71 lines
1.8 KiB
PHP
71 lines
1.8 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\Partition;
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final class PartitionTest extends TestCase
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{
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public function testSplitsIntoPassAndFail(): void
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{
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/** @var list<int> $numbers */
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$numbers = [1, 2, 3, 4, 5, 6];
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[$even, $odd] = Partition::by($numbers, fn($n) => $n % 2 === 0);
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self::assertSame([2, 4, 6], $even);
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self::assertSame([1, 3, 5], $odd);
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}
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public function testAllPassReturnsEmptyFail(): void
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{
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[$pass, $fail] = Partition::by([1, 2, 3], fn() => true);
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self::assertSame([1, 2, 3], $pass);
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self::assertSame([], $fail);
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}
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public function testAllFailReturnsEmptyPass(): void
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{
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[$pass, $fail] = Partition::by([1, 2, 3], fn() => false);
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self::assertSame([], $pass);
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self::assertSame([1, 2, 3], $fail);
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}
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public function testEmptyArrayReturnsTwoEmptyLists(): void
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{
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[$pass, $fail] = Partition::by([], fn() => true);
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self::assertSame([], $pass);
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self::assertSame([], $fail);
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}
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public function testWorksWithAssocArrayItems(): void
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{
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$users = [
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['name' => 'Alice', 'active' => true],
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['name' => 'Bob', 'active' => false],
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['name' => 'Carol', 'active' => true],
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];
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[$active, $inactive] = Partition::by($users, fn($u) => $u['active']);
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self::assertCount(2, $active);
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self::assertCount(1, $inactive);
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self::assertSame('Alice', $active[0]['name']);
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self::assertSame('Carol', $active[1]['name']);
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}
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public function testResultIsReindexed(): void
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{
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[$pass, $fail] = Partition::by([10, 20, 30, 40], fn($n) => $n > 15);
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self::assertSame(0, array_key_first($pass));
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self::assertSame(0, array_key_first($fail));
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}
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}
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