test: add session service data provider coverage

Signed-off-by: Vitor Mattos <[email protected]>

Author: vitormattos

tests/php/Unit/Service/SessionServiceTest.php

@@ -0,0 +1,53 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OCA\Libresign\Tests\Unit\Service;
+
+/**
+ * SPDX-FileCopyrightText: 2026 LibreCode coop and contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+use OCA\Libresign\Service\SessionService;
+use OCP\IAppConfig;
+use OCP\ISession;
+use PHPUnit\Framework\Attributes\DataProvider;
+use PHPUnit\Framework\MockObject\MockObject;
+
+final class SessionServiceTest extends \OCA\Libresign\Tests\Unit\TestCase {
+	private ISession&MockObject $session;
+	private IAppConfig&MockObject $appConfig;
+
+	public function setUp(): void {
+		$this->session = $this->createMock(ISession::class);
+		$this->appConfig = $this->createMock(IAppConfig::class);
+	}
+
+	private function getService(): SessionService {
+		return new SessionService(
+			$this->session,
+			$this->appConfig,
+		);
+	}
+
+	#[DataProvider('providerGetSessionId')]
+	public function testGetSessionIdUsesUuidWhenAvailable(mixed $uuidInSession, string $sessionId, string $expected): void {
+		$this->session->method('get')
+			->with('libresign-uuid')
+			->willReturn($uuidInSession);
+		$this->session->method('getId')
+			->willReturn($sessionId);
+
+		$this->assertSame($expected, $this->getService()->getSessionId());
+	}
+
+	public static function providerGetSessionId(): array {
+		return [
+			'uuid string present' => ['54afbd0a-a065-4eaf-b611-48ec381b116a', 'session-123', '54afbd0a-a065-4eaf-b611-48ec381b116a'],
+			'uuid empty string' => ['', 'session-123', 'session-123'],
+			'uuid null' => [null, 'session-123', 'session-123'],
+			'uuid non-string' => [123, 'session-123', 'session-123'],
+		];
+	}
+}