assertArrayContent.php

<?php

    /**
     * Recursively compare the content of an array, even if the elements, or nested elements, are out of order
     */
    function assertArrayContent(array $expected, array $actual, $message = ''): void
    {
        ($self = function (array $expected, array $actual, $parentIndex = null) use (&$self, $message): bool {
            sort($expected);
            sort($actual);

            return array_reduce(array_keys($expected), function (bool $equals, $index) use (
                $expected, $actual, $self, $parentIndex, $message
            ): bool {
                $equals &= $expected[$index] === $actual[$index];
                $indexPath = $parentIndex === null ? $index : "$parentIndex.$index";

                if (!is_array($expected[$index]) && !$equals) {
                    $normalize = fn ($item): string => match ($type = gettype($expected[$index])) {
                        'object' => get_class($expected[$index]),
                        'integer', 'double' => (string) $expected[$index],
                        'boolean' => $expected[$index] ? 'TRUE' : 'FALSE',
                        default => strtoupper($type)
                    };

                    throw new ExpectationFailedException($message ?: sprintf(
                        'Expected value at "%s", "%s", does not match the given "%s".',
                        $indexPath, $normalize($expected[$index]), $normalize($actual[$index])
                    ));
                }

                return is_array($expected[$index]) ? $self($expected[$index], $actual[$index], $indexPath) : $equals;
            }, true);
        })($expected, $actual, $message);
    }