use EntityManagerWrapper in HsBookingItemController to enable mocking

src/main/java/net/hostsharing/hsadminng/hs/booking/item/HsBookingItemController.java

@@ -10,6 +10,7 @@ import net.hostsharing.hsadminng.hs.booking.item.validators.HsBookingItemEntityV
 import net.hostsharing.hsadminng.hs.booking.project.HsBookingProjectRealEntity;
 import net.hostsharing.hsadminng.mapper.KeyValueMap;
 import net.hostsharing.hsadminng.mapper.Mapper;
+import net.hostsharing.hsadminng.persistence.EntityManagerWrapper;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.ResponseEntity;
 import org.springframework.transaction.annotation.Transactional;
@@ -37,8 +38,8 @@ public class HsBookingItemController implements HsBookingItemsApi {
     @Autowired
     private HsBookingItemRbacRepository bookingItemRepo;
 
-    @PersistenceContext
+    @Autowired
-    private EntityManager em;
+    private EntityManagerWrapper em;
 
     @Override
     @Transactional(readOnly = true)
@@ -141,7 +142,7 @@ public class HsBookingItemController implements HsBookingItemsApi {
     final BiConsumer<HsBookingItemRbacEntity, HsBookingItemResource> RBAC_ENTITY_TO_RESOURCE_POSTMAPPER = ITEM_TO_RESOURCE_POSTMAPPER::accept;
 
     final BiConsumer<HsBookingItemInsertResource, HsBookingItemRbacEntity> RESOURCE_TO_ENTITY_POSTMAPPER = (resource, entity) -> {
-        entity.setProject(em.getReference(HsBookingProjectRealEntity.class, resource.getProjectUuid()));
+        entity.setProject(em.find(HsBookingProjectRealEntity.class, resource.getProjectUuid()));
         entity.setValidity(toPostgresDateRange(LocalDate.now(), resource.getValidTo()));
         entity.putResources(KeyValueMap.from(resource.getResources()));
     };

src/test/java/net/hostsharing/hsadminng/hs/booking/item/HsBookingItemControllerRestTest.java

@@ -1,17 +1,20 @@
 package net.hostsharing.hsadminng.hs.booking.item;
 
+import net.hostsharing.hsadminng.config.JsonObjectMapperConfiguration;
 import net.hostsharing.hsadminng.context.Context;
 import net.hostsharing.hsadminng.hs.booking.project.HsBookingProjectRealEntity;
 import net.hostsharing.hsadminng.hs.booking.project.HsBookingProjectRealRepository;
 import net.hostsharing.hsadminng.mapper.Mapper;
+import net.hostsharing.hsadminng.persistence.EntityManagerWrapper;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Nested;
 import org.junit.jupiter.api.Test;
 import org.junit.runner.RunWith;
-import org.mockito.Mock;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
+import org.springframework.boot.test.context.TestConfiguration;
 import org.springframework.boot.test.mock.mockito.MockBean;
+import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Import;
 import org.springframework.http.MediaType;
 import org.springframework.test.context.junit4.SpringRunner;
@@ -28,13 +31,14 @@ import java.util.UUID;
 import static net.hostsharing.hsadminng.rbac.test.JsonMatcher.lenientlyEquals;
 import static org.hamcrest.Matchers.matchesRegex;
 import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.when;
 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.header;
 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;
 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
 
 @WebMvcTest(HsBookingItemController.class)
-@Import(Mapper.class)
+@Import({Mapper.class, JsonObjectMapperConfiguration.class})
 @RunWith(SpringRunner.class)
 class HsBookingItemControllerRestTest {
 
@@ -44,8 +48,12 @@ class HsBookingItemControllerRestTest {
     @MockBean
     Context contextMock;
 
-    @Mock
+    @Autowired
-    EntityManager em;
+    @SuppressWarnings("unused") // not used in test, but in controller class
+    Mapper mapper;
+
+    @MockBean
+    EntityManagerWrapper em;
 
     @MockBean
     EntityManagerFactory emf;
@@ -56,6 +64,16 @@ class HsBookingItemControllerRestTest {
     @MockBean
     HsBookingItemRbacRepository rbacBookingItemRepo;
 
+    @TestConfiguration
+    public static class TestConfig {
+
+        @Bean
+        public EntityManager entityManager() {
+            return mock(EntityManager.class);
+        }
+
+    }
+
     @BeforeEach
     void init() {
         when(emf.createEntityManager()).thenReturn(em);

src/test/java/net/hostsharing/hsadminng/hs/hosting/asset/HsHostingAssetControllerRestTest.java

@@ -63,10 +63,11 @@ public class HsHostingAssetControllerRestTest {
     Context contextMock;
 
     @Autowired
+    @SuppressWarnings("unused") // not used in test, but in controller class
     Mapper mapper;
 
     @MockBean
-    private EntityManagerWrapper em;
+    EntityManagerWrapper em;
 
     @MockBean
     EntityManagerFactory emf;
@@ -90,6 +91,7 @@ public class HsHostingAssetControllerRestTest {
         }
 
     }
+
     enum ListTestCases {
         CLOUD_SERVER(
                 List.of(