Of course, if you really want to test your objects, I'd recommend Test::Unit...

package Foo;

## BEGIN UNIT TESTING
use Test::Unit;

print "Testing Foo: ";
create_suite();
run_suite();
print "\n\n";

sub test_new {
  my $foo = Foo->new(name => 'Bar', baz => "Quux");

  # Test to make sure it was constructed correctly.
  assert($foo->get_name() eq 'Bar');
  assert($foo->get_baz() eq 'Quux');

  # My constructor should die if called with no args, check for that w
+ith this line:
  eval { my $foo = Foo->new() };
  assert($@);
}

sub test_method_1 {
  my $foo = Foo->new(name => 'Bar', baz => 'foon');
  assert($foo->gurglify(15));
  assert($foo->gurgled_amount() == 15);
}
[download]

... and so on. I typically use one single test for each method, along with a couple moe complicated tests that make sure the methods interact correctly. Run them all with perl Foo.pm every time you change anything within the file, and you can be assured that it all still works (as long as your tests are comprehensive...)