<?php

namespace Tests\Unit\Purchase;

use App\Domains\Purchase\Services\DniDistanceService;
use PHPUnit\Framework\Attributes\DataProvider;
use PHPUnit\Framework\TestCase;

class DniDistanceServiceTest extends TestCase
{
    /** @return iterable<string, array{string, string, int}> */
    public static function distances(): iterable
    {
        yield 'exact' => ['40123456', '40123456', 0];
        yield 'leading transposition' => ['40123456', '04123456', 1];
        yield 'trailing transposition' => ['40123456', '40123465', 1];
        yield 'single substitution' => ['40123456', '40123856', 1];
        yield 'substitution and transposition' => ['12345678', '12345087', 2];
        yield 'seven digits normalized with leading zero' => ['04123456', '4123456', 0];
        yield 'more than two edits' => ['40123456', '87654321', 7];
    }

    #[DataProvider('distances')]
    public function test_it_calculates_damerau_levenshtein_distance(
        string $left,
        string $right,
        int $expected,
    ): void {
        $this->assertSame($expected, (new DniDistanceService)->distance($left, $right));
    }
}