/*
    * 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;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  import java.io.BufferedOutputStream;
  import java.io.File;
  import java.io.IOException;
  import java.nio.file.Files;
  
  import org.apache.commons.io.test.TestUtils;
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.io.TempDir;
  /**
   * Tests {@link FileDeleteStrategy}.
   */
  public class FileDeleteStrategyTest {
  
      @TempDir
      public File temporaryFolder;
  
      @Test
      public void testDeleteForce() throws Exception {
          final File baseDir = temporaryFolder;
          final File subDir = new File(baseDir, "test");
          assertTrue(subDir.mkdir());
          final File subFile = new File(subDir, "a.txt");
          if (!subFile.getParentFile().exists()) {
              throw new IOException("Cannot create file " + subFile
                      + " as the parent directory does not exist");
          }
          try (BufferedOutputStream output =
                  new BufferedOutputStream(Files.newOutputStream(subFile.toPath()))) {
              TestUtils.generateTestData(output, 16);
          }
  
          assertTrue(subDir.exists());
          assertTrue(subFile.exists());
          // delete dir
          FileDeleteStrategy.FORCE.delete(subDir);
          assertFalse(subDir.exists());
          assertFalse(subFile.exists());
          // delete dir
          FileDeleteStrategy.FORCE.delete(subDir);  // no error
          assertFalse(subDir.exists());
      }
  
      @Test
      public void testDeleteNormal() throws Exception {
          final File baseDir = temporaryFolder;
          final File subDir = new File(baseDir, "test");
          assertTrue(subDir.mkdir());
          final File subFile = new File(subDir, "a.txt");
          if (!subFile.getParentFile().exists()) {
              throw new IOException("Cannot create file " + subFile
                      + " as the parent directory does not exist");
          }
          try (BufferedOutputStream output =
                  new BufferedOutputStream(Files.newOutputStream(subFile.toPath()))) {
              TestUtils.generateTestData(output, 16);
          }
  
          assertTrue(subDir.exists());
          assertTrue(subFile.exists());
          // delete dir
          assertThrows(IOException.class, () -> FileDeleteStrategy.NORMAL.delete(subDir));
          assertTrue(subDir.exists());
          assertTrue(subFile.exists());
          // delete file
          FileDeleteStrategy.NORMAL.delete(subFile);
          assertTrue(subDir.exists());
          assertFalse(subFile.exists());
          // delete dir
          FileDeleteStrategy.NORMAL.delete(subDir);
          assertFalse(subDir.exists());
          // delete dir
          FileDeleteStrategy.NORMAL.delete(subDir);  // no error
          assertFalse(subDir.exists());
      }
  
      @Test
     public void testDeleteNull() throws Exception {
         assertThrows(NullPointerException.class, () -> FileDeleteStrategy.NORMAL.delete(null));
         assertTrue(FileDeleteStrategy.NORMAL.deleteQuietly(null));
     }
 
     @Test
     public void testDeleteQuietlyNormal() throws Exception {
         final File baseDir = temporaryFolder;
         final File subDir = new File(baseDir, "test");
         assertTrue(subDir.mkdir());
         final File subFile = new File(subDir, "a.txt");
         if (!subFile.getParentFile().exists()) {
             throw new IOException("Cannot create file " + subFile
                     + " as the parent directory does not exist");
         }
         try (BufferedOutputStream output =
                 new BufferedOutputStream(Files.newOutputStream(subFile.toPath()))) {
             TestUtils.generateTestData(output, 16);
         }
 
         assertTrue(subDir.exists());
         assertTrue(subFile.exists());
         // delete dir
         assertFalse(FileDeleteStrategy.NORMAL.deleteQuietly(subDir));
         assertTrue(subDir.exists());
         assertTrue(subFile.exists());
         // delete file
         assertTrue(FileDeleteStrategy.NORMAL.deleteQuietly(subFile));
         assertTrue(subDir.exists());
         assertFalse(subFile.exists());
         // delete dir
         assertTrue(FileDeleteStrategy.NORMAL.deleteQuietly(subDir));
         assertFalse(subDir.exists());
         // delete dir
         assertTrue(FileDeleteStrategy.NORMAL.deleteQuietly(subDir));  // no error
         assertFalse(subDir.exists());
     }
 
     @Test
     public void testToString() {
         assertEquals("FileDeleteStrategy[Normal]", FileDeleteStrategy.NORMAL.toString());
         assertEquals("FileDeleteStrategy[Force]", FileDeleteStrategy.FORCE.toString());
     }
 }