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https://github.com/danog/endtoend-test-psl.git
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32 lines
1.0 KiB
PHP
32 lines
1.0 KiB
PHP
<?php
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declare(strict_types=1);
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namespace Psl\Tests\Iter;
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use PHPUnit\Framework\TestCase;
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use Psl\Iter;
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final class MapKeysTest extends TestCase
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{
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/**
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* @dataProvider provideData
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*/
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public function testMapKeys(array $expected, iterable $iterable, callable $function): void
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{
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$result = Iter\map_keys($iterable, $function);
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static::assertSame($expected, Iter\to_array_with_keys($result));
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}
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public function provideData(): iterable
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{
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yield [[1, 2, 3], [1, 2, 3], static fn (int $k): int => $k];
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yield [[1, 2 => 2, 4 => 3], [1, 2, 3], static fn (int $k): int => $k * 2];
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yield [['0' => 1, '1' => 2, '2' => 3], [1, 2, 3], static fn (int $k): string => (string) $k];
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yield [[], [], static fn (int $k): string => (string) $k];
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yield [[], Iter\Iterator::create([]), static fn (int $k): string => (string) $k];
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yield [['0' => 1, '1' => 2], Iter\Iterator::create([1, 2]), static fn (int $k): string => (string) $k];
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}
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}
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