<?php

declare(strict_types=1);

namespace Recruiter\Array\Tests;

use PHPUnit\Framework\TestCase;

use function Recruiter\Array\array_cartesian_product;

class ArrayCartesianProductTest extends TestCase

{

public function testArrayCartesianProduct(): void

{

$this->assertSame(

[[]],

array_cartesian_product([]),

);

$this->assertSame(

[[1, 2]],

array_cartesian_product([[1], [2]]),

);

$this->assertSame(

[[1]],

array_cartesian_product([[1]]),

);

$this->assertSame(

[[1, 2]],

array_cartesian_product([[1], [2]]),

);

$this->assertSame(

[[1, 2], [1, 3]],

array_cartesian_product([[1], [2, 3]]),

);

$this->assertSame(

[[1, 3], [1, 4], [2, 3], [2, 4]],

array_cartesian_product([[1, 2], [3, 4]]),

);

$this->assertSame(

[[1, 3, 5], [1, 3, 6], [1, 3, 7], [1, 3, 8],

[1, 4, 5], [1, 4, 6], [1, 4, 7], [1, 4, 8]],

array_cartesian_product([[1], [3, 4], [5, 6, 7, 8]]),

);

}

}