What is coverage (Devel::Cover) in Perl?

Coverage in Perl, specifically with Devel::Cover, refers to the measurement of how much of your code is executed when running your tests. It helps identify parts of your code that are not being tested, allowing developers to improve test coverage and increase the reliability of the software.

Devel::Cover provides insights into subroutine coverage, statement coverage, branch coverage, and more. This data is vital for ensuring that your tests are comprehensive and that edge cases are addressed.

# Example of using Devel::Cover in Perl

use Devel::Cover;

# Your Perl code goes here
sub example_function {
    my $value = shift;
    return $value * 2;
}

example_function(5);