How do you test code that uses immutability in Moose?

Testing code that utilizes immutability with Moose can be approached using specific strategies to ensure that your classes behave as expected. Immortal objects in Moose reduce the chances of unexpected state changes, making your code easier to test. Here's an example of how to test immutable classes in Moose.

package MyClass; use Moose; # Define an immutable class __PACKAGE__->meta->make_immutable; has 'name' => ( is => 'ro', isa => 'Str', required => 1, ); sub greet { my $self = shift; return "Hello, " . $self->name; } # Test the immutable class package main; use Test::More; my $obj = MyClass->new(name => 'Alice'); is($obj->greet(), 'Hello, Alice', 'greet() should return correct greeting'); done_testing();

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