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.connect.util;
  
  import org.apache.kafka.connect.errors.ConnectException;
  
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.extension.ExtendWith;
  import org.mockito.Mock;
  import org.mockito.junit.jupiter.MockitoExtension;
  import org.mockito.junit.jupiter.MockitoSettings;
  import org.mockito.quality.Strictness;
  
  import java.time.Duration;
  import java.util.Collections;
  import java.util.Map;
  import java.util.function.Function;
  
  import static org.apache.kafka.connect.util.SharedTopicAdmin.DEFAULT_CLOSE_DURATION;
  import static org.junit.jupiter.api.Assertions.assertSame;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  import static org.mockito.ArgumentMatchers.anyMap;
  import static org.mockito.ArgumentMatchers.eq;
  import static org.mockito.Mockito.times;
  import static org.mockito.Mockito.verify;
  import static org.mockito.Mockito.when;
  
  @ExtendWith(MockitoExtension.class)
  @MockitoSettings(strictness = Strictness.STRICT_STUBS)
  public class SharedTopicAdminTest {
  
      private static final Map<String, Object> EMPTY_CONFIG = Collections.emptyMap();
  
      @Mock private TopicAdmin mockTopicAdmin;
      @Mock private Function<Map<String, Object>, TopicAdmin> factory;
  
      @Test
      public void shouldCloseWithoutBeingUsed() {
          SharedTopicAdmin sharedAdmin = new SharedTopicAdmin(EMPTY_CONFIG, factory);
  
          // When closed before being used
          sharedAdmin.close();
          // Then should not create or close admin
          verifyTopicAdminCreatesAndCloses(0);
      }
  
      @Test
      public void shouldCloseAfterTopicAdminUsed() {
          when(factory.apply(anyMap())).thenReturn(mockTopicAdmin);
          SharedTopicAdmin sharedAdmin = new SharedTopicAdmin(EMPTY_CONFIG, factory);
  
          // When used and then closed
          assertSame(mockTopicAdmin, sharedAdmin.topicAdmin());
          sharedAdmin.close();
          // Then should have created and closed just one admin
          verifyTopicAdminCreatesAndCloses(1);
      }
  
      @Test
      public void shouldCloseAfterTopicAdminUsedMultipleTimes() {
          when(factory.apply(anyMap())).thenReturn(mockTopicAdmin);
          SharedTopicAdmin sharedAdmin = new SharedTopicAdmin(EMPTY_CONFIG, factory);
  
          // When used many times and then closed
          for (int i = 0; i != 10; ++i) {
              assertSame(mockTopicAdmin, sharedAdmin.topicAdmin());
          }
          sharedAdmin.close();
          // Then should have created and closed just one admin
          verifyTopicAdminCreatesAndCloses(1);
      }
  
      @Test
      public void shouldCloseWithDurationAfterTopicAdminUsed() {
          when(factory.apply(anyMap())).thenReturn(mockTopicAdmin);
          SharedTopicAdmin sharedAdmin = new SharedTopicAdmin(EMPTY_CONFIG, factory);
  
          // When used and then closed with a custom timeout
          Duration timeout = Duration.ofSeconds(1);
          assertSame(mockTopicAdmin, sharedAdmin.topicAdmin());
          sharedAdmin.close(timeout);
          // Then should have created and closed just one admin using the supplied timeout
          verifyTopicAdminCreatesAndCloses(1, timeout);
      }
  
      @Test
      public void shouldFailToGetTopicAdminAfterClose() {
          SharedTopicAdmin sharedAdmin = new SharedTopicAdmin(EMPTY_CONFIG, factory);
  
          // When closed
          sharedAdmin.close();
          // Then using the admin should fail
          assertThrows(ConnectException.class, sharedAdmin::topicAdmin);
      }
  
      private void verifyTopicAdminCreatesAndCloses(int count) {
          verifyTopicAdminCreatesAndCloses(count, DEFAULT_CLOSE_DURATION);
      }
  
      private void verifyTopicAdminCreatesAndCloses(int count, Duration expectedDuration) {
          verify(factory, times(count)).apply(anyMap());
          verify(mockTopicAdmin, times(count)).close(eq(expectedDuration));
      }
  }