/*
    * 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.assertThrows;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.params.ParameterizedTest;
  import org.junit.jupiter.params.provider.MethodSource;
  
  /**
   * Tests {@link FileSystemUtils}.
   */
  @SuppressWarnings("deprecation") // testing deprecated class
  public class FileSystemUtilsTest {
  
      static char[] getIllegalFileNameChars() {
          return FileSystem.getCurrent().getIllegalFileNameChars();
      }
  
      @ParameterizedTest
      @MethodSource("getIllegalFileNameChars")
      public void testGetFreeSpace_IllegalFileName(final char illegalFileNameChar) throws Exception {
          assertThrows(IllegalArgumentException.class, () -> FileSystemUtils.freeSpace("\\ \"" + illegalFileNameChar));
      }
  
      @Test
      public void testGetFreeSpace_IllegalFileNames() throws Exception {
          assertThrows(IllegalArgumentException.class, () -> FileSystemUtils.freeSpace("\\ \""));
      }
  
      @Test
      public void testGetFreeSpace_String() throws Exception {
          assertThrows(NullPointerException.class, () -> FileSystemUtils.freeSpace(null));
          assertThrows(IllegalArgumentException.class, () -> FileSystemUtils.freeSpace("this directory does not exist, at all."));
          // "" means current dir.
          assertTrue(FileSystemUtils.freeSpace("") > 0);
          assertTrue(FileSystemUtils.freeSpace("target") > 0);
          // files worked as well in previous versions.
          assertTrue(FileSystemUtils.freeSpace("pom.xml") > 0);
      }
  
      @Test
      public void testGetFreeSpaceKb() throws Exception {
          assertTrue(FileSystemUtils.freeSpaceKb() > 0);
      }
  
      @Test
      public void testGetFreeSpaceKb_long() throws Exception {
          assertTrue(FileSystemUtils.freeSpaceKb(0) > 0);
      }
  
      @Test
      public void testGetFreeSpaceKb_String() throws Exception {
          assertThrows(NullPointerException.class, () -> FileSystemUtils.freeSpaceKb(null));
          assertThrows(IllegalArgumentException.class, () -> FileSystemUtils.freeSpaceKb("this directory does not exist, at all."));
          // "" means current dir.
          assertTrue(FileSystemUtils.freeSpaceKb("") > 0);
          assertTrue(FileSystemUtils.freeSpaceKb("target") > 0);
          // files worked as well in previous versions.
          assertTrue(FileSystemUtils.freeSpaceKb("pom.xml") > 0);
      }
  
      @Test
      public void testGetFreeSpaceKb_String_long() throws Exception {
          assertThrows(NullPointerException.class, () -> FileSystemUtils.freeSpaceKb(null, 0));
          assertThrows(IllegalArgumentException.class, () -> FileSystemUtils.freeSpaceKb("this directory does not exist, at all.", 0));
          // "" means current dir.
          assertTrue(FileSystemUtils.freeSpaceKb("", 0) > 0);
          assertTrue(FileSystemUtils.freeSpaceKb("target", 0) > 0);
          // files worked as well in previous versions.
          assertTrue(FileSystemUtils.freeSpaceKb("pom.xml", 0) > 0);
      }
  
  }