php-collection/tests/Unit/AbstractCollection/ClearTest.php at 6d26fd9f391b9001ce2d75b36e4125b6614aecbc · steevanb/php-collection · GitHub

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<?php

declare(strict_types=1);

namespace Steevanb\PhpCollection\Tests\Unit\AbstractCollection;

use PHPUnit\Framework\TestCase;

/** @covers \Steevanb\PhpCollection\AbstractCollection::clear */
final class ClearTest extends TestCase
{
    public function testEmpty(): void
    {
        $collection = new TestCollection();

        static::assertCount(0, $collection);

        $collection->clear();

        static::assertCount(0, $collection);

        $collection->callDoAdd(1);

        static::assertCount(1, $collection);
    }

    public function testOneItem(): void
    {
        $collection = new TestCollection([1]);

        static::assertCount(1, $collection);

        $collection->clear();

        static::assertCount(0, $collection);

        $collection->callDoAdd(2);

        static::assertCount(1, $collection);
    }

    public function testThreeItem(): void
    {
        $collection = new TestCollection([1, 2, 3]);

        static::assertCount(3, $collection);

        $collection->clear();

        static::assertCount(0, $collection);

        $collection->callDoAdd(4);

        static::assertCount(1, $collection);
    }
}