content: /*
   * Copyright 1999-2018 Alibaba Group Holding Ltd.
   *
   * Licensed 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.alibaba.nacos.prometheus.controller;
  
  import com.alibaba.nacos.api.exception.NacosException;
  import com.alibaba.nacos.api.naming.pojo.Instance;
  import com.alibaba.nacos.api.naming.utils.NamingUtils;
  import com.alibaba.nacos.common.utils.JacksonUtils;
  import com.alibaba.nacos.naming.core.InstanceOperatorClientImpl;
  import com.alibaba.nacos.naming.core.v2.ServiceManager;
  import com.alibaba.nacos.naming.core.v2.pojo.Service;
  import com.alibaba.nacos.prometheus.api.ApiConstants;
  import org.junit.jupiter.api.AfterEach;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.extension.ExtendWith;
  import org.mockito.InjectMocks;
  import org.mockito.Mock;
  import org.mockito.junit.jupiter.MockitoExtension;
  import org.springframework.mock.web.MockHttpServletResponse;
  import org.springframework