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.micrometer;
  
  import java.util.Collections;
  
  import io.micrometer.core.instrument.Meter;
  import io.micrometer.core.instrument.MeterRegistry;
  import io.micrometer.core.instrument.composite.CompositeMeterRegistry;
  import io.micrometer.core.instrument.simple.SimpleMeterRegistry;
  import org.apache.camel.CamelContext;
  import org.apache.camel.Endpoint;
  import org.apache.camel.RuntimeCamelException;
  import org.apache.camel.TypeConverter;
  import org.apache.camel.spi.Registry;
  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.hamcrest.MatcherAssert.assertThat;
  import static org.hamcrest.Matchers.instanceOf;
  import static org.hamcrest.Matchers.is;
  import static org.hamcrest.Matchers.isA;
  import static org.hamcrest.Matchers.notNullValue;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  import static org.mockito.Mockito.times;
  import static org.mockito.Mockito.when;
  
  @ExtendWith(MockitoExtension.class)
  public class MicrometerComponentTest {
  
      @Mock
      private CamelContext camelContext;
  
      @Mock
      private TypeConverter typeConverter;
  
      @Mock
      private Registry camelRegistry;
  
      @Mock
      private MeterRegistry metricRegistry;
  
      @Mock
      private CompositeMeterRegistry compositeMeterRegistry;
  
      private InOrder inOrder;
  
      private MicrometerComponent component;
  
      @BeforeEach
      public void setUp() {
          component = new MicrometerComponent();
          inOrder = Mockito.inOrder(camelContext, camelRegistry, metricRegistry, typeConverter);
      }
  
      @Test
      public void testCreateNewEndpointForCounter() {
          Endpoint endpoint = new MicrometerEndpoint(null, null, metricRegistry, Meter.Type.COUNTER, "a name");
          assertThat(endpoint, is(notNullValue()));
          assertThat(endpoint, is(instanceOf(MicrometerEndpoint.class)));
      }
  
      @Test
      public void testCreateNewEndpointForHistogram() {
          Endpoint endpoint
                  = new MicrometerEndpoint(null, null, metricRegistry, Meter.Type.DISTRIBUTION_SUMMARY, "a name");
          assertThat(endpoint, is(notNullValue()));
          assertThat(endpoint, is(instanceOf(MicrometerEndpoint.class)));
      }
  
      @Test
      public void testCreateNewEndpointForTimer() {
          Endpoint endpoint = new MicrometerEndpoint(null, null, metricRegistry, Meter.Type.TIMER, "a name");
          assertThat(endpoint, is(notNullValue()));
          assertThat(endpoint, is(instanceOf(MicrometerEndpoint.class)));
      }
  
      @Test
      public void testGetMetricsType() {
          Meter.Type[] supportedTypes = { Meter.Type.COUNTER, Meter.Type.DISTRIBUTION_SUMMARY, Meter.Type.TIMER };
          for (Meter.Type type : supportedTypes) {
              assertThat(component.getMetricsType(MicrometerUtils.getName(type) + ":metrics-name"), is(type));
          }
      }
  
      @Test
      public void testGetMetricsTypeNotSet() {
          assertThat(component.getMetricsType("no-metrics-type"), is(MicrometerComponent.DEFAULT_METER_TYPE));
      }
  
      @Test
      public void testGetMetricsTypeNotFound() {
          assertThrows(RuntimeCamelException.class,
                  () -> component.getMetricsType("unknown-metrics:metrics-name"));
      }
  
      @Test
      public void testGetOrCreateMetricRegistryFoundInCamelRegistry() {
          when(camelRegistry.lookupByNameAndType("name", CompositeMeterRegistry.class)).thenReturn(null);
          when(camelRegistry.findByType(CompositeMeterRegistry.class)).thenReturn(null);
          when(camelRegistry.lookupByNameAndType("name", MeterRegistry.class)).thenReturn(metricRegistry);
          MeterRegistry result = MicrometerUtils.getOrCreateMeterRegistry(camelRegistry, "name");
          assertThat(result, is(metricRegistry));
          inOrder.verify(camelRegistry, times(1)).lookupByNameAndType("name", CompositeMeterRegistry.class);
          inOrder.verify(camelRegistry, times(1)).findByType(CompositeMeterRegistry.class);
          inOrder.verify(camelRegistry, times(1)).lookupByNameAndType("name", MeterRegistry.class);
          inOrder.verifyNoMoreInteractions();
      }
  
