diff --git a/src/test/java/ch/usi/inf/sa4/sanmarinoes/smarthut/controller/DeviceControllerTests.java b/src/test/java/ch/usi/inf/sa4/sanmarinoes/smarthut/controller/DeviceControllerTests.java
new file mode 100644
index 0000000..48be44a
--- /dev/null
+++ b/src/test/java/ch/usi/inf/sa4/sanmarinoes/smarthut/controller/DeviceControllerTests.java
@@ -0,0 +1,124 @@
+package ch.usi.inf.sa4.sanmarinoes.smarthut.controller;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+import static org.mockito.Mockito.*;
+
+import ch.usi.inf.sa4.sanmarinoes.smarthut.dto.DeviceSaveRequest;
+import ch.usi.inf.sa4.sanmarinoes.smarthut.error.BadDataException;
+import ch.usi.inf.sa4.sanmarinoes.smarthut.error.NotFoundException;
+import ch.usi.inf.sa4.sanmarinoes.smarthut.models.*;
+import ch.usi.inf.sa4.sanmarinoes.smarthut.service.DeviceService;
+import java.security.Principal;
+import java.util.List;
+import java.util.Optional;
+import lombok.SneakyThrows;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+import org.springframework.security.test.context.support.WithMockUser;
+
+@ExtendWith(MockitoExtension.class)
+@WithMockUser(username = "user")
+public class DeviceControllerTests {
+    @InjectMocks private DeviceController deviceController;
+
+    @Mock private DeviceService deviceService;
+    @Mock private DeviceRepository<Device> deviceRepository;
+    @Mock private RoomRepository roomRepository;
+    @Mock private Principal mockPrincipal;
+
+    private User user;
+    private Room room;
+
+    public DeviceControllerTests() {
+        room = new Room();
+        room.setId(1L);
+
+        user = new User();
+        user.setId(1L);
+        user.setName("user");
+    }
+
+    @DisplayName("check update device")
+    @Test
+    public void updateDeviceRepositoryTest() {
+        DeviceSaveRequest dto = new DeviceSaveRequest();
+        dto.setId(3L);
+        dto.setName("dto");
+        dto.setRoomId(room.getId());
+
+        when(deviceRepository.findByIdAndUsername(dto.getId(), mockPrincipal.getName()))
+                .thenReturn(Optional.empty());
+
+        assertThatThrownBy(() -> deviceController.update(dto, mockPrincipal))
+                .isInstanceOf(NotFoundException.class);
+    }
+
+    @DisplayName("check update device")
+    @Test
+    public void updateRoomRepositoryTest() {
+        DeviceSaveRequest dto = new DeviceSaveRequest();
+        dto.setId(3L);
+        dto.setName("dto");
+        dto.setRoomId(room.getId());
+
+        when(deviceRepository.findByIdAndUsername(dto.getId(), mockPrincipal.getName()))
+                .thenReturn(Optional.of(new RegularLight()));
+        when(roomRepository.findByIdAndUsername(room.getId(), mockPrincipal.getName()))
+                .thenReturn(Optional.empty());
+
+        assertThatThrownBy(() -> deviceController.update(dto, mockPrincipal))
+                .isInstanceOf(BadDataException.class);
+    }
+
+    @DisplayName("check update device")
+    @Test
+    @SneakyThrows({NotFoundException.class, BadDataException.class})
+    public void updateTest() {
+        DeviceSaveRequest dto = new DeviceSaveRequest();
+        dto.setId(3L);
+        dto.setName("dto");
+        dto.setRoomId(room.getId());
+
+        Device rl = new RegularLight();
+        rl.setRoomId(dto.getRoomId());
+        rl.setName(dto.getName());
+
+        when(deviceRepository.findByIdAndUsername(dto.getId(), mockPrincipal.getName()))
+                .thenReturn(Optional.of(rl));
+        when(roomRepository.findByIdAndUsername(room.getId(), mockPrincipal.getName()))
+                .thenReturn(Optional.of(room));
+        when(deviceService.saveAsOwner(rl, mockPrincipal.getName())).thenReturn(rl);
+
+        Device returned = deviceController.update(dto, mockPrincipal);
+        assertThat(returned.getRoomId()).isSameAs(rl.getRoomId());
+        assertThat(returned.getName()).isSameAs(rl.getName());
+    }
+
+    @DisplayName("check if list is empty")
+    @Test
+    @SneakyThrows(NotFoundException.class)
+    public void getAllEmptyTest() {
+        when(mockPrincipal.getName()).thenReturn("user");
+        List<Device> l = deviceController.getAll(user.getId(), mockPrincipal);
+        assertThat(l.isEmpty());
+    }
+
+    @DisplayName("check if list contains elements added")
+    @Test
+    @SneakyThrows(NotFoundException.class)
+    public void getAllTest() throws BadDataException {
+        when(mockPrincipal.getName()).thenReturn("user");
+        Device d1 = new RegularLight();
+        deviceService.saveAsOwner(d1, mockPrincipal.getName());
+        Device d2 = new SmartPlug();
+        deviceService.saveAsOwner(d2, mockPrincipal.getName());
+
+        assertThat(
+                deviceController.getAll(user.getId(), mockPrincipal).containsAll(List.of(d1, d2)));
+    }
+}