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|
#!/usr/bin/perl -w
use strict;
use Test::More 'no_plan';
use Test::Fatal;
$| = 1;
# =begin testing SETUP
{
package BankAccount;
use Moose;
has 'balance' => ( isa => 'Int', is => 'rw', default => 0 );
sub deposit {
my ( $self, $amount ) = @_;
$self->balance( $self->balance + $amount );
}
sub withdraw {
my ( $self, $amount ) = @_;
my $current_balance = $self->balance();
( $current_balance >= $amount )
|| confess "Account overdrawn";
$self->balance( $current_balance - $amount );
}
package CheckingAccount;
use Moose;
extends 'BankAccount';
has 'overdraft_account' => ( isa => 'BankAccount', is => 'rw' );
before 'withdraw' => sub {
my ( $self, $amount ) = @_;
my $overdraft_amount = $amount - $self->balance();
if ( $self->overdraft_account && $overdraft_amount > 0 ) {
$self->overdraft_account->withdraw($overdraft_amount);
$self->deposit($overdraft_amount);
}
};
}
# =begin testing
{
my $savings_account;
{
$savings_account = BankAccount->new( balance => 250 );
isa_ok( $savings_account, 'BankAccount' );
is( $savings_account->balance, 250, '... got the right savings balance' );
is(
exception {
$savings_account->withdraw(50);
},
undef,
'... withdrew from savings successfully'
);
is( $savings_account->balance, 200,
'... got the right savings balance after withdrawal' );
$savings_account->deposit(150);
is( $savings_account->balance, 350,
'... got the right savings balance after deposit' );
}
{
my $checking_account = CheckingAccount->new(
balance => 100,
overdraft_account => $savings_account
);
isa_ok( $checking_account, 'CheckingAccount' );
isa_ok( $checking_account, 'BankAccount' );
is( $checking_account->overdraft_account, $savings_account,
'... got the right overdraft account' );
is( $checking_account->balance, 100,
'... got the right checkings balance' );
is(
exception {
$checking_account->withdraw(50);
},
undef,
'... withdrew from checking successfully'
);
is( $checking_account->balance, 50,
'... got the right checkings balance after withdrawal' );
is( $savings_account->balance, 350,
'... got the right savings balance after checking withdrawal (no overdraft)'
);
is(
exception {
$checking_account->withdraw(200);
},
undef,
'... withdrew from checking successfully'
);
is( $checking_account->balance, 0,
'... got the right checkings balance after withdrawal' );
is( $savings_account->balance, 200,
'... got the right savings balance after overdraft withdrawal' );
}
{
my $checking_account = CheckingAccount->new(
balance => 100
# no overdraft account
);
isa_ok( $checking_account, 'CheckingAccount' );
isa_ok( $checking_account, 'BankAccount' );
is( $checking_account->overdraft_account, undef,
'... no overdraft account' );
is( $checking_account->balance, 100,
'... got the right checkings balance' );
is(
exception {
$checking_account->withdraw(50);
},
undef,
'... withdrew from checking successfully'
);
is( $checking_account->balance, 50,
'... got the right checkings balance after withdrawal' );
isnt(
exception {
$checking_account->withdraw(200);
},
undef,
'... withdrawal failed due to attempted overdraft'
);
is( $checking_account->balance, 50,
'... got the right checkings balance after withdrawal failure' );
}
}
1;
|
