/*
    * ====================================================================
    * 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.http.entity;
  
  import java.io.ByteArrayOutputStream;
  import java.io.File;
  import java.io.FileOutputStream;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.RandomAccessFile;
  
  import org.junit.Assert;
  import org.junit.ClassRule;
  import org.junit.Test;
  import org.junit.rules.TemporaryFolder;
  
  /**
   * Unit tests for {@link FileEntity}.
   *
   */
  public class TestFileEntity {
  
      @ClassRule
      public static final TemporaryFolder tempFolder = new TemporaryFolder();
  
      @Test
      public void testFileLengthMaxIntPlusOne() throws IOException {
          final File file = tempFolder.newFile("test.bin");
          final RandomAccessFile raFile = new RandomAccessFile(file, "rw");
          try {
              final long expectedLength = 1L + Integer.MAX_VALUE;
              raFile.setLength(expectedLength);
              final FileEntity fileEntity = new FileEntity(file);
              Assert.assertEquals(expectedLength, fileEntity.getContentLength());
          } finally {
              raFile.close();
          }
      }
  
      @Test
      public void testBasics() throws Exception {
          final File tmpfile = File.createTempFile("testfile", ".txt");
          tmpfile.deleteOnExit();
          final FileEntity httpentity = new FileEntity(tmpfile, ContentType.TEXT_PLAIN);
  
          Assert.assertEquals(tmpfile.length(), httpentity.getContentLength());
          final InputStream content = httpentity.getContent();
          Assert.assertNotNull(content);
          content.close();
          Assert.assertTrue(httpentity.isRepeatable());
          Assert.assertFalse(httpentity.isStreaming());
          if (!tmpfile.delete()) {
              Assert.fail("Failed to delete: " + tmpfile);
          }
      }
  
      @Test
      public void testIllegalConstructor() throws Exception {
          try {
              new FileEntity(null, ContentType.TEXT_PLAIN);
              Assert.fail("IllegalArgumentException should have been thrown");
          } catch (final IllegalArgumentException ex) {
              // expected
          }
      }
  
      @Test
      public void testWriteTo() throws Exception {
          final File tmpfile = File.createTempFile("testfile", ".txt");
          tmpfile.deleteOnExit();
  
          final FileOutputStream outStream = new FileOutputStream(tmpfile);
          outStream.write(0);
          outStream.write(1);
         outStream.write(2);
         outStream.write(3);
         outStream.close();
 
         final FileEntity httpentity = new FileEntity(tmpfile, ContentType.TEXT_PLAIN);
 
         final ByteArrayOutputStream out = new ByteArrayOutputStream();
         httpentity.writeTo(out);
         final byte[] bytes = out.toByteArray();
         Assert.assertNotNull(bytes);
         Assert.assertEquals(tmpfile.length(), bytes.length);
         for (int i = 0; i < 4; i++) {
             Assert.assertEquals(i, bytes[i]);
         }
         if (!tmpfile.delete()) {
             Assert.fail("Failed to delete: " + tmpfile);
         }
 
         try {
             httpentity.writeTo(null);
             Assert.fail("IllegalArgumentException should have been thrown");
         } catch (final IllegalArgumentException ex) {
             // expected
         }
     }
 
 }