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   *  Licensed to the Apache Software Foundation (ASF) under one
   *  or more contributor license agreements.  See the NOTICE file
   *  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,
   *  software distributed under the License is distributed on an
   *  "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
   *  under the License.
   */
  package org.apache.causeway.core.metamodel.interactions;
  
  import org.junit.jupiter.api.AfterEach;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  import org.apache.causeway.commons.internal.functions._Predicates;
  import org.apache.causeway.core.metamodel._testing.MetaModelContext_forTesting;
  import org.apache.causeway.core.metamodel.facetapi.Facet;
  import org.apache.causeway.core.metamodel.facetapi.FacetAbstract;
  import org.apache.causeway.core.metamodel.facetapi.FacetHolder;
  
  class InteractionUtils_isA_Test {
  
      class FooSuperFacet extends FacetAbstract {
          public FooSuperFacet(final Class<? extends Facet> facetType, final FacetHolder holder) {
              super(facetType, holder);
          }
      }
  
      class FooFacet extends FooSuperFacet {
          public FooFacet(final FacetHolder holder) {
              super(FooFacet.class, holder);
          }
      }
  
      class FooSubFacet extends FooFacet {
          public FooSubFacet(final FacetHolder holder) {
              super(holder);
          }
      }
  
      class BarFacet extends FacetAbstract {
          public BarFacet(final FacetHolder holder) {
              super(BarFacet.class, holder);
          }
      }
  
      private FacetHolder facetHolder;
  
      @BeforeEach
      protected void setUp() throws Exception {
          facetHolder = FacetHolder.forTesting(MetaModelContext_forTesting.buildDefault());
      }
  
      @AfterEach
      protected void tearDown() throws Exception {
          facetHolder = null;
      }
  
      @Test
      void isAWhenIs() {
          var predicate = _Predicates.instanceOf(FooFacet.class);
          var fooFacet = new FooFacet(facetHolder);
          assertTrue(predicate.test(fooFacet));
      }
  
      @Test
      void isAWhenIsNot() {
          var predicate = _Predicates.instanceOf(FooFacet.class);
          var barFacet = new BarFacet(facetHolder);
          assertFalse(predicate.test(barFacet));
      }
  
      @Test
      void isAWhenIsSubclass() {
          var predicate = _Predicates.instanceOf(FooFacet.class);
          var fooSubFacet = new FooSubFacet(facetHolder);
          assertTrue(predicate.test(fooSubFacet));
      }
  
      @Test
      void isAWhenIsNotBecauseASuperclass() {
          var predicate = _Predicates.instanceOf(FooFacet.class);
          var fooSuperFacet = new FooSuperFacet(FooSuperFacet.class, facetHolder);
          assertFalse(predicate.test(fooSuperFacet));
      }
  
  }
  