Split the street from the housenumber with a regex

Splitter.php

<?php

namespace Luna\Splitter;

class Splitter
{
    /**
     * Split the street from the number
     *
     * @param  string  $address
     * @return array
     */
    public static function splitAddress($address)
    {
        preg_match('/^(?P<address>\d*\D+[^A-Z]) (?P<number>[^a-z]?\D*\d+.*)$/', $address, $match);

        return $match;
    }
}

TestCase.php

<?php

namespace Tests;

use Luna\Splitter\Splitter;

class TestCase extends \Phpunit\Framework\TestCase
{
    /**
     * @test
     */
    public function addressesAreSplitCorrectly()
    {
        $testAddresses = [
            'Street 12' => [
                'address' => 'Street',
                'number' => '12'
            ],
            'Street 12A' => [
                'address' => 'Street',
                'number' => '12A'
            ],
            'Street 12 A' => [
                'address' => 'Street',
                'number' => '12 A'
            ],
            'Street A12' => [
                'address' => 'Street',
                'number' => 'A12'
            ],
            'Street A 12' => [
                'address' => 'Street',
                'number' => 'A 12'
            ],
            'Street A12 A14' => [
                'address' => 'Street',
                'number' => 'A12 A14'
            ],
            'Street 12 - 14' => [
                'address' => 'Street',
                'number' => '12 - 14'
            ],
            'Street A12 - A14' => [
                'address' => 'Street',
                'number' => 'A12 - A14'
            ],
            'Street A 12 - A 14' => [
                'address' => 'Street',
                'number' => 'A 12 - A 14'
            ],
            'Street 12A - 14A' => [
                'address' => 'Street',
                'number' => '12A - 14A'
            ],
            'Street 12 A - 14 A' => [
                'address' => 'Street',
                'number' => '12 A - 14 A'
            ],
            'Some long street name 12 34' => [
                'address' => 'Some long street name',
                'number' => '12 34'
            ],
            'Some long street name 12 - 34' => [
                'address' => 'Some long street name',
                'number' => '12 - 34'
            ],
            'Some long street name A12 - A34' => [
                'address' => 'Some long street name',
                'number' => 'A12 - A34'
            ],
            'Some long street name 12A' => [
                'address' => 'Some long street name',
                'number' => '12A'
            ]
        ];

        foreach ($testAddresses as $fullAddress => $splitAddress) {
            $address = Splitter::splitAddress($fullAddress);

            $this->assertEquals($splitAddress['address'], $address['address']);
            $this->assertEquals($splitAddress['number'], $address['number']);

            $address = Splitter::splitAddress('1st ' . $fullAddress);

            $this->assertEquals('1st ' . $splitAddress['address'], $address['address']);
            $this->assertEquals($splitAddress['number'], $address['number']);
        }
    }
}