62 lines
1.5 KiB
PHP
62 lines
1.5 KiB
PHP
<?php
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declare(strict_types=1);
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namespace Tez\Utils\Tests\Arr;
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use PHPUnit\Framework\TestCase;
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use Tez\Utils\Arr\MapWithKeys;
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final class MapWithKeysTest extends TestCase
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{
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public function testTransformsKeysAndValues(): void
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{
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/** @var list<array{id: int, name: string}> $users */
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$users = [
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['id' => 1, 'name' => 'Alice'],
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['id' => 2, 'name' => 'Bob'],
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];
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$result = MapWithKeys::map($users, function (mixed $u) {
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/** @var array{id: int, name: string} $u */
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return [$u['id'] => $u['name']];
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});
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self::assertSame([1 => 'Alice', 2 => 'Bob'], $result);
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}
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public function testSwapsKeyAndValue(): void
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{
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$result = MapWithKeys::map(['a' => 1, 'b' => 2], function (mixed $v, int|string $k) {
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/** @var int $v */
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return [$v => $k];
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});
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self::assertSame([1 => 'a', 2 => 'b'], $result);
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}
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public function testLastWinsOnDuplicateKey(): void
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{
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$result = MapWithKeys::map([1, 2, 3], fn($v) => ['key' => $v]);
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self::assertSame(['key' => 3], $result);
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}
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public function testEmptyInputReturnsEmpty(): void
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{
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self::assertSame([], MapWithKeys::map([], fn($v) => ['x' => $v]));
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}
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public function testReceivesOriginalKey(): void
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{
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$received = [];
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MapWithKeys::map(['x' => 10, 'y' => 20], function ($v, $k) use (&$received) {
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$received[] = $k;
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return [$k => $v];
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});
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self::assertSame(['x', 'y'], $received);
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}
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}
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