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 com.datastax.oss.driver.internal.core.metadata;
  
  import static org.assertj.core.api.Assertions.assertThat;
  import static org.mockito.BDDMockito.willThrow;
  import static org.mockito.Mockito.verify;
  
  import ch.qos.logback.classic.Level;
  import ch.qos.logback.classic.Logger;
  import ch.qos.logback.classic.spi.ILoggingEvent;
  import ch.qos.logback.core.Appender;
  import com.datastax.oss.driver.api.core.metadata.Node;
  import com.datastax.oss.driver.api.core.metadata.NodeStateListener;
  import com.datastax.oss.driver.api.core.session.Session;
  import org.junit.After;
  import org.junit.Before;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.mockito.ArgumentCaptor;
  import org.mockito.Captor;
  import org.mockito.Mock;
  import org.mockito.junit.MockitoJUnitRunner;
  import org.slf4j.LoggerFactory;
  
  @RunWith(MockitoJUnitRunner.Strict.class)
  public class MultiplexingNodeStateListenerTest {
  
    @Mock private NodeStateListener child1;
    @Mock private NodeStateListener child2;
    @Mock private Node node;
    @Mock private Session session;
  
    @Mock private Appender<ILoggingEvent> appender;
    @Captor private ArgumentCaptor<ILoggingEvent> loggingEventCaptor;
  
    private Logger logger;
    private Level initialLogLevel;
  
    @Before
    public void addAppenders() {
      logger = (Logger) LoggerFactory.getLogger(MultiplexingNodeStateListener.class);
      initialLogLevel = logger.getLevel();
      logger.setLevel(Level.WARN);
      logger.addAppender(appender);
    }
  
    @After
    public void removeAppenders() {
      logger.detachAppender(appender);
      logger.setLevel(initialLogLevel);
    }
  
    @Test
    public void should_register() {
      // given
      MultiplexingNodeStateListener listener = new MultiplexingNodeStateListener();
      // when
      listener.register(child1);
      listener.register(child2);
      // then
      assertThat(listener).extracting("listeners").asList().hasSize(2).contains(child1, child2);
    }
  
    @Test
    public void should_flatten_child_multiplexing_listener_via_constructor() {
      // given
      MultiplexingNodeStateListener listener =
          new MultiplexingNodeStateListener(new MultiplexingNodeStateListener(child1, child2));
      // when
      // then
      assertThat(listener).extracting("listeners").asList().hasSize(2).contains(child1, child2);
    }
  
    @Test
    public void should_flatten_child_multiplexing_listener_via_register() {
      // given
      MultiplexingNodeStateListener listener = new MultiplexingNodeStateListener();
      // when
      listener.register(new MultiplexingNodeStateListener(child1, child2));
      // then
      assertThat(listener).extracting("listeners").asList().hasSize(2).contains(child1, child2);
    }
  
    @Test
    public void should_notify_onUp() {
      // given
      MultiplexingNodeStateListener listener = new MultiplexingNodeStateListener(child1, child2);
      willThrow(new NullPointerException()).given(child1).onUp(node);
      // when
      listener.onUp(node);
      // then
      verify(child1).onUp(node);
      verify(child2).onUp(node);
      verify(appender).doAppend(loggingEventCaptor.capture());
      assertThat(loggingEventCaptor.getAllValues().stream().map(ILoggingEvent::getFormattedMessage))
          .contains(
              "Unexpected error while notifying node state listener child1 of an onUp event. (NullPointerException: null)");
    }
  
    @Test
    public void should_notify_onDown() {
      // given
      MultiplexingNodeStateListener listener = new MultiplexingNodeStateListener(child1, child2);
      willThrow(new NullPointerException()).given(child1).onDown(node);
      // when
      listener.onDown(node);
      // then
      verify(child1).onDown(node);
      verify(child2).onDown(node);
      verify(appender).doAppend(loggingEventCaptor.capture());
      assertThat(loggingEventCaptor.getAllValues().stream().map(ILoggingEvent::getFormattedMessage))
          .contains(
              "Unexpected error while notifying node state listener child1 of an onDown event. (NullPointerException: null)");
    }
  
    @Test
    public void should_notify_onAdd() {
      // given
      MultiplexingNodeStateListener listener = new MultiplexingNodeStateListener(child1, child2);
      willThrow(new NullPointerException()).given(child1).onAdd(node);
      // when
      listener.onAdd(node);
      // then
      verify(child1).onAdd(node);
      verify(child2).onAdd(node);
      verify(appender).doAppend(loggingEventCaptor.capture());
      assertThat(loggingEventCaptor.getAllValues().stream().map(ILoggingEvent::getFormattedMessage))
          .contains(
              "Unexpected error while notifying node state listener child1 of an onAdd event. (NullPointerException: null)");
    }
  
    @Test
    public void should_notify_onRemove() {
      // given
      MultiplexingNodeStateListener listener = new MultiplexingNodeStateListener(child1, child2);
      willThrow(new NullPointerException()).given(child1).onRemove(node);
      // when
      listener.onRemove(node);
      // then
      verify(child1).onRemove(node);
      verify(child2).onRemove(node);
      verify(appender).doAppend(loggingEventCaptor.capture());
      assertThat(loggingEventCaptor.getAllValues().stream().map(ILoggingEvent::getFormattedMessage))
          .contains(
              "Unexpected error while notifying node state listener child1 of an onRemove event. (NullPointerException: null)");
    }
  
    @Test
    public void should_notify_onSessionReady() {
      // given
      MultiplexingNodeStateListener listener = new MultiplexingNodeStateListener(child1, child2);
      willThrow(new NullPointerException()).given(child1).onSessionReady(session);
      // when
      listener.onSessionReady(session);
      // then
      verify(child1).onSessionReady(session);
      verify(child2).onSessionReady(session);
      verify(appender).doAppend(loggingEventCaptor.capture());
      assertThat(loggingEventCaptor.getAllValues().stream().map(ILoggingEvent::getFormattedMessage))
          .contains(
              "Unexpected error while notifying node state listener child1 of an onSessionReady event. (NullPointerException: null)");
    }
  
    @Test
    public void should_notify_close() throws Exception {
      // given
      MultiplexingNodeStateListener listener = new MultiplexingNodeStateListener(child1, child2);
      Exception child1Error = new NullPointerException();
      willThrow(child1Error).given(child1).close();
      // when
      listener.close();
      // then
      verify(child1).close();
      verify(child2).close();
      verify(appender).doAppend(loggingEventCaptor.capture());
      assertThat(loggingEventCaptor.getAllValues().stream().map(ILoggingEvent::getFormattedMessage))
          .contains(
              "Unexpected error while closing node state listener child1. (NullPointerException: null)");
    }
  }
  