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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.facets.object.mixin;
  
  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.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertNotNull;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  import org.apache.causeway.applib.annotation.Action;
  import org.apache.causeway.applib.annotation.Collection;
  import org.apache.causeway.applib.annotation.DomainObject;
  import org.apache.causeway.applib.annotation.Property;
  
  import lombok.Data;
  import lombok.RequiredArgsConstructor;
  
  class MixinIntendedAsActionTest extends MixinIntendedAs {
  
      @BeforeEach
      void beforeEach() throws Exception {
          super.setUp();
      }
  
      @AfterEach
      void afterEach() throws Exception {
          super.tearDown();
      }
  
      // the non holder
      @DomainObject
      static class NoCustomer {
  
      }
  
      // the (shared) holder
      @DomainObject @Data
      static class Customer {
          String name;
      }
  
      // ------------------------------
      // -- classic mix-in declaration
      // ------------------------------
  
      @Action @RequiredArgsConstructor
      static class Customer_mixin {
  
          private final Customer holder;
  
          public void act(final String newName) { holder.setName(newName); }
      }
  
      @Test
      void classicMixin_shouldHaveProperFacet() {
  
          var mixinFacet = super.runTypeContextOn(Customer_mixin.class)
                  .getFacet(MixinFacet.class);
  
          // proper predicates
          assertNotNull(mixinFacet);
          assertTrue(mixinFacet.isMixinFor(Customer.class));
          assertFalse(mixinFacet.isMixinFor(NoCustomer.class));
  
          // proper instantiation
          var holderPojo = new Customer();
          var mixinPojo = mixinFacet.instantiate(holderPojo);
          ((Customer_mixin)mixinPojo).act("hello");
          assertEquals("hello", holderPojo.getName());
  
      }
  
      // ------------------------------------------
      // -- advanced mix-in declaration ... @Action
      // ------------------------------------------
  
      @Action @RequiredArgsConstructor
      static class Customer_action {
  
          private final Customer holder;
  
          public void $$(final String newName) { holder.setName(newName); }
      }
  
      @Test
      void actionMixin_shouldHaveProperFacet() {
  
          var mixinFacet = super.runTypeContextOn(Customer_action.class)
                  .getFacet(MixinFacet.class);
  
          // proper predicates
          assertNotNull(mixinFacet);
          assertTrue(mixinFacet.isMixinFor(Customer.class));
          assertFalse(mixinFacet.isMixinFor(NoCustomer.class));
  
          // proper instantiation
          var holderPojo = new Customer();
          var mixinPojo = mixinFacet.instantiate(holderPojo);
          ((Customer_action)mixinPojo).$$("hello");
          assertEquals("hello", holderPojo.getName());
      }
  
      // ------------------------------------------
      // -- advanced mix-in declaration ... @Property
      // ------------------------------------------
  
      @Property @RequiredArgsConstructor
      static class Customer_property {
  
          private final Customer holder;
  
          public void $$(final String newName) { holder.setName(newName); }
      }
  
      @Test
      void propertyMixin_shouldHaveProperFacet() {
  
          var mixinFacet = super.runTypeContextOn(Customer_property.class)
                  .getFacet(MixinFacet.class);
  
          // proper predicates
          assertNotNull(mixinFacet);
          assertTrue(mixinFacet.isMixinFor(Customer.class));
          assertFalse(mixinFacet.isMixinFor(NoCustomer.class));
  
      }
  
      // ------------------------------------------
      // -- advanced mix-in declaration ... @Property
      // ------------------------------------------
  
      @Collection @RequiredArgsConstructor
      static class Customer_collection {
  
          private final Customer holder;
  
          public void $$(final String newName) { holder.setName(newName); }
      }
  
      @Test
      void collectionMixin_shouldHaveProperFacet() {
  
          var mixinFacet = super.runTypeContextOn(Customer_collection.class)
                  .getFacet(MixinFacet.class);
  
          // proper predicates
          assertNotNull(mixinFacet);
          assertTrue(mixinFacet.isMixinFor(Customer.class));
          assertFalse(mixinFacet.isMixinFor(NoCustomer.class));
  
      }
  
  }
  