diff --git a/tests/Unit/Service/RestrictionServiceTest.php b/tests/Unit/Service/RestrictionServiceTest.php
new file mode 100644
index 0000000..baba3f3
--- /dev/null
+++ b/tests/Unit/Service/RestrictionServiceTest.php
@@ -0,0 +1,52 @@
+<?php
+
+namespace OCA\BigBlueButton\Tests\Unit\Service;
+
+use PHPUnit\Framework\TestCase;
+
+
+use OCA\BigBlueButton\Service\RestrictionService;
+use OCA\BigBlueButton\Db\Room;
+use OCA\BigBlueButton\Db\Restriction;
+use OCA\BigBlueButton\Db\RestrictionMapper;
+
+class RestrictionServiceTest extends TestCase {
+	protected $mapper;
+	protected $service;
+
+	public function setUp(): void {
+		$this->mapper = $this->createMock(RestrictionMapper::class);
+
+		$this->service = new RestrictionService($this->mapper);
+	}
+
+	public function testFindByGroupIds() {
+		$restriction0 = new Restriction();
+		$restriction0->setRoomTypes(\json_encode([Room::ACCESS_INTERNAL]));
+		$restriction0->setMaxParticipants(50);
+		$restriction0->setAllowRecording(false);
+
+		$restriction1 = new Restriction();
+		$restriction1->setRoomTypes(\json_encode([Room::ACCESS_INTERNAL, Room::ACCESS_INTERNAL_RESTRICTED]));
+		$restriction1->setMaxRooms(10);
+		$restriction1->setMaxParticipants(100);
+		$restriction1->setAllowRecording(true);
+
+		$this->mapper
+			->expects($this->once())
+			->method('findByGroupIds')
+			->willReturn([$restriction1]);
+
+		$this->mapper
+			->expects($this->once())
+			->method('findByGroupId')
+			->willReturn($restriction0);
+
+		$result = $this->service->findByGroupIds([]);
+
+		$this->assertEquals([Room::ACCESS_INTERNAL], \json_decode($result->getRoomTypes()));
+		$this->assertEquals(-1, $result->getMaxRooms());
+		$this->assertEquals(100, $result->getMaxParticipants());
+		$this->assertTrue($result->getAllowRecording());
+	}
+}