content: /*
   * 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.camel.component.mail;
  
  import jakarta.mail.internet.MimeUtility;
  
  import org.apache.camel.builder.RouteBuilder;
  import org.apache.camel.component.mail.Mailbox.MailboxUser;
  import org.apache.camel.component.mail.Mailbox.Protocol;
  import org.apache.camel.component.mock.MockEndpoint;
  import org.apache.camel.test.junit5.CamelTestSupport;
  import org.junit.jupiter.api.Test;
  
  /**
   * Unit test for Mail header decoding/unfolding support.
   */
  public class MailMimeDecodeHeadersTest extends CamelTestSupport {
      private static final MailboxUser plain = Mailbox.getOrCreateUser("plain", "secret");
      private static final MailboxUser decoded = Mailbox.getOrCreateUser("decoded", "secret");
      private String nonAsciiSubject = "\uD83D\uDC2A rocks!";
      private String encodedNonAsciiSubject = "=?UTF-8?Q?=F0=9F=90=AA_rocks!?=";
  
      private String longSubject;
      {
          StringBuilder sb = new StringBuilder("Camel rocks!");
  
          int mimeFoldingLimit = 76;
          while (sb.length() <= mimeFoldingLimit) {
              sb.insert(7, "o");
          }
          longSubject = sb.toString();
      }
      private String foldedLongSubject = MimeUtility.fold(9, longSubject);
  
      @Test
      public void testLongMailSubject() throws Exception {
          Mailbox.clearAll();
  
          // The email subject is >76 chars and will get MIME folded.
          template.sendBody("direct:longSubject", "");
  
          // When mimeDecodeHeaders=true is used, expect the received subject to be MIME unfolded.
          MockEndpoint mockDecoded = getMockEndpoint("mock:decoded");
          mockDecoded.expectedMessageCount(1);
          mockDecoded.expectedHeaderReceived("subject", longSubject);
          mockDecoded.setResultWaitTime(10000);
          mockDecoded.assertIsSatisfied();
  
          // When mimeDecodeHeaders=false or missing, expect the received subject to be MIME folded.
          MockEndpoint mockPlain = getMockEndpoint("mock:plain");
          mockPlain.expectedMessageCount(1);
          mockPlain.expectedHeaderReceived("subject", foldedLongSubject);
          mockPlain.setResultWaitTime(10000);
          mockPlain.assertIsSatisfied();
      }
  
      @Test
      public void testNonAsciiMailSubject() throws Exception {
          Mailbox.clearAll();
  
          // The email subject contains non-ascii characters and will be encoded.
          template.sendBody("direct:nonAsciiSubject", "");
  
          // When mimeDecodeHeaders=true is used, expect the received subject to be MIME encoded.
          MockEndpoint mockDecoded = getMockEndpoint("mock:decoded");
          mockDecoded.expectedMessageCount(1);
          mockDecoded.expectedHeaderReceived("subject", nonAsciiSubject);
          mockDecoded.assertIsSatisfied();
  
          // When mimeDecodeHeaders=false or missing, expect the received subject to be MIME encoded.
          MockEndpoint mockPlain = getMockEndpoint("mock:plain");
          mockPlain.expectedMessageCount(1);
          mockPlain.expectedHeaderReceived("subject", encodedNonAsciiSubject);
          mockPlain.assertIsSatisfied();
      }
  
      @Override
      protected RouteBuilder createRouteBuilder() {
          return new RouteBuilder() {
              public void configure() {
                  from("direct:longSubject")
                          .setHeader("subject", constant(longSubject))
                          .to(plain.uriPrefix(Protocol.smtp), decoded.uriPrefix(Protocol.smtp));
  
                  from("direct:nonAsciiSubject")
                          .setHeader("subject", constant(nonAsciiSubject))
                          .to(plain.uriPrefix(Protocol.smtp), decoded.uriPrefix(Protocol.smtp));
  
                  from(plain.uriPrefix(Protocol.pop3) + "&initialDelay=100&delay=100")
                          .to("mock:plain");
  
                  from(decoded.uriPrefix(Protocol.pop3) + "&initialDelay=100&delay=100&mimeDecodeHeaders=true")
                          .to("mock:decoded");
              }
          };
      }
  }
  