endtoend-test-psl/tests/Psl/Arr/MergeTest.php

<?php

declare(strict_types=1);

namespace Psl\Tests\Arr;

use PHPUnit\Framework\TestCase;
use Psl\Arr;
use Psl\Collection;

/**
 * @covers \Psl\Arr\merge
 */
class MergeTest extends TestCase
{
    /**
     * @dataProvider provideData
     */
    public function testMerge(array $expected, iterable $iterable, iterable ...$iterables): void
    {
        self::assertSame($expected, Arr\merge($iterable, ...$iterables));
    }

    public function provideData(): array
    {
        return [
            [
                ['a' => 'b', 'b' => 'c', 'c' => 'd', 'd' => 'e'],

                new Collection\Map(['a' => 'foo', 'b' => 'bar']),
                ['a' => 'b'],
                new Collection\ImmMap(['b' => 'c', 'c' => 'd']),
                (fn () => yield 'd' => 'baz')(),
                (fn () => yield 'd' => 'e')(),
            ],

            [
                [1, 2, 9, 8],
                [0 => 1, 1 => 2],
                [2 => 9, 3 => 8],
            ],
        ];
    }
}