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   *  to you under the Apache License, Version 2.0 (the
   *  "License"); you may not use this file except in compliance
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   *        http://www.apache.org/licenses/LICENSE-2.0
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  package org.apache.causeway.testdomain.transactions.jpa;
  
  import jakarta.inject.Inject;
  
  import org.junit.jupiter.api.AfterEach;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.extension.ExtendWith;
  
  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.DirtiesContext;
  import org.springframework.test.context.TestPropertySource;
  
  import org.apache.causeway.applib.services.iactnlayer.InteractionService;
  import org.apache.causeway.applib.services.repository.RepositoryService;
  import org.apache.causeway.applib.services.xactn.TransactionService;
  import org.apache.causeway.commons.internal.base._Refs;
  import org.apache.causeway.commons.internal.base._Refs.ObjectReference;
  import org.apache.causeway.core.config.presets.CausewayPresets;
  import org.apache.causeway.core.transaction.events.TransactionCompletionStatus;
  import org.apache.causeway.testdomain.jpa.JpaTestDomainPersona;
  import org.apache.causeway.testdomain.jpa.conf.Configuration_usingJpa;
  import org.apache.causeway.testdomain.jpa.entities.JpaBook;
  import org.apache.causeway.testing.fixtures.applib.fixturescripts.FixtureScripts;
  import org.apache.causeway.testing.integtestsupport.applib.CausewayInteractionHandler;
  import org.apache.causeway.testing.unittestsupport.applib.annotations.DisabledIfRunningWithSurefire;
  
  @SpringBootTest(
          classes = {
                  Configuration_usingJpa.class,
                  CommitListener.class
          },
          properties = {
                    "spring.datasource.url=jdbc:h2:mem:JpaTransactionRollbackTest_usingInteractionService",
  //                "logging.level.org.springframework.test.context.transaction.*=DEBUG",
  //                "logging.level.org.springframework.orm.jpa.*=DEBUG",
          })
  @TestPropertySource(CausewayPresets.UseLog4j2Test)
  @ExtendWith({CausewayInteractionHandler.class})
  @DirtiesContext
  @DisabledIfRunningWithSurefire
  class JpaTransactionRollbackTest_usingInteractionService
  //extends CausewayIntegrationTestAbstract
  {
  
      @Inject private FixtureScripts fixtureScripts;
      @Inject private TransactionService transactionService;
      @Inject private InteractionService interactionService;
      @Inject private RepositoryService repository;
      @Inject private CommitListener commitListener;
  
      private ObjectReference<CommitListener.TransactionCompletionStatusHolder> transactionAfterCompletionEvent;
  
      @BeforeEach
      void setUp() {
  
          // cleanup
          fixtureScripts.runPersona(JpaTestDomainPersona.InventoryPurgeAll);
  
          transactionAfterCompletionEvent = _Refs.objectRef(null);
      }
  
      @AfterEach
      void cleanUp() {
      }
  
      @Test
      void happyCaseTx_shouldCommit() {
  
          transactionService.runWithinCurrentTransactionElseCreateNew(()->{
  
              // expected pre condition
              assertEquals(0, repository.allInstances(JpaBook.class).size());
          });
  
          commitListener.bind(transactionAfterCompletionEvent::set);
  
          interactionService.runAnonymous(()->{
  
              fixtureScripts.runPersona(JpaTestDomainPersona.InventoryWith1Book);
          });
  
          assertEquals(
                  TransactionCompletionStatus.COMMITTED,
                  transactionAfterCompletionEvent.getValue().map(x -> x.transactionCompletionStatus).orElse(null));
  
          transactionService.runWithinCurrentTransactionElseCreateNew(()->{
  
              // expected post condition
              assertEquals(1, repository.allInstances(JpaBook.class).size());
          });
  
      }
  
      @Test
      void whenExceptionWithinTx_whileNotParticipating_shouldRollback() {
  
          transactionService.runWithinCurrentTransactionElseCreateNew(()->{
  
              // expected pre condition
              assertEquals(0, repository.allInstances(JpaBook.class).size());
          });
  
          //_Probe.errOut("before tx that should trigger a rollback");
  
          commitListener.bind(transactionAfterCompletionEvent::set);
  
          var result = interactionService.runAnonymousAndCatch(()->{
  
              fixtureScripts.runPersona(JpaTestDomainPersona.InventoryWith1Book);
  
              throw new RuntimeException("Test: force current tx to rollback");
          });
  
          //_Probe.errOut("after tx that should have triggered a rollback");
  
          assertTrue(result.isFailure());
          assertEquals(
                  TransactionCompletionStatus.ROLLED_BACK,
                  transactionAfterCompletionEvent.getValue().map(x -> x.transactionCompletionStatus).orElse(null));
  
          transactionService.runWithinCurrentTransactionElseCreateNew(()->{
  
              // expected post condition
              assertEquals(0, repository.allInstances(JpaBook.class).size());
          });
  
      }
  
      @Test
      void whenExceptionWithinTx_whileParticipating_shouldRollback() {
  
          transactionService.runWithinCurrentTransactionElseCreateNew(()->{
  
              // expected pre condition
              assertEquals(0, repository.allInstances(JpaBook.class).size());
          });
  
          //_Probe.errOut("before outer tx");
  
          commitListener.bind(transactionAfterCompletionEvent::set);
  
          var result = interactionService.runAnonymousAndCatch(()->{
  
              //_Probe.errOut("before tx that should trigger a rollback");
  
              var innerResult = transactionService.runWithinCurrentTransactionElseCreateNew(()->{
  
                  fixtureScripts.runPersona(JpaTestDomainPersona.InventoryWith1Book);
  
                  throw new RuntimeException("Test: force current tx to rollback");
              });
  
              assertTrue(innerResult.isFailure());
  
              //_Probe.errOut("after tx that should have triggered a rollback");
  
          });
  
          //_Probe.errOut("after outer tx");
  
          // interactionService detects whether a rollback was requested and does not throw in such a case
          assertTrue(result.isSuccess());
  
          assertEquals(
                  TransactionCompletionStatus.ROLLED_BACK,
                  transactionAfterCompletionEvent.getValue().map(x -> x.transactionCompletionStatus).orElse(null));
  
          transactionService.runWithinCurrentTransactionElseCreateNew(()->{
  
              // expected post condition
              assertEquals(0, repository.allInstances(JpaBook.class).size());
          });
  
      }
  
      // -- HELPER
  
  }
  