/*
    * 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.cache;
  
  import org.apache.commons.vfs2.FileName;
  import org.apache.commons.vfs2.FileObject;
  import org.apache.commons.vfs2.FileSystem;
  import org.apache.commons.vfs2.FilesCache;
  import org.apache.commons.vfs2.impl.DefaultFileSystemManager;
  import org.junit.Assert;
  import org.junit.Test;
  
  
  /**
   * Tests for {@link NullFilesCache} used by {@link NullFilesCacheTestCase}.
   */
  public class NullFilesCacheTests extends AbstractFilesCacheTestsBase {
  
      @Override
      @Test
      public void testBasicCacheOps() throws Exception {
          final DefaultFileSystemManager manager = getManager();
          Assert.assertNotNull("This test should not have a null DefaultFileSystemManager", manager);
          // the basic test looks different for a null cache:
          final FilesCache cache = manager.getFilesCache();
          final FileObject fo = getWriteFolder().resolveFile("dir1");
          final FileName fn = fo.getName();
          final FileSystem fs = fo.getFileSystem();
  
          cache.clear(fs);
          assertNull(cache.getFile(fs, fn));
  
          cache.putFile(fo);
          assertNull(null, cache.getFile(fs, fn));
  
          assertFalse(cache.putFileIfAbsent(fo)); // hmmm?
          assertNull(null, cache.getFile(fs, fn));
  
          cache.removeFile(fs, fn);
          assertNull(cache.getFile(fs, fn));
      }
  
      @Test
      public void testClass() {
          final DefaultFileSystemManager manager = getManager();
          Assert.assertNotNull("This test should not have a null DefaultFileSystemManager", manager);
          assertTrue(manager.getFilesCache() instanceof NullFilesCache);
      }
  
      @Test
      public void testFilesCache() throws Exception {
          final FileObject scratchFolder = getWriteFolder();
          Assert.assertNotNull("This test should not have a null FileObject scratch folder", scratchFolder);
  
          final FileObject dir1 = scratchFolder.resolveFile("dir1");
          final FileObject dir1_2 = scratchFolder.resolveFile("dir1");
  
          assertNotSame("Should always be new instance with NullCache", dir1, dir1_2);
      }
  }