/*
    * ====================================================================
    * 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.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   *
   */
  
  package org.apache.hc.core5.http.io.entity;
  
  import org.junit.jupiter.api.Test;
  
  import java.io.ByteArrayOutputStream;
  import java.io.IOException;
  import java.io.InputStream;
  import java.util.Collections;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertNull;
  
  public class TestNullEntity {
  
      @Test
      public void testLength() {
          assertEquals(0, NullEntity.INSTANCE.getContentLength());
      }
  
      @Test
      public void testContentType() {
          assertNull(NullEntity.INSTANCE.getContentType());
      }
  
      @Test
      public void testContentEncoding() {
          assertNull(NullEntity.INSTANCE.getContentEncoding());
      }
  
      @Test
      public void testTrailerNames() {
          assertEquals(Collections.emptySet(), NullEntity.INSTANCE.getTrailerNames());
      }
  
      @Test
      public void testContentStream() throws IOException {
          try (InputStream content = NullEntity.INSTANCE.getContent()) {
              assertEquals(-1, content.read());
          }
          // Closing the resource should have no impact
          try (InputStream content = NullEntity.INSTANCE.getContent()) {
              assertEquals(-1, content.read());
          }
      }
  
      @Test
      public void testWriteTo() throws IOException {
          final ByteArrayOutputStream baos = new ByteArrayOutputStream();
          NullEntity.INSTANCE.writeTo(baos);
          assertEquals(0, baos.size());
      }
  
      @Test
      public void testIsStreaming() {
          assertFalse(NullEntity.INSTANCE.isStreaming());
      }
  
      @Test
      public void testIsChunked() {
          assertFalse(NullEntity.INSTANCE.isChunked());
      }
  }