test: refactor: isset() tests
test: refactor: isset() tests

Separete Arrange, Act, and Assert.

samsonasik/CodeIgniter4,lonnieezell/CodeIgniter4,lonnieezell/CodeIgniter4,bcit-ci/CodeIgniter4,bcit-ci/CodeIgniter4,lonnieezell/CodeIgniter4,lonnieezell/CodeIgniter4,samsonasik/CodeIgniter4,samsonasik/CodeIgniter4,samsonasik/CodeIgniter4,kenjis/CodeIgniter4,bcit-ci/CodeIgniter4,kenjis/CodeIgniter4,samsonasik/CodeIgniter4,kenjis/CodeIgniter4,kenjis/CodeIgniter4,lonnieezell/CodeIgniter4,bcit-ci/CodeIgniter4,lonnieezell/CodeIgniter4,bcit-ci/CodeIgniter4,samsonasik/CodeIgniter4,kenjis/CodeIgniter4