roi-theme/tests/Unit/Infrastructure/DI/DIContainerTest.php

<?php

declare(strict_types=1);

namespace ROITheme\Tests\Unit\Infrastructure\DI;

use PHPUnit\Framework\TestCase;
use ROITheme\Infrastructure\DI\DIContainer;
use RuntimeException;
use Exception;

/**
 * DI Container Test
 *
 * Tests for the Dependency Injection Container.
 *
 * @package ROITheme\Tests\Unit\Infrastructure\DI
 */
class DIContainerTest extends TestCase
{
    protected function setUp(): void
    {
        // Reset container before each test
        DIContainer::reset();
    }

    protected function tearDown(): void
    {
        // Reset container after each test
        DIContainer::reset();
    }

    /**
     * @test
     */
    public function it_should_return_singleton_instance(): void
    {
        $instance1 = DIContainer::getInstance();
        $instance2 = DIContainer::getInstance();

        $this->assertSame($instance1, $instance2, 'getInstance() should return the same instance');
    }

    /**
     * @test
     */
    public function it_should_prevent_cloning(): void
    {
        $this->expectError();
        $this->expectErrorMessage('Call to private');

        $container = DIContainer::getInstance();
        $clone = clone $container; // This should trigger an error
    }

    /**
     * @test
     */
    public function it_should_prevent_unserialization(): void
    {
        $this->expectException(Exception::class);
        $this->expectExceptionMessage('Cannot unserialize singleton');

        $container = DIContainer::getInstance();
        $serialized = serialize($container);
        unserialize($serialized);
    }

    /**
     * @test
     */
    public function it_should_register_and_retrieve_service(): void
    {
        $container = DIContainer::getInstance();
        $service = new \stdClass();
        $service->name = 'Test Service';

        $container->set('test_service', $service);

        $this->assertTrue($container->has('test_service'), 'Container should have the registered service');
        $this->assertSame($service, $container->get('test_service'), 'Should retrieve the same service instance');
    }

    /**
     * @test
     */
    public function it_should_return_null_for_non_existent_service(): void
    {
        $container = DIContainer::getInstance();

        $this->assertFalse($container->has('non_existent'), 'Container should not have non-existent service');
        $this->assertNull($container->get('non_existent'), 'Should return null for non-existent service');
    }

    /**
     * @test
     */
    public function it_should_throw_exception_for_unimplemented_component_repository(): void
    {
        $this->expectException(RuntimeException::class);
        $this->expectExceptionMessage('ComponentRepository not implemented yet');

        $container = DIContainer::getInstance();
        $container->getComponentRepository();
    }

    /**
     * @test
     */
    public function it_should_throw_exception_for_unimplemented_validation_service(): void
    {
        $this->expectException(RuntimeException::class);
        $this->expectExceptionMessage('ValidationService not implemented yet');

        $container = DIContainer::getInstance();
        $container->getValidationService();
    }

    /**
     * @test
     */
    public function it_should_throw_exception_for_unimplemented_cache_service(): void
    {
        $this->expectException(RuntimeException::class);
        $this->expectExceptionMessage('CacheService not implemented yet');

        $container = DIContainer::getInstance();
        $container->getCacheService();
    }

    /**
     * @test
     */
    public function it_should_reset_singleton_instance(): void
    {
        $instance1 = DIContainer::getInstance();
        $instance1->set('test', new \stdClass());

        DIContainer::reset();

        $instance2 = DIContainer::getInstance();

        $this->assertNotSame($instance1, $instance2, 'Reset should create a new instance');
        $this->assertFalse($instance2->has('test'), 'New instance should not have old services');
    }

    /**
     * @test
     */
    public function it_should_manage_multiple_services(): void
    {
        $container = DIContainer::getInstance();

        $service1 = new \stdClass();
        $service1->name = 'Service 1';

        $service2 = new \stdClass();
        $service2->name = 'Service 2';

        $service3 = new \stdClass();
        $service3->name = 'Service 3';

        $container->set('service1', $service1);
        $container->set('service2', $service2);
        $container->set('service3', $service3);

        $this->assertTrue($container->has('service1'));
        $this->assertTrue($container->has('service2'));
        $this->assertTrue($container->has('service3'));

        $this->assertSame($service1, $container->get('service1'));
        $this->assertSame($service2, $container->get('service2'));
        $this->assertSame($service3, $container->get('service3'));
    }
}