+use Scalar::Util 'isweak';
+
+my $ii;
+ok ! exception {
+ $ii = Company->new(
+ {
+ name => 'Infinity Interactive',
+ address => Address->new(
+ street => '565 Plandome Rd., Suite 307',
+ city => 'Manhasset',
+ state => 'NY',
+ zip_code => '11030'
+ ),
+ employees => [
+ Employee->new(
+ first_name => 'Jeremy',
+ last_name => 'Shao',
+ title => 'President / Senior Consultant',
+ address =>
+ Address->new( city => 'Manhasset', state => 'NY' )
+ ),
+ Employee->new(
+ first_name => 'Tommy',
+ last_name => 'Lee',
+ title => 'Vice President / Senior Developer',
+ address =>
+ Address->new( city => 'New York', state => 'NY' )
+ ),
+ Employee->new(
+ first_name => 'Stevan',
+ middle_initial => 'C',
+ last_name => 'Little',
+ title => 'Senior Developer',
+ address =>
+ Address->new( city => 'Madison', state => 'CT' )
+ ),
+ ]
+ }
+ );
+},
+'... created the entire company successfully';
+isa_ok( $ii, 'Company' );
+
+is( $ii->name, 'Infinity Interactive',
+ '... got the right name for the company' );
+
+isa_ok( $ii->address, 'Address' );
+is( $ii->address->street, '565 Plandome Rd., Suite 307',
+ '... got the right street address' );
+is( $ii->address->city, 'Manhasset', '... got the right city' );
+is( $ii->address->state, 'NY', '... got the right state' );
+is( $ii->address->zip_code, 11030, '... got the zip code' );
+
+is( $ii->get_employee_count, 3, '... got the right employee count' );
+
+# employee #1
+
+isa_ok( $ii->employees->[0], 'Employee' );
+isa_ok( $ii->employees->[0], 'Person' );
+
+is( $ii->employees->[0]->first_name, 'Jeremy',
+ '... got the right first name' );
+is( $ii->employees->[0]->last_name, 'Shao', '... got the right last name' );
+ok( !$ii->employees->[0]->has_middle_initial, '... no middle initial' );
+is( $ii->employees->[0]->middle_initial, undef,
+ '... got the right middle initial value' );
+is( $ii->employees->[0]->full_name,
+ 'Jeremy Shao, President / Senior Consultant',
+ '... got the right full name' );
+is( $ii->employees->[0]->title, 'President / Senior Consultant',
+ '... got the right title' );
+is( $ii->employees->[0]->employer, $ii, '... got the right company' );
+ok( isweak( $ii->employees->[0]->{employer} ),
+ '... the company is a weak-ref' );
+
+isa_ok( $ii->employees->[0]->address, 'Address' );
+is( $ii->employees->[0]->address->city, 'Manhasset',
+ '... got the right city' );
+is( $ii->employees->[0]->address->state, 'NY', '... got the right state' );
+
+# employee #2
+
+isa_ok( $ii->employees->[1], 'Employee' );
+isa_ok( $ii->employees->[1], 'Person' );
+
+is( $ii->employees->[1]->first_name, 'Tommy',
+ '... got the right first name' );
+is( $ii->employees->[1]->last_name, 'Lee', '... got the right last name' );
+ok( !$ii->employees->[1]->has_middle_initial, '... no middle initial' );
+is( $ii->employees->[1]->middle_initial, undef,
+ '... got the right middle initial value' );
+is( $ii->employees->[1]->full_name,
+ 'Tommy Lee, Vice President / Senior Developer',
+ '... got the right full name' );
+is( $ii->employees->[1]->title, 'Vice President / Senior Developer',
+ '... got the right title' );
+is( $ii->employees->[1]->employer, $ii, '... got the right company' );
+ok( isweak( $ii->employees->[1]->{employer} ),
+ '... the company is a weak-ref' );
+
+isa_ok( $ii->employees->[1]->address, 'Address' );
+is( $ii->employees->[1]->address->city, 'New York',
+ '... got the right city' );
+is( $ii->employees->[1]->address->state, 'NY', '... got the right state' );
+
+# employee #3
+
+isa_ok( $ii->employees->[2], 'Employee' );
+isa_ok( $ii->employees->[2], 'Person' );
+
+is( $ii->employees->[2]->first_name, 'Stevan',
+ '... got the right first name' );
+is( $ii->employees->[2]->last_name, 'Little', '... got the right last name' );
+ok( $ii->employees->[2]->has_middle_initial, '... got middle initial' );
+is( $ii->employees->[2]->middle_initial, 'C',
+ '... got the right middle initial value' );
+is( $ii->employees->[2]->full_name, 'Stevan C. Little, Senior Developer',
+ '... got the right full name' );
+is( $ii->employees->[2]->title, 'Senior Developer',
+ '... got the right title' );
+is( $ii->employees->[2]->employer, $ii, '... got the right company' );
+ok( isweak( $ii->employees->[2]->{employer} ),
+ '... the company is a weak-ref' );
+
+isa_ok( $ii->employees->[2]->address, 'Address' );
+is( $ii->employees->[2]->address->city, 'Madison', '... got the right city' );
+is( $ii->employees->[2]->address->state, 'CT', '... got the right state' );
+
+# create new company
+
+my $new_company
+ = Company->new( name => 'Infinity Interactive International' );
+isa_ok( $new_company, 'Company' );
+
+my $ii_employees = $ii->employees;
+foreach my $employee (@$ii_employees) {
+ is( $employee->employer, $ii, '... has the ii company' );
+}
+
+$new_company->employees($ii_employees);
+
+foreach my $employee ( @{ $new_company->employees } ) {
+ is( $employee->employer, $new_company,
+ '... has the different company now' );
+}
+
+## check some error conditions for the subtypes
+
+ok exception {
+ Address->new( street => {} ),;
+},
+'... we die correctly with bad args';
+
+ok exception {
+ Address->new( city => {} ),;
+},
+'... we die correctly with bad args';
+
+ok exception {
+ Address->new( state => 'British Columbia' ),;
+},
+'... we die correctly with bad args';
+
+ok ! exception {
+ Address->new( state => 'Connecticut' ),;
+},
+'... we live correctly with good args';
+
+ok exception {
+ Address->new( zip_code => 'AF5J6$' ),;
+},
+'... we die correctly with bad args';
+
+ok ! exception {
+ Address->new( zip_code => '06443' ),;
+},
+'... we live correctly with good args';
+
+ok exception {
+ Company->new(),;
+},
+'... we die correctly without good args';
+
+ok ! exception {
+ Company->new( name => 'Foo' ),;
+},
+'... we live correctly without good args';
+
+ok exception {
+ Company->new( name => 'Foo', employees => [ Person->new ] ),;
+},
+'... we die correctly with good args';
+
+ok ! exception {
+ Company->new( name => 'Foo', employees => [] ),;
+},
+'... we live correctly with good args';
+
+=end testing
+
=cut
projects / gitmo/Moose.git / blobdiff