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   *  Licensed to the Apache Software Foundation (ASF) under one
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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
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   *
   *        http://www.apache.org/licenses/LICENSE-2.0
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   *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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  package org.apache.causeway.core.metamodel.facets.object.ident.layout;
  
  import org.junit.jupiter.api.AfterEach;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  import org.mockito.Mockito;
  
  import static org.hamcrest.CoreMatchers.is;
  import static org.hamcrest.CoreMatchers.nullValue;
  import static org.hamcrest.MatcherAssert.assertThat;
  
  import org.apache.causeway.commons.internal.reflection._GenericResolver;
  import org.apache.causeway.core.metamodel.facetapi.FacetHolder;
  import org.apache.causeway.core.metamodel.facets.Mocking;
  import org.apache.causeway.core.metamodel.facets.object.layout.LayoutPrefixFacet;
  import org.apache.causeway.core.metamodel.facets.object.layout.LayoutPrefixFacetViaMethod;
  import org.apache.causeway.core.metamodel.object.ManagedObject;
  
  class LayoutFacetMethodTest {
  
      private Mocking mocking = new Mocking();
      private LayoutPrefixFacet facet;
      private ManagedObject mockOwningAdapter;
  
      private DomainObjectWithProblemInLayoutMethod pojo;
  
      public static class DomainObjectWithProblemInLayoutMethod {
          public String layout() {
              throw new NullPointerException("for testing purposes");
          }
      }
  
      @BeforeEach
      void setUp() throws Exception {
  
          pojo = new DomainObjectWithProblemInLayoutMethod();
  
          var iconNameMethod = _GenericResolver.testing
                  .resolveMethod(DomainObjectWithProblemInLayoutMethod.class, "layout");
          facet = LayoutPrefixFacetViaMethod.create(
                          iconNameMethod, Mockito.mock(FacetHolder.class))
                      .orElse(null);
  
          mockOwningAdapter = mocking.asViewmodel(pojo);
      }
  
      @AfterEach
      void tearDown() throws Exception {
          facet = null;
      }
  
      @Test
      void when_layout_throws_exception() {
          //assertThrows(NullPointerException.class, ()->facet.layout(mockOwningAdapter));
          final String layout = facet.layoutPrefix(mockOwningAdapter);
          assertThat(layout, is(nullValue()));
      }
  
  }
  