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   *  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
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   *
   *        http://www.apache.org/licenses/LICENSE-2.0
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  package org.apache.causeway.persistence.jdo.metamodel.facets.object.version;
  
  import javax.jdo.annotations.Version;
  
  import org.hamcrest.CoreMatchers;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  import static org.hamcrest.CoreMatchers.is;
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  import org.apache.causeway.commons.internal.exceptions._Exceptions;
  import org.apache.causeway.core.config.CausewayConfiguration;
  import org.apache.causeway.core.metamodel._testing.MetaModelContext_forTesting;
  import org.apache.causeway.core.metamodel.progmodel.ProgrammingModel.FacetProcessingOrder;
  import org.apache.causeway.core.metamodel.progmodel.ProgrammingModelAbstract;
  import org.apache.causeway.core.metamodel.specloader.validator.ValidationFailures;
  import org.apache.causeway.persistence.jdo.metamodel.testing.AbstractFacetFactoryTest;
  
  class JdoVersionAnnotationFacetFactoryTest_validate {
  
      private MetaModelContext_forTesting metaModelContext;
  
      @BeforeEach
      void setUp() throws Exception {
  
          var configuration = CausewayConfiguration.builder().build();
  
          metaModelContext = MetaModelContext_forTesting
          .builder()
          .programmingModelFactory((mmc, refiners)->{
  
              var programmingModel = new ProgrammingModelAbstract(mmc) {
                  @Override public MixinNamingStrategy mixinNamingStrategy() {
                      throw _Exceptions.notImplemented();
                  }
              };
  
              var facetFactory = new JdoVersionAnnotationFacetFactory(
                      metaModelContext,
                      AbstractFacetFactoryTest.jdoFacetContextForTesting());
  
              programmingModel
              .addFactory(FacetProcessingOrder.A2_AFTER_FALLBACK_DEFAULTS, facetFactory);
  
              return programmingModel;
  
          })
          .configuration(configuration)
          .build();
  
      }
  
      @Test
      void whenNoFacet() {
  
          class Child {}
  
          var failures = processThenValidate(Child.class);
          assertThat(failures.getNumberOfFailures(), is(0));
      }
  
      @Test
      void whenHasFacetNoSuperType() {
  
          @Version
          class Child {}
  
          var failures = processThenValidate(Child.class);
          assertThat(failures.getNumberOfFailures(), is(0));
      }
  
      @Test
      void whenHasFacetWithSuperTypeHasNoFacet() {
  
          class Parent {}
  
          @Version
          class Child extends Parent {}
  
          var failures = processThenValidate(Child.class);
          assertThat(failures.getNumberOfFailures(), is(0));
      }
  
      @Test
      void whenHasFacetWithParentTypeHasFacet() {
  
          @Version
          class Parent {}
  
          @Version
          class Child extends Parent {}
  
          var failures = processThenValidate(Child.class);
  
          assertThat(failures.getNumberOfFailures(), is(1));
          assertThat(failures.getMessages().iterator().next(),
                  CoreMatchers.containsString("@Version annotation is ambiguous within a class hierarchy"));
      }
  
      @Test
      void whenHasFacetWithGrandParentTypeHasFacet() {
  
          @Version
          class GrandParent {}
  
          class Parent extends GrandParent {}
  
          @Version
          class Child extends Parent {}
  
          var failures = processThenValidate(Child.class);
  
          assertTrue(failures.getNumberOfFailures()>=1);
          assertThat(failures.getMessages().iterator().next(),
                  CoreMatchers.containsString("@Version annotation is ambiguous within a class hierarchy"));
      }
  
      @Test
      void whenHasFacetWithAbstactParentTypeHasFacet() {
  
          @Version
          abstract class Parent {}
  
          class Child extends Parent {}
  
          var failures = processThenValidate(Child.class);
  
          assertThat(failures.getNumberOfFailures(), is(0));
      }
  
      private ValidationFailures processThenValidate(final Class<?> cls) {
          var specLoader = metaModelContext.getSpecificationLoader();
          specLoader.specForType(cls).get(); // fail if empty
          return specLoader.getOrAssessValidationResult();
      }
  
  }
  