/*
    * 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.fileupload2.core;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  
  import java.io.UnsupportedEncodingException;
  
  import org.junit.jupiter.api.Test;
  
  /**
   * Use the online <a href="http://dogmamix.com/MimeHeadersDecoder/">MimeHeadersDecoder</a> to validate expected values.
   */
  public final class MimeUtilityTestCase {
  
      private static void assertEncoded(final String expected, final String encoded) throws Exception {
          assertEquals(expected, MimeUtils.decodeText(encoded));
      }
  
      @Test
      public void testDecodeInvalidEncoding() {
          assertThrows(UnsupportedEncodingException.class, () -> MimeUtils.decodeText("=?invalid?B?xyz-?="));
      }
  
      @Test
      public void testDecodeIso88591Base64Encoded() throws Exception {
          assertEncoded("If you can read this you understand the example.",
                  "=?ISO-8859-1?B?SWYgeW91IGNhbiByZWFkIHRoaXMgeW8=?= " + "=?ISO-8859-2?B?dSB1bmRlcnN0YW5kIHRoZSBleGFtcGxlLg==?=\"\r\n");
      }
  
      @Test
      public void testDecodeIso88591Base64EncodedWithWhiteSpace() throws Exception {
          assertEncoded("If you can read this you understand the example.",
                  "=?ISO-8859-1?B?SWYgeW91IGNhbiByZWFkIHRoaXMgeW8=?=\t  \r\n   =?ISO-8859-" + "2?B?dSB1bmRlcnN0YW5kIHRoZSBleGFtcGxlLg==?=\"\r\n");
      }
  
      @Test
      public void testDecodeUtf8Base64Encoded() throws Exception {
          assertEncoded(" h\u00e9! \u00e0\u00e8\u00f4u !!!", "=?UTF-8?B?IGjDqSEgw6DDqMO0dSAhISE=?=");
      }
  
      @Test
      public void testDecodeUtf8QuotedPrintableEncoded() throws Exception {
          assertEncoded(" h\u00e9! \u00e0\u00e8\u00f4u !!!", "=?UTF-8?Q?_h=C3=A9!_=C3=A0=C3=A8=C3=B4u_!!!?=");
      }
  
      @Test
      public void testNoNeedToDecode() throws Exception {
          assertEncoded("abc", "abc");
      }
  }