What are best practices for working with coverage (Devel::Cover)?

# Example usage of Devel::Cover in a Perl script

# Step 1: Install Devel::Cover if not already installed
# You can use CPAN or cpanm to install it
cpan Devel::Cover

# Step 2: Enable Devel::Cover in your Perl test script
use Test::More;
use Devel::Cover;

# Example test case
sub add {
    my ($a, $b) = @_;
    return $a + $b;
}

subtest 'Testing add function' => sub {
    is(add(1, 2), 3, '1 + 2 should return 3');
    is(add(-1, 1), 0, '-1 + 1 should return 0');
};

done_testing();

# Step 3: Run the tests with coverage
perl -MDevel::Cover your_test_script.pl

# Step 4: Generate coverage report
cover