content: /*
   *  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.commons;
  
  import java.util.Arrays;
  import java.util.Collection;
  import java.util.Collections;
  import java.util.List;
  
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  import static org.hamcrest.CoreMatchers.is;
  import static org.hamcrest.MatcherAssert.assertThat;
  
  class TypesTest_filteredList {
  
      private List<Object> shapes;
  
      abstract static class Shape {}
      static class Square extends Shape {}
      static class Circle extends Shape {}
      static class Rectangle extends Shape {}
  
      @BeforeEach
      public void setUp() throws Exception {
          shapes = Arrays.<Object>asList(new Square(), new Circle(), new Square());
      }
  
      @Test
      public void empty() throws ClassNotFoundException {
          final Collection<Object> filtered = ListExtensions.filtered(Collections.emptyList(), Object.class);
          assertThat(filtered.isEmpty(), is(true));
      }
  
      @Test
      public void subtype() throws ClassNotFoundException {
          final Collection<Square> filtered = ListExtensions.filtered(shapes, Square.class);
          assertThat(filtered.size(), is(2));
      }
  
      @Test
      public void supertype() throws ClassNotFoundException {
          final Collection<Shape> filtered = ListExtensions.filtered(shapes, Shape.class);
          assertThat(filtered.size(), is(3));
      }
  
      @Test
      public void subtype_whenNonMatching() throws ClassNotFoundException {
          final Collection<Rectangle> filtered = ListExtensions.filtered(shapes, Rectangle.class);
          assertThat(filtered.size(), is(0));
      }
  
  }
  