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.kafka.common.security.oauthbearer;
  
  import org.apache.kafka.common.internals.SecurityManagerCompatibility;
  import org.apache.kafka.common.security.oauthbearer.internals.OAuthBearerSaslClientCallbackHandler;
  
  import org.junit.jupiter.api.Test;
  
  import java.io.IOException;
  import java.util.Collections;
  import java.util.Set;
  import java.util.concurrent.CompletionException;
  
  import javax.security.auth.Subject;
  import javax.security.auth.callback.Callback;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  
  public class OAuthBearerSaslClientCallbackHandlerTest {
      private static OAuthBearerToken createTokenWithLifetimeMillis(final long lifetimeMillis) {
          return new OAuthBearerToken() {
              @Override
              public String value() {
                  return null;
              }
  
              @Override
              public Long startTimeMs() {
                  return null;
              }
  
              @Override
              public Set<String> scope() {
                  return null;
              }
  
              @Override
              public String principalName() {
                  return null;
              }
  
              @Override
              public long lifetimeMs() {
                  return lifetimeMillis;
              }
          };
      }
  
      @Test
      public void testWithZeroTokens() {
          OAuthBearerSaslClientCallbackHandler handler = createCallbackHandler();
          CompletionException e = assertThrows(CompletionException.class, () -> SecurityManagerCompatibility.get().callAs(new Subject(),
              () -> {
                  OAuthBearerTokenCallback callback = new OAuthBearerTokenCallback();
                  handler.handle(new Callback[] {callback});
                  return null;
              }
          ));
          assertEquals(IOException.class, e.getCause().getClass());
      }
  
      @Test()
      public void testWithPotentiallyMultipleTokens() {
          OAuthBearerSaslClientCallbackHandler handler = createCallbackHandler();
          SecurityManagerCompatibility.get().callAs(new Subject(), () -> {
              final int maxTokens = 4;
              final Set<Object> privateCredentials = SecurityManagerCompatibility.get().current()
                      .getPrivateCredentials();
              privateCredentials.clear();
              for (int num = 1; num <= maxTokens; ++num) {
                  privateCredentials.add(createTokenWithLifetimeMillis(num));
                  OAuthBearerTokenCallback callback = new OAuthBearerTokenCallback();
                  handler.handle(new Callback[] {callback});
                  assertEquals(num, callback.token().lifetimeMs());
              }
              return null;
          });
      }
  
      private static OAuthBearerSaslClientCallbackHandler createCallbackHandler() {
          OAuthBearerSaslClientCallbackHandler handler = new OAuthBearerSaslClientCallbackHandler();
          handler.configure(Collections.emptyMap(), OAuthBearerLoginModule.OAUTHBEARER_MECHANISM,
                  Collections.emptyList());
          return handler;
      }
  }
  