runx/tests/Functional/Infrastructure/Config/JsonConfigProviderTest.php

<?php

declare(strict_types=1);

namespace Tests\Functional\Infrastructure\Config;

use CuyZ\Valinor\Mapper\TreeMapper;
use CuyZ\Valinor\MapperBuilder;
use PHPUnit\Framework\Attributes\CoversClass;
use PHPUnit\Framework\TestCase;
use Runx\Infrastructure\Config\Config;
use Runx\Infrastructure\Config\Provider\JsonConfigProvider;

#[CoversClass(JsonConfigProvider::class)]
class JsonConfigProviderTest extends TestCase
{
    private string $tmpFile;
    private TreeMapper $mapper;

    protected function setUp(): void
    {
        $this->mapper = (new MapperBuilder())->mapper();

        $this->tmpFile = tempnam(sys_get_temp_dir(), 'cfg_');
        $configExample = __DIR__ . '/../../../../config/config.example.json';

        if (false === $this->tmpFile) {
            $this->markTestSkipped('Unable to create temporary config file.');
        }

        copy($configExample, $this->tmpFile);
    }

    protected function tearDown(): void
    {
        if (is_file($this->tmpFile)) {
            unlink($this->tmpFile);
        }
    }

    public function testThrowsIfFileNotReadable(): void
    {
        $provider = new JsonConfigProvider('/non/existent/path.json', $this->mapper);

        $this->expectException(\RuntimeException::class);
        $this->expectExceptionMessage('not found');

        $provider->getConfig();
    }

    public function testThrowsOnMappingError(): void
    {
        file_put_contents($this->tmpFile, '{"foo":"bar"}');

        $provider = new JsonConfigProvider($this->tmpFile, $this->mapper);

        $this->expectException(\RuntimeException::class);
        $this->expectExceptionMessage('Failed to map');

        $provider->getConfig();
    }

    public function testReturnsConfigOnSuccess(): void
    {
        $provider = new JsonConfigProvider($this->tmpFile, $this->mapper);
        $config = $provider->getConfig();

        self::assertInstanceOf(Config::class, $config);
    }
}