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   *  distributed with this work for additional information
   *  regarding copyright ownership.  The ASF licenses this file
   *  to you under the Apache License, Version 2.0 (the
   *  "License"); you may not use this file except in compliance
   *  with the License.  You may obtain a copy of the License at
   *
   *        http://www.apache.org/licenses/LICENSE-2.0
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   *  Unless required by applicable law or agreed to in writing,
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   *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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   *  specific language governing permissions and limitations
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  package org.apache.causeway.testdomain.persistence.jpa.entitylifecycle;
  
  import java.util.Objects;
  
  import jakarta.inject.Inject;
  
  import org.junit.jupiter.api.MethodOrderer;
  import org.junit.jupiter.api.Order;
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.TestMethodOrder;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  import org.springframework.boot.test.context.SpringBootTest;
  import org.springframework.test.annotation.Commit;
  import org.springframework.test.context.TestPropertySource;
  import org.springframework.transaction.annotation.Transactional;
  
  import org.apache.causeway.applib.services.repository.EntityState;
  import org.apache.causeway.applib.services.repository.RepositoryService;
  import org.apache.causeway.commons.internal.exceptions._Exceptions;
  import org.apache.causeway.core.config.presets.CausewayPresets;
  import org.apache.causeway.core.metamodel.object.ManagedObject;
  import org.apache.causeway.core.metamodel.object.MmEntityUtils;
  import org.apache.causeway.core.metamodel.objectmanager.ObjectManager;
  import org.apache.causeway.testdomain.jpa.conf.Configuration_usingJpa;
  import org.apache.causeway.testdomain.jpa.entities.JpaEntityGeneratedLongId;
  import org.apache.causeway.testdomain.util.kv.KVStoreForTesting;
  
  @SpringBootTest(
          classes = {
                  Configuration_usingJpa.class,
          },
          properties = {
                  "spring.datasource.url=jdbc:h2:mem:JpaGeneratedLongIdEntityLifecycleTest",
          })
  @Transactional
  @TestPropertySource(CausewayPresets.UseLog4j2Test)
  @TestMethodOrder(MethodOrderer.OrderAnnotation.class)
  //@DirtiesContext
  class JpaGeneratedLongIdEntityLifecycleTest {
  
      @Inject private RepositoryService repository;
      @Inject private ObjectManager objectManager;
      @Inject private KVStoreForTesting kvStore;
  
      @Test @Order(0) @Commit
      void cleanup_justInCase() {
          // cleanup just in case
          repository.removeAll(JpaEntityGeneratedLongId.class);
      }
  
      @Test @Order(1) @Commit
      void detached_shouldBeProperlyDetected() {
  
          var entity = objectManager.adapt(
                  repository.detachedEntity(new JpaEntityGeneratedLongId("test")));
  
          assertTrue(entity.objSpec().isEntity());
          assertEquals(
                  EntityState.TRANSIENT_OR_REMOVED,
                  MmEntityUtils.getEntityState(entity));
  
          setEntityRef(entity);
  
      }
  
      @Test @Order(2) @Commit
      void attached_shouldBeProperlyDetected() {
  
          var entity = getEntityRef();
  
          repository.persist(entity.getPojo());
  
          assertEquals(
                  EntityState.ATTACHED,
                  MmEntityUtils.getEntityState(entity));
          assertEquals(1, repository.allInstances(JpaEntityGeneratedLongId.class).size());
  
      }
  
      @Test @Order(3) @Commit
      void removed_shouldBeProperlyDetected() {
  
          // expected post-condition (after persist, and having entered a new transaction)
          assertEquals(
                  EntityState.DETACHED,
                  MmEntityUtils.getEntityState(getEntityRef()));
  
          var id = ((JpaEntityGeneratedLongId)getEntityRef().getPojo()).getId();
  
          var entity = objectManager.adapt(
                  repository.firstMatch(
                          JpaEntityGeneratedLongId.class,
                          entityPojo->Objects.equals(entityPojo.getId(), id))
                  .orElseThrow(_Exceptions::noSuchElement));
  
          // expected pre-condition (before removal)
          assertEquals(
                  EntityState.ATTACHED,
                  MmEntityUtils.getEntityState(entity));
  
          repository.remove(entity.getPojo());
  
          // expected post-condition (after removal)
          assertEquals(
                  EntityState.TRANSIENT_OR_REMOVED,
                  MmEntityUtils.getEntityState(entity));
  
          setEntityRef(entity);
      }
  
      @Test @Order(4) @Commit
      void postCondition_shouldBe_anEmptyRepository() {
  
          var entity = getEntityRef();
  
          assertEquals(
                  EntityState.REMOVED,
                  MmEntityUtils.getEntityState(entity));
          assertEquals(0, repository.allInstances(JpaEntityGeneratedLongId.class).size());
  
      }
  
      @Test @Order(5)
      void cleanup() {
          kvStore.clear(this);
      }
  
      // -- HELPER
  
      void setEntityRef(final ManagedObject entity) {
          kvStore.put(this, "entity", entity);
      }
  
      ManagedObject getEntityRef() {
          var entity = (ManagedObject) kvStore.get(this, "entity").get();
          return entity;
      }
  
  }
  