test: add unit tests for Imagick extension check

Create ConfigureCheckServiceTest with namespace-based function mocking
to test checkImagick() behavior. Uses DataProvider to test both scenarios:
extension loaded and not loaded. Mock allows testing independently of
actual Imagick installation state.

Signed-off-by: Vitor Mattos <1079143+vitormattos@users.noreply.github.com>

Author: vitormattos

tests/php/Unit/Service/Install/ConfigureCheckServiceTest.php

@@ -0,0 +1,104 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * SPDX-FileCopyrightText: 2024 LibreCode coop and contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+/**
+ * Mock extension_loaded in the ConfigureCheckService namespace to control its behavior in tests
+ */
+namespace OCA\Libresign\Service\Install;
+
+function extension_loaded(string $name): bool {
+	return \OCA\Libresign\Tests\Unit\Service\Install\ConfigureCheckServiceTest::$mockExtensionLoaded[$name] ?? \extension_loaded($name);
+}
+
+namespace OCA\Libresign\Tests\Unit\Service\Install;
+
+use OC\AppConfig;
+use OC\SystemConfig;
+use OCA\Libresign\Handler\CertificateEngine\CertificateEngineFactory;
+use OCA\Libresign\Handler\SignEngine\JSignPdfHandler;
+use OCA\Libresign\Helper\ConfigureCheckHelper;
+use OCA\Libresign\Helper\JavaHelper;
+use OCA\Libresign\Service\Install\ConfigureCheckService;
+use OCA\Libresign\Service\Install\SignSetupService;
+use OCP\App\IAppManager;
+use OCP\IAppConfig;
+use OCP\IURLGenerator;
+use PHPUnit\Framework\Attributes\DataProvider;
+use PHPUnit\Framework\MockObject\MockObject;
+use Psr\Log\LoggerInterface;
+
+final class ConfigureCheckServiceTest extends \OCA\Libresign\Tests\Unit\TestCase {
+	public static array $mockExtensionLoaded = [];
+
+	private IAppConfig $appConfig;
+	private SystemConfig&MockObject $systemConfig;
+	private AppConfig&MockObject $ocAppConfig;
+	private IAppManager&MockObject $appManager;
+	private IURLGenerator&MockObject $urlGenerator;
+	private JSignPdfHandler&MockObject $jSignPdfHandler;
+	private CertificateEngineFactory&MockObject $certificateEngineFactory;
+	private SignSetupService&MockObject $signSetupService;
+	private LoggerInterface&MockObject $logger;
+	private JavaHelper&MockObject $javaHelper;
+
+	public function setUp(): void {
+		self::$mockExtensionLoaded = [];
+		$this->appConfig = $this->getMockAppConfig();
+		$this->systemConfig = $this->createMock(SystemConfig::class);
+		$this->ocAppConfig = $this->createMock(AppConfig::class);
+		$this->appManager = $this->createMock(IAppManager::class);
+		$this->urlGenerator = $this->createMock(IURLGenerator::class);
+		$this->jSignPdfHandler = $this->createMock(JSignPdfHandler::class);
+		$this->certificateEngineFactory = $this->createMock(CertificateEngineFactory::class);
+		$this->signSetupService = $this->createMock(SignSetupService::class);
+		$this->logger = $this->createMock(LoggerInterface::class);
+		$this->javaHelper = $this->createMock(JavaHelper::class);
+	}
+
+	public function tearDown(): void {
+		self::$mockExtensionLoaded = [];
+	}
+
+	private function getInstance(): ConfigureCheckService {
+		return new ConfigureCheckService(
+			$this->appConfig,
+			$this->systemConfig,
+			$this->ocAppConfig,
+			$this->appManager,
+			$this->urlGenerator,
+			$this->jSignPdfHandler,
+			$this->certificateEngineFactory,
+			$this->signSetupService,
+			$this->logger,
+			$this->javaHelper,
+		);
+	}
+
+	public static function providerCheckExtension(): array {
+		return [
+			'extension not loaded' => ['imagick', false, 1],
+			'extension loaded' => ['imagick', true, 0],
+		];
+	}
+
+	#[DataProvider('providerCheckExtension')]
+	public function testCheckExtension(string $extension, bool $extensionLoaded, int $expectedCount): void {
+		self::$mockExtensionLoaded[$extension] = $extensionLoaded;
+
+		$service = $this->getInstance();
+		$result = $service->checkImagick();
+
+		$this->assertIsArray($result);
+		$this->assertCount($expectedCount, $result);
+
+		if ($expectedCount > 0) {
+			$this->assertInstanceOf(ConfigureCheckHelper::class, $result[0]);
+			$this->assertEquals($extension, $result[0]->getResource());
+		}
+	}
+}