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.metrics;
  
  import com.codahale.metrics.Histogram;
  import com.codahale.metrics.MetricRegistry;
  import org.apache.camel.Exchange;
  import org.apache.camel.Message;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.extension.ExtendWith;
  import org.mockito.InOrder;
  import org.mockito.Mock;
  import org.mockito.Mockito;
  import org.mockito.junit.jupiter.MockitoExtension;
  
  import static org.apache.camel.component.metrics.MetricsConstants.HEADER_HISTOGRAM_VALUE;
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.hamcrest.Matchers.is;
  import static org.mockito.Mockito.lenient;
  import static org.mockito.Mockito.times;
  import static org.mockito.Mockito.when;
  
  @ExtendWith(MockitoExtension.class)
  public class HistogramProducerTest {
  
      private static final String METRICS_NAME = "metrics.name";
      private static final Long VALUE = System.currentTimeMillis();
  
      @Mock
      private MetricsEndpoint endpoint;
  
      @Mock
      private MetricRegistry registry;
  
      @Mock
      private Histogram histogram;
  
      @Mock
      private Exchange exchange;
  
      @Mock
      private Message in;
  
      private HistogramProducer producer;
  
      private InOrder inOrder;
  
      @BeforeEach
      public void setUp() {
          producer = new HistogramProducer(endpoint);
          inOrder = Mockito.inOrder(endpoint, registry, histogram, exchange, in);
          lenient().when(registry.histogram(METRICS_NAME)).thenReturn(histogram);
          lenient().when(exchange.getIn()).thenReturn(in);
      }
  
      @Test
      public void testHistogramProducer() {
          assertThat(producer.getEndpoint().equals(endpoint), is(true));
      }
  
      @Test
      public void testProcessValueSet() throws Exception {
          when(endpoint.getValue()).thenReturn(VALUE);
          when(in.getHeader(HEADER_HISTOGRAM_VALUE, VALUE, Long.class)).thenReturn(VALUE);
          producer.doProcess(exchange, endpoint, registry, METRICS_NAME);
          inOrder.verify(exchange, times(1)).getIn();
          inOrder.verify(registry, times(1)).histogram(METRICS_NAME);
          inOrder.verify(endpoint, times(1)).getValue();
          inOrder.verify(in, times(1)).getHeader(HEADER_HISTOGRAM_VALUE, VALUE, Long.class);
          inOrder.verify(histogram, times(1)).update(VALUE);
          inOrder.verifyNoMoreInteractions();
      }
  
      @Test
      public void testProcessValueNotSet() throws Exception {
          Object action = null;
          when(endpoint.getValue()).thenReturn(null);
          producer.doProcess(exchange, endpoint, registry, METRICS_NAME);
          inOrder.verify(exchange, times(1)).getIn();
          inOrder.verify(registry, times(1)).histogram(METRICS_NAME);
          inOrder.verify(endpoint, times(1)).getValue();
          inOrder.verify(in, times(1)).getHeader(HEADER_HISTOGRAM_VALUE, action, Long.class);
          inOrder.verifyNoMoreInteractions();
      }
  
      @Test
      public void testProcessOverrideValue() throws Exception {
          when(endpoint.getValue()).thenReturn(VALUE);
          when(in.getHeader(HEADER_HISTOGRAM_VALUE, VALUE, Long.class)).thenReturn(VALUE + 3);
          producer.doProcess(exchange, endpoint, registry, METRICS_NAME);
          inOrder.verify(exchange, times(1)).getIn();
          inOrder.verify(registry, times(1)).histogram(METRICS_NAME);
          inOrder.verify(endpoint, times(1)).getValue();
          inOrder.verify(in, times(1)).getHeader(HEADER_HISTOGRAM_VALUE, VALUE, Long.class);
          inOrder.verify(histogram, times(1)).update(VALUE + 3);
          inOrder.verifyNoMoreInteractions();
      }
  
  }
  