/*
    * 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
    *
    *      https://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.commons.net.nntp;
  
  import static org.junit.jupiter.api.Assertions.assertNull;
  
  import java.util.Arrays;
  import java.util.List;
  
  import org.junit.jupiter.api.Test;
  
  /**
   * Test the Threader
   */
  class TestThreader {
  
      private static final Threadable[] EMPTY_THREADABLE_ARRAY = {};
  
      @SuppressWarnings("deprecation") // test of deprecated method
      @Test
      void testEmptyArray() { // NET-539
          final Threader t = new Threader();
          final Threadable[] messages = EMPTY_THREADABLE_ARRAY;
          assertNull(t.thread(messages));
      }
  
      @Test
      void testEmptyIterable() { // NET-539
          final Threader t = new Threader();
          final Threadable[] messages = EMPTY_THREADABLE_ARRAY;
          final Iterable<Threadable> asList = Arrays.asList(messages);
          assertNull(t.thread(asList));
      }
  
      @Test
      void testEmptyList() { // NET-539
          final Threader t = new Threader();
          final Threadable[] messages = EMPTY_THREADABLE_ARRAY;
          final List<Threadable> asList = Arrays.asList(messages);
          assertNull(t.thread(asList));
      }
  
      @Test
      @SuppressWarnings("deprecation") // test of deprecated method
      void testNullArray() { // NET-539
          final Threader t = new Threader();
          final Threadable[] messages = null;
          assertNull(t.thread(messages));
      }
  
      @Test
      void testNullIterable() {
          final Threader t = new Threader();
          final Iterable<Threadable> messages = null;
          assertNull(t.thread(messages));
      }
  
      @Test
      void testNullList() {
          final Threader t = new Threader();
          final List<Threadable> messages = null;
          assertNull(t.thread(messages));
      }
  
  }