/*
    * 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.
   */
  package org.apache.commons.vfs2;
  
  import java.util.Iterator;
  
  import org.junit.AfterClass;
  import org.junit.Assert;
  import org.junit.BeforeClass;
  import org.junit.Test;
  
  /**
   * Tests {@link FileObject}s with iterators its implementation the {@link Iterable} interface to allow a FileObject to
   * be the target of the Java 5 "foreach" statement.
   */
  public class FileIteratorTest {
  
      private static FileObject BaseFolder;
  
      private final static int FileCount = 14;
  
      /**
       * Creates a RAM FS.
       *
       * @throws Exception
       */
      @BeforeClass
      public static void setUpClass() throws Exception {
          BaseFolder = VFS.getManager().resolveFile("ram://" + FileIteratorTest.class.getName());
          BaseFolder.deleteAll();
          BaseFolder.resolveFile("a.htm").createFile();
          BaseFolder.resolveFile("a.html").createFile();
          BaseFolder.resolveFile("a.xhtml").createFile();
          BaseFolder.resolveFile("b.htm").createFile();
          BaseFolder.resolveFile("b.html").createFile();
          BaseFolder.resolveFile("b.xhtml").createFile();
          BaseFolder.resolveFile("c.htm").createFile();
          BaseFolder.resolveFile("c.html").createFile();
          BaseFolder.resolveFile("c.xhtml").createFile();
          BaseFolder.resolveFile("subdir1").createFolder();
          BaseFolder.resolveFile("subdir1/subfile1.txt").createFile();
          BaseFolder.resolveFile("subdir2").createFolder();
          BaseFolder.resolveFile("subdir2/subfile1.txt").createFile();
      }
  
      /**
       * Deletes RAM FS files.
       *
       * @throws Exception
       */
      @AfterClass
      public static void tearDownClass() throws Exception {
          if (BaseFolder != null) {
              BaseFolder.deleteAll();
          }
      }
  
      @Test
      public void testIterator() throws FileSystemException {
          final FileObject[] findFiles = BaseFolder.findFiles(Selectors.SELECT_ALL);
          Assert.assertEquals(FileCount, findFiles.length);
          final FileObject[] listFiles = BaseFolder.getChildren();
          Assert.assertTrue(FileCount > listFiles.length);
          int i = 0;
          for (final FileObject actualFile : BaseFolder) {
              final FileObject expectedFile = findFiles[i];
              Assert.assertEquals(expectedFile, actualFile);
              i++;
          }
          final Iterator<FileObject> iter = BaseFolder.iterator();
          i = 0;
          while (iter.hasNext()) {
              final FileObject expectedFile = findFiles[i];
              Assert.assertEquals(expectedFile, iter.next());
              i++;
          }
      }
  }