<?php

declare(strict_types=1);

namespace Recruiter\Array\Tests;

use PHPUnit\Framework\TestCase;

use function Recruiter\Array\array_map;

use Recruiter\Array\Range;

class ArrayMapTest extends TestCase

{

public function testMap(): void

{

$this->assertSame(

[2, 4, 6],

array_map([1, 2, 3], fn ($value): int|float => $value * 2),

);

}

public function testIterator(): void

{

$this->assertSame(

[2, 4, 6],

array_map(new Range(1, 4), fn ($value): int|float => $value * 2),

);

}

public function testIdentity(): void

{

$this->assertSame([], array_map([]));

$this->assertSame([1, 2, 3], array_map([1, 2, 3]));

}

public function testIdentityPreservingKeys(): void

{

$array = ['1' => 1, '2' => 2, '3' => 3];

$this->assertSame($array, array_map($array, null, true));

$this->assertNotSame($array, array_map($array, null, false));

}

public function testIndexesAreLost(): void

{

$this->assertSame([1, 2, 3], array_map(['1' => 1, '2' => 2, '3' => 3]));

}

public function testIndexesArePassedAsParameters(): void

{

$returnKeys = (fn ($value, $key) => $key);

$this->assertSame(

['one', 'two', 'three'],

array_map(['one' => 1, 'two' => 2, 'three' => 3], $returnKeys),

);

}

}