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.internaltestsupport.contract;
  
  import java.util.Arrays;
  import java.util.List;
  
  import org.junit.jupiter.api.Test;
  
  /**
   * <p>
   *     Used by core.
   * </p>
   *
   * @param <T>
   */
  public abstract class ComparableContractTest_compareTo<T extends Comparable<T>> {
  
      /**
       * Return an array of tuples; each tuple should consist of 4 elements, whereby
       * item0  < item1 = item2 < item3
       *
       * Typically item0 should be null valued (if supported by the impl).
       */
      protected abstract List<List<T>> orderedTuples();
  
      @Test
      public void compareAllOrderedTuples() {
  
          new ComparableContractTester<T>(orderedTuples()).test();
      }
  
      /**
       * Syntax sugar to remove boilerplate from subclasses.
       */
      @SafeVarargs
      protected static <E> List<E> listOf(final E... elements) {
          return Arrays.asList(elements);
      }
  
  }
  