PestPHP `isBetween()` Expectation

This week in my free time, I've been working on a new Expectation for PestPHP which allows you to check whether a value, is between 2 other values.

The Expectation works with int, float and DateTime types, and can be used like so:

// Int
expect(2)->toBeBetween(1, 3);

// Float
expect(1.5)->toBetween(1, 2);

// DateTime
expect(new DateTime('2023-09-22'))->toBeBetween(new DateTime('2023-09-21'), new DateTime('2023-09-23'));

Now if you've used PestPHP, you may know about the not function, well, you can also use isBetween() with that too, to ensure a value is not between 2 values:

// Int
expect(4)->not->toBeBetween(1, 3);

// Float
expect(2.1)->not->toBetween(1.5, 1.75);

// DateTime
expect(new DateTime('2023-09-20'))->not->toBeBetween(new DateTime('2023-09-21'), new DateTime('2023-09-23'));

I really enjoyed working on this Expectation, you can view the merged Pull Request on GitHub here. It will be released in v2.20.

UPDATE: You can now find this Expectation in the PestPHP Docs!