is_countable

<?php     public function toHaveCount(int $count, string $message = ''): self

    {

        if (! is_countable($this->value) && ! is_iterable($this->value)) {

            InvalidExpectationValue::expected('countable|iterable');

        }

<?php     public function toHaveSameSize(Countable|iterable $expected, string $message = ''): self

    {

        if (! is_countable($this->value) && ! is_iterable($this->value)) {

            InvalidExpectationValue::expected('countable|iterable');

        }

<?php                 $message = str_replace(self::UNDEFINED_METHOD, 'Call to undefined method ', $message);



                if (class_exists((string) $class) && (is_countable(class_parents($class)) ? count(class_parents($class)) : 0) > 0 && array_values(class_parents($class))[0] === TestCase::class) { // @phpstan-ignore-line

                    $message .= '. Did you forget to use the [uses()] function? Read more at: https://pestphp.com/docs/configuring-tests';

                }