/*
    * 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
    *
    *      https://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.codec;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  import java.nio.charset.Charset;
  import java.nio.charset.StandardCharsets;
  import java.util.Collection;
  import java.util.SortedSet;
  import java.util.TreeSet;
  
  import org.junit.jupiter.api.Test;
  
  /**
   * Sanity checks for {@link Charsets}.
   */
  class CharsetsTest {
  
      private static final TreeSet<String> AVAILABLE_CHARSET_NAMES = new TreeSet<>(Charset.availableCharsets().keySet());
  
      public static SortedSet<String> getAvailableCharsetNames() {
          return AVAILABLE_CHARSET_NAMES;
      }
  
      public static Collection<Charset> getRequiredCharsets() {
          return org.apache.commons.io.Charsets.requiredCharsets().values();
      }
  
      @Test
      void testDeprecatedConstructor() {
          new Charsets();
      }
  
      @SuppressWarnings("deprecation")
      @Test
      void testIso8859_1() {
          assertEquals("ISO-8859-1", Charsets.ISO_8859_1.name());
      }
  
      @Test
      void testToCharset() {
          assertEquals(Charset.defaultCharset(), Charsets.toCharset((String) null));
          assertEquals(Charset.defaultCharset(), Charsets.toCharset((Charset) null));
          assertEquals(Charset.defaultCharset(), Charsets.toCharset(Charset.defaultCharset()));
          assertEquals(StandardCharsets.UTF_8, Charsets.toCharset(StandardCharsets.UTF_8));
      }
  
      @SuppressWarnings("deprecation")
      @Test
      void testUsAscii() {
          assertEquals(StandardCharsets.US_ASCII.name(), Charsets.US_ASCII.name());
      }
  
      @SuppressWarnings("deprecation")
      @Test
      void testUtf16() {
          assertEquals(StandardCharsets.UTF_16.name(), Charsets.UTF_16.name());
      }
  
      @SuppressWarnings("deprecation")
      @Test
      void testUtf16Be() {
          assertEquals(StandardCharsets.UTF_16BE.name(), Charsets.UTF_16BE.name());
      }
  
      @SuppressWarnings("deprecation")
      @Test
      void testUtf16Le() {
          assertEquals(StandardCharsets.UTF_16LE.name(), Charsets.UTF_16LE.name());
      }
  
      @SuppressWarnings("deprecation")
      @Test
      void testUtf8() {
          assertEquals(StandardCharsets.UTF_8.name(), Charsets.UTF_8.name());
      }
  
  }