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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
   *
   *  Unless required by applicable law or agreed to in writing,
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   *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   *  KIND, either express or implied.  See the License for the
   *  specific language governing permissions and limitations
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  package org.apache.causeway.core.metamodel.facets.actions.action;
  
  import java.util.Collection;
  import java.util.Optional;
  
  import org.hamcrest.Matchers;
  import org.junit.jupiter.api.Test;
  
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertNotNull;
  import static org.junit.jupiter.api.Assertions.assertNull;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  import org.apache.causeway.applib.annotation.Action;
  import org.apache.causeway.commons.semantics.CollectionSemantics;
  import org.apache.causeway.core.metamodel.facets.FacetFactory.ProcessMethodContext;
  import org.apache.causeway.core.metamodel.facets.actcoll.typeof.TypeOfFacet;
  import org.apache.causeway.core.metamodel.facets.actcoll.typeof.TypeOfFacetFromFeature;
  import org.apache.causeway.core.metamodel.facets.actions.action.typeof.TypeOfFacetForActionAnnotation;
  
  import static org.apache.causeway.core.metamodel.commons.matchers.CausewayMatchers.classEqualTo;
  
  class ActionAnnotationFacetFactoryTest_TypeOf
  extends ActionAnnotationFacetFactoryTest {
  
      private void processTypeOf(
              final ActionAnnotationFacetFactory facetFactory, final ProcessMethodContext processMethodContext) {
          var actionIfAny = processMethodContext.synthesizeOnMethod(Action.class);
          facetFactory.processTypeOf(processMethodContext, actionIfAny);
      }
  
      @Test
      void whenDeprecatedTypeOfAnnotationOnActionNotReturningCollection() {
  
          class Customer {
              @SuppressWarnings("unused")
              public Customer someAction() { return null; }
          }
  
          // given
          actionScenario(Customer.class, "someAction", (processMethodContext, facetHolder, facetedMethod)->{
              // when
              processTypeOf(facetFactory, processMethodContext);
              // then
              final TypeOfFacet facet = facetedMethod.getFacet(TypeOfFacet.class);
              assertNull(facet);
          });
      }
  
      @Test
      void whenActionAnnotationOnActionReturningCollection() {
  
          class Order {
          }
          class Customer {
              @SuppressWarnings("rawtypes")
              @Action(typeOf = Order.class)
              public Collection someAction() { return null; }
          }
  
          // given
          actionScenario(Customer.class, "someAction", (processMethodContext, facetHolder, facetedMethod)->{
              // when
              processTypeOf(facetFactory, processMethodContext);
              // then
              final TypeOfFacet facet = facetedMethod.getFacet(TypeOfFacet.class);
              assertNotNull(facet);
              assertTrue(facet instanceof TypeOfFacetForActionAnnotation);
              assertThat(facet.value().elementType(), classEqualTo(Order.class));
          });
      }
  
      @Test
      void whenActionAnnotationOnActionNotReturningCollection() {
  
          class Order {
          }
          class Customer {
              @Action(typeOf = Order.class)
              public Customer someAction() { return null; }
          }
  
          // given
          actionScenario(Customer.class, "someAction", (processMethodContext, facetHolder, facetedMethod)->{
              // when
              processTypeOf(facetFactory, processMethodContext);
              // then
              final TypeOfFacet facet = facetedMethod.getFacet(TypeOfFacet.class);
              assertNull(facet);
          });
      }
  
      @Test
      void whenInferFromType() {
  
          class Order {
          }
          class Customer {
              @SuppressWarnings("unused")
              public Order[] someAction() { return null; }
          }
  
          // given
          actionScenario(Customer.class, "someAction", (processMethodContext, facetHolder, facetedMethod)->{
              // when
              processTypeOf(facetFactory, processMethodContext);
              // then
              final TypeOfFacet facet = facetedMethod.getFacet(TypeOfFacet.class);
              assertNotNull(facet);
              assertTrue(facet instanceof TypeOfFacet);
              assertThat(facet.value().elementType(), classEqualTo(Order.class));
              assertThat(facet.value().collectionSemantics(), Matchers.is(Optional.of(CollectionSemantics.ARRAY)));
          });
      }
  
      @Test
      void whenInferFromGenerics() {
  
          class Order {
          }
          class Customer {
              @SuppressWarnings("unused")
              public Collection<Order> someAction() { return null; }
          }
  
          // given
          actionScenario(Customer.class, "someAction", (processMethodContext, facetHolder, facetedMethod)->{
              // when
              processTypeOf(facetFactory, processMethodContext);
              // then
              final TypeOfFacet facet = facetedMethod.getFacet(TypeOfFacet.class);
              assertNotNull(facet);
              assertEquals(TypeOfFacetFromFeature.class, facet.getClass());
              assertThat(facet.value().elementType(), classEqualTo(Order.class));
          });
      }
  }
  