How do you test code that uses tie and tied variables?

Tie and tied variables in Perl allow you to associate a variable with a package that handles the values assigned to it. Testing code that employs these features can be a bit tricky. Below is an example of how to properly test code that uses tied variables.


        # Example of using tie in Perl
        package MyTie;
        
        use Tie::Hash;

        # Create the tie function
        sub TIEHASH {
            my ($class) = @_;
            return bless {}, $class;
        }

        sub STORE {
            my ($self, $key, $value) = @_;
            print "Storing: $key => $value\n";
            $self->{$key} = $value;
        }

        sub FETCH {
            my ($self, $key) = @_;
            print "Fetching: $key\n";
            return $self->{$key};
        }

        # Main script
        use strict;
        use warnings;

        tie my %hash, 'MyTie';

        $hash{'foo'} = 'bar';  # This will call the STORE method
        print $hash{'foo'};     # This will call the FETCH method

How do you test code that uses tie and tied variables?

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How do you test code that uses tie and tied variables?

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