/*
    * 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.io.file;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertNotEquals;
  
  import java.nio.file.DirectoryStream;
  import java.nio.file.Files;
  import java.nio.file.Path;
  import java.util.Iterator;
  
  import org.apache.commons.io.filefilter.NameFileFilter;
  import org.junit.jupiter.api.Test;
  
  /**
   * Tests {@link DirectoryStreamFilter}.
   */
  public class DirectoryStreamFilterTest {
  
      private static final String PATH_FIXTURE = "NOTICE.txt";
  
      @Test
      public void testFilterByName() throws Exception {
          final PathFilter pathFilter = new NameFileFilter(PATH_FIXTURE);
          final DirectoryStreamFilter streamFilter = new DirectoryStreamFilter(pathFilter);
          assertEquals(pathFilter, streamFilter.getPathFilter());
          try (DirectoryStream<Path> stream = Files.newDirectoryStream(PathUtils.current(), streamFilter)) {
              final Iterator<Path> iterator = stream.iterator();
              final Path path = iterator.next();
              assertEquals(PATH_FIXTURE, PathUtils.getFileNameString(path));
              assertFalse(iterator.hasNext());
          }
      }
  
      @Test
      public void testFilterByNameNot() throws Exception {
          final PathFilter pathFilter = new NameFileFilter(PATH_FIXTURE).negate();
          final DirectoryStreamFilter streamFilter = new DirectoryStreamFilter(pathFilter);
          assertEquals(pathFilter, streamFilter.getPathFilter());
          try (DirectoryStream<Path> stream = Files.newDirectoryStream(PathUtils.current(), streamFilter)) {
              stream.forEach(path -> assertNotEquals(PATH_FIXTURE, PathUtils.getFileNameString(path)));
          }
      }
  
  }