/*
    * ====================================================================
    * 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.io.InputStream;
  import java.io.OutputStream;
  import java.nio.file.Files;
  import java.nio.file.Path;
  
  import org.apache.hc.core5.http.ContentType;
  import org.junit.Assert;
  import org.junit.Test;
  
  /**
   * Unit tests for {@link PathEntity}.
   */
  public class TestPathEntity {
  
      @Test
      public void testBasics() throws Exception {
          final Path tmpPath = Files.createTempFile("testfile", ".txt");
          // Mark the file for deletion on VM exit if an assertion fails.
          tmpPath.toFile().deleteOnExit();
          try (final PathEntity httpEntity = new PathEntity(tmpPath, ContentType.TEXT_PLAIN)) {
              Assert.assertEquals(Files.size(tmpPath), httpEntity.getContentLength());
              try (final InputStream content = httpEntity.getContent()) {
                  Assert.assertNotNull(content);
              }
              Assert.assertTrue(httpEntity.isRepeatable());
              Assert.assertFalse(httpEntity.isStreaming());
              // If we can't delete the file now, then the PathEntity or test is hanging on to a file handle.
              if (!Files.deleteIfExists(tmpPath)) {
                  Assert.fail("Failed to delete: " + tmpPath);
              }
          }
      }
  
      @Test
      public void testNullConstructor() throws Exception {
          try (final PathEntity httpEntity = new PathEntity(null, ContentType.TEXT_PLAIN)) {
              Assert.fail("NullPointerException should have been thrown");
          } catch (final NullPointerException ex) {
              // expected
          }
      }
  
      @Test
      public void testWriteTo() throws Exception {
          final Path tmpPath = Files.createTempFile("testfile", ".txt");
          // Mark the file for deletion on VM exit if an assertion fails.
          tmpPath.toFile().deleteOnExit();
          try (final OutputStream outStream = Files.newOutputStream(tmpPath)) {
              outStream.write(0);
              outStream.write(1);
              outStream.write(2);
              outStream.write(3);
          }
  
          try (final PathEntity httpEntity = new PathEntity(tmpPath, ContentType.TEXT_PLAIN)) {
              final ByteArrayOutputStream out = new ByteArrayOutputStream();
              httpEntity.writeTo(out);
              final byte[] bytes = out.toByteArray();
              Assert.assertNotNull(bytes);
              Assert.assertEquals(Files.size(tmpPath), bytes.length);
              for (int i = 0; i < 4; i++) {
                  Assert.assertEquals(i, bytes[i]);
              }
              // If we can't delete the file now, then the PathEntity or test is hanging on to a file handle
              if (!Files.deleteIfExists(tmpPath)) {
                  Assert.fail("Failed to delete: " + tmpPath);
              }
  
              try {
                 httpEntity.writeTo(null);
                 Assert.fail("NullPointerException should have been thrown");
             } catch (final NullPointerException ex) {
                 // expected
             }
         }
     }
 }