/*
    * ====================================================================
    * 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.Charset;
  import java.nio.charset.StandardCharsets;
  
  import org.apache.hc.core5.http.ContentType;
  import org.junit.Assert;
  import org.junit.Test;
  
  /**
   * Unit tests for {@link StringEntity}.
   */
  public class TestStringEntity {
  
      @Test
      public void testBasics() throws Exception {
          final String s = "Message content";
          final StringEntity httpentity = new StringEntity(s, ContentType.TEXT_PLAIN);
  
          final byte[] bytes = s.getBytes(StandardCharsets.ISO_8859_1);
          Assert.assertEquals(bytes.length, httpentity.getContentLength());
          Assert.assertNotNull(httpentity.getContent());
          Assert.assertTrue(httpentity.isRepeatable());
          Assert.assertFalse(httpentity.isStreaming());
      }
  
      @Test
      public void testNullConstructor() throws Exception {
          try {
              new StringEntity(null);
              Assert.fail("NullPointerException should have been thrown");
          } catch (final NullPointerException ex) {
              // expected
          }
      }
  
      @Test
      public void testDefaultContent() throws Exception {
          final String s = "Message content";
          StringEntity httpentity = new StringEntity(s, ContentType.create("text/csv", "ANSI_X3.4-1968"));
          Assert.assertEquals("text/csv; charset=US-ASCII", httpentity.getContentType());
          httpentity = new StringEntity(s, StandardCharsets.US_ASCII);
          Assert.assertEquals("text/plain; charset=US-ASCII", httpentity.getContentType());
          httpentity = new StringEntity(s);
          Assert.assertEquals("text/plain; charset=ISO-8859-1", httpentity.getContentType());
      }
  
      private static String constructString(final int [] unicodeChars) {
          final StringBuilder buffer = new StringBuilder();
          if (unicodeChars != null) {
              for (final int unicodeChar : unicodeChars) {
                  buffer.append((char)unicodeChar);
              }
          }
          return buffer.toString();
      }
  
      static final int SWISS_GERMAN_HELLO [] = {
              0x47, 0x72, 0xFC, 0x65, 0x7A, 0x69, 0x5F, 0x7A, 0xE4, 0x6D, 0xE4
          };
  
      @Test
      public void testNullCharset() throws Exception {
          final String s = constructString(SWISS_GERMAN_HELLO);
          StringEntity httpentity = new StringEntity(s, ContentType.create("text/plain", (Charset) null));
          Assert.assertNotNull(httpentity.getContentType());
          Assert.assertEquals("text/plain", httpentity.getContentType());
          Assert.assertEquals(s, EntityUtils.toString(httpentity));
          httpentity = new StringEntity(s, (Charset) null);
          Assert.assertNotNull(httpentity.getContentType());
          Assert.assertEquals("text/plain", httpentity.getContentType());
         Assert.assertEquals(s, EntityUtils.toString(httpentity));
     }
 
     @Test
     public void testWriteTo() throws Exception {
         final String s = "Message content";
         final byte[] bytes = s.getBytes(StandardCharsets.ISO_8859_1);
         final StringEntity httpentity = new StringEntity(s);
 
         ByteArrayOutputStream out = new ByteArrayOutputStream();
         httpentity.writeTo(out);
         byte[] bytes2 = out.toByteArray();
         Assert.assertNotNull(bytes2);
         Assert.assertEquals(bytes.length, bytes2.length);
         for (int i = 0; i < bytes.length; i++) {
             Assert.assertEquals(bytes[i], bytes2[i]);
         }
 
         out = new ByteArrayOutputStream();
         httpentity.writeTo(out);
         bytes2 = out.toByteArray();
         Assert.assertNotNull(bytes2);
         Assert.assertEquals(bytes.length, bytes2.length);
         for (int i = 0; i < bytes.length; i++) {
             Assert.assertEquals(bytes[i], bytes2[i]);
         }
 
         try {
             httpentity.writeTo(null);
             Assert.fail("NullPointerException should have been thrown");
         } catch (final NullPointerException ex) {
             // expected
         }
     }
 
 }