test(handler): stub CrlRevocationChecker::validate() in OpenSslHandlerTest

Same root cause as AEngineHandlerTest: the CrlRevocationChecker mock
returned null, causing 7 tests to trigger "Undefined array key 'status'"
warnings in AEngineHandler::addCrlValidationInfo().
Stubbing validate() to return ['status' => CrlValidationStatus::VALID]
satisfies the return-type contract and eliminates the warnings.

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

Author: vitormattos

tests/php/Unit/Handler/CertificateEngine/OpenSslHandlerTest.php

@@ -10,6 +10,7 @@
  */
 
 use OCA\Libresign\Db\CrlMapper;
+use OCA\Libresign\Enum\CrlValidationStatus;
 use OCA\Libresign\Exception\EmptyCertificateException;
 use OCA\Libresign\Exception\InvalidPasswordException;
 use OCA\Libresign\Exception\LibresignException;
@@ -26,6 +27,7 @@
 use OCP\ITempManager;
 use OCP\IURLGenerator;
 use PHPUnit\Framework\Attributes\DataProvider;
+use PHPUnit\Framework\MockObject\MockObject;
 use Psr\Log\LoggerInterface;
 
 final class OpenSslHandlerTest extends \OCA\Libresign\Tests\Unit\TestCase {
@@ -41,7 +43,7 @@ final class OpenSslHandlerTest extends \OCA\Libresign\Tests\Unit\TestCase {
 	private CrlMapper $crlMapper;
 	private LoggerInterface $logger;
 	private SubjectAlternativeNameService $subjectAlternativeNameService;
-	private CrlRevocationChecker $crlRevocationChecker;
+	private CrlRevocationChecker&MockObject $crlRevocationChecker;
 	public function setUp(): void {
 		$this->config = \OCP\Server::get(IConfig::class);
 		$this->appConfig = $this->getMockAppConfigWithReset();
@@ -56,6 +58,7 @@ public function setUp(): void {
 		$this->logger = \OCP\Server::get(LoggerInterface::class);
 		$this->subjectAlternativeNameService = \OCP\Server::get(SubjectAlternativeNameService::class);
 		$this->crlRevocationChecker = $this->createMock(CrlRevocationChecker::class);
+		$this->crlRevocationChecker->method('validate')->willReturn(['status' => CrlValidationStatus::VALID]);
 		$this->caIdentifierService->generateCaId('openssl');
 	}