/*
    * ====================================================================
    * 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 java.io.ByteArrayOutputStream;
  import java.nio.charset.StandardCharsets;
  
  import org.junit.jupiter.api.Assertions;
  import org.junit.jupiter.api.Test;
  
  /**
   * Unit tests for {@link ByteArrayEntity}.
   *
   */
  public class TestByteArrayEntity {
  
      @Test
      public void testBasics() throws Exception {
          final byte[] bytes = "Message content".getBytes(StandardCharsets.US_ASCII);
          try (final ByteArrayEntity entity = new ByteArrayEntity(bytes, null)) {
  
              Assertions.assertEquals(bytes.length, entity.getContentLength());
              Assertions.assertNotNull(entity.getContent());
              Assertions.assertTrue(entity.isRepeatable());
              Assertions.assertFalse(entity.isStreaming());
          }
      }
  
      @Test
      public void testBasicOffLen() throws Exception {
          final byte[] bytes = "Message content".getBytes(StandardCharsets.US_ASCII);
          try (final ByteArrayEntity entity = new ByteArrayEntity(bytes, 8, 7, null)) {
  
              Assertions.assertEquals(7, entity.getContentLength());
              Assertions.assertNotNull(entity.getContent());
              Assertions.assertTrue(entity.isRepeatable());
              Assertions.assertFalse(entity.isStreaming());
          }
      }
  
      @Test
      public void testIllegalConstructorNullByteArray() throws Exception {
          Assertions.assertThrows(NullPointerException.class, () ->
                  new ByteArrayEntity(null, null));
      }
  
      @Test
      public void testIllegalConstructorBadLen() throws Exception {
          final byte[] bytes = "Message content".getBytes(StandardCharsets.US_ASCII);
          Assertions.assertThrows(IllegalArgumentException.class, () ->
                  new ByteArrayEntity(bytes, 0, bytes.length + 1, null));
      }
  
      @Test
      public void testIllegalConstructorBadOff1() throws Exception {
          final byte[] bytes = "Message content".getBytes(StandardCharsets.US_ASCII);
          Assertions.assertThrows(IllegalArgumentException.class, () ->
                  new ByteArrayEntity(bytes, -1, bytes.length, null));
      }
  
      @Test
      public void testIllegalConstructorBadOff2() throws Exception {
          final byte[] bytes = "Message content".getBytes(StandardCharsets.US_ASCII);
          Assertions.assertThrows(IllegalArgumentException.class, () ->
                  new ByteArrayEntity(bytes, bytes.length + 1, bytes.length, null));
      }
  
      @Test
      public void testWriteTo() throws Exception {
          final byte[] bytes = "Message content".getBytes(StandardCharsets.US_ASCII);
          try (final ByteArrayEntity entity = new ByteArrayEntity(bytes, null)) {
  
              ByteArrayOutputStream out = new ByteArrayOutputStream();
              entity.writeTo(out);
             byte[] bytes2 = out.toByteArray();
             Assertions.assertNotNull(bytes2);
             Assertions.assertEquals(bytes.length, bytes2.length);
             for (int i = 0; i < bytes.length; i++) {
                 Assertions.assertEquals(bytes[i], bytes2[i]);
             }
 
             out = new ByteArrayOutputStream();
             entity.writeTo(out);
             bytes2 = out.toByteArray();
             Assertions.assertNotNull(bytes2);
             Assertions.assertEquals(bytes.length, bytes2.length);
             for (int i = 0; i < bytes.length; i++) {
                 Assertions.assertEquals(bytes[i], bytes2[i]);
             }
 
             Assertions.assertThrows(NullPointerException.class, () -> entity.writeTo(null));
         }
     }
 
     @Test
     public void testWriteToOffLen() throws Exception {
         final byte[] bytes = "Message content".getBytes(StandardCharsets.US_ASCII);
         final int off = 8;
         final int len = 7;
         try (final ByteArrayEntity entity = new ByteArrayEntity(bytes, off, len, null)) {
 
             ByteArrayOutputStream out = new ByteArrayOutputStream();
             entity.writeTo(out);
             byte[] bytes2 = out.toByteArray();
             Assertions.assertNotNull(bytes2);
             Assertions.assertEquals(len, bytes2.length);
             for (int i = 0; i < len; i++) {
                 Assertions.assertEquals(bytes[i + off], bytes2[i]);
             }
 
             out = new ByteArrayOutputStream();
             entity.writeTo(out);
             bytes2 = out.toByteArray();
             Assertions.assertNotNull(bytes2);
             Assertions.assertEquals(len, bytes2.length);
             for (int i = 0; i < len; i++) {
                 Assertions.assertEquals(bytes[i + off], bytes2[i]);
             }
 
             Assertions.assertThrows(NullPointerException.class, () -> entity.writeTo(null));
         }
     }
 
 }