ap2i/tests/Unit/Service/Twig/ToBase64ExtensionTest.php

<?php

declare(strict_types=1);

namespace App\Tests\Unit\Service\Twig;

use App\Service\Twig\ToBase64Extension;
use PHPUnit\Framework\MockObject\MockObject;
use PHPUnit\Framework\TestCase;
use Twig\TwigFilter;

class ToBase64ExtensionTest extends TestCase
{
    private string $projectDir = '/test/project';

    private function getToBase64ExtensionMockFor(string $methodName): ToBase64Extension|MockObject
    {
        return $this->getMockBuilder(ToBase64Extension::class)
            ->setConstructorArgs([$this->projectDir])
            ->setMethodsExcept([$methodName])
            ->getMock();
    }

    /**
     * @see ToBase64Extension::getFilters()
     */
    public function testGetFilters(): void
    {
        $extension = $this->getToBase64ExtensionMockFor('getFilters');
        $filters = $extension->getFilters();

        $this->assertIsArray($filters);
        $this->assertCount(1, $filters);
        $this->assertInstanceOf(TwigFilter::class, $filters[0]);
        $this->assertSame('img_to_base64', $filters[0]->getName());

        // Test that the callable is correctly set
        $callable = $filters[0]->getCallable();
        $this->assertIsArray($callable);
        $this->assertSame($extension, $callable[0]);
        $this->assertSame('imgToBase64', $callable[1]);
    }

    /**
     * @see ToBase64Extension::imgToBase64()
     */
    public function testImgToBase64WithNonExistentFile(): void
    {
        $extension = $this->getToBase64ExtensionMockFor('imgToBase64');

        // Test with a non-existent file - this should return empty string without file operations
        $result = $extension->imgToBase64('non-existent-image.jpg');

        $this->assertSame('', $result);
    }
}