      @Test
      public void testGetOrCreateCompositeMetricRegistryFoundInCamelRegistry() {
          when(camelRegistry.lookupByNameAndType("name", CompositeMeterRegistry.class))
                  .thenReturn(compositeMeterRegistry);
          MeterRegistry result = MicrometerUtils.getOrCreateMeterRegistry(camelRegistry, "name");
          assertThat(result, is(compositeMeterRegistry));
          inOrder.verify(camelRegistry, times(1))
                  .lookupByNameAndType("name", CompositeMeterRegistry.class);
          inOrder.verifyNoMoreInteractions();
      }
  
      @Test
      public void testGetOrCreateMetricRegistryFoundInCamelRegistryByType() {
          when(camelRegistry.lookupByNameAndType("name", CompositeMeterRegistry.class)).thenReturn(null);
          when(camelRegistry.findByType(CompositeMeterRegistry.class)).thenReturn(Collections.singleton(null));
          when(camelRegistry.lookupByNameAndType("name", MeterRegistry.class)).thenReturn(null);
          when(camelRegistry.findByType(MeterRegistry.class)).thenReturn(Collections.singleton(metricRegistry));
          MeterRegistry result = MicrometerUtils.getOrCreateMeterRegistry(camelRegistry, "name");
          assertThat(result, is(metricRegistry));
          inOrder.verify(camelRegistry, times(1)).lookupByNameAndType("name", CompositeMeterRegistry.class);
          inOrder.verify(camelRegistry, times(1)).findByType(CompositeMeterRegistry.class);
          inOrder.verify(camelRegistry, times(1)).lookupByNameAndType("name", MeterRegistry.class);
          inOrder.verify(camelRegistry, times(1)).findByType(MeterRegistry.class);
          inOrder.verifyNoMoreInteractions();
      }
  
      @Test
      public void testGetOrCreateCompositeMetricRegistryFoundInCamelRegistryByType() {
          when(camelRegistry.lookupByNameAndType("name", CompositeMeterRegistry.class)).thenReturn(null);
          when(camelRegistry.findByType(CompositeMeterRegistry.class))
                  .thenReturn(Collections.singleton(compositeMeterRegistry));
          MeterRegistry result = MicrometerUtils.getOrCreateMeterRegistry(camelRegistry, "name");
          assertThat(result, is(compositeMeterRegistry));
          inOrder.verify(camelRegistry, times(1)).lookupByNameAndType("name", CompositeMeterRegistry.class);
          inOrder.verify(camelRegistry, times(1)).findByType(CompositeMeterRegistry.class);
          inOrder.verifyNoMoreInteractions();
      }
  
      @Test
      public void testGetMetricRegistryFromCamelRegistry() {
          when(camelRegistry.lookupByNameAndType("name", CompositeMeterRegistry.class)).thenReturn(null);
          when(camelRegistry.findByType(CompositeMeterRegistry.class)).thenReturn(null);
          when(camelRegistry.lookupByNameAndType("name", MeterRegistry.class)).thenReturn(metricRegistry);
          MeterRegistry result = MicrometerUtils.getMeterRegistryFromCamelRegistry(camelRegistry, "name");
          assertThat(result, is(metricRegistry));
          inOrder.verify(camelRegistry, times(1)).lookupByNameAndType("name", CompositeMeterRegistry.class);
          inOrder.verify(camelRegistry, times(1)).findByType(CompositeMeterRegistry.class);
          inOrder.verify(camelRegistry, times(1)).lookupByNameAndType("name", MeterRegistry.class);
          inOrder.verifyNoMoreInteractions();
      }
  
      @Test
      public void testGetCompositeMetricRegistryFromCamelRegistry() {
          when(camelRegistry.lookupByNameAndType("name", CompositeMeterRegistry.class))
                  .thenReturn(compositeMeterRegistry);
          MeterRegistry result = MicrometerUtils.getMeterRegistryFromCamelRegistry(camelRegistry, "name");
          assertThat(result, is(compositeMeterRegistry));
          inOrder.verify(camelRegistry, times(1)).lookupByNameAndType("name", CompositeMeterRegistry.class);
          inOrder.verifyNoMoreInteractions();
      }
  
      @Test
      public void testCreateMetricRegistry() {
          MeterRegistry registry = MicrometerUtils.createMeterRegistry();
          assertThat(registry, isA(SimpleMeterRegistry.class));
      }
  }
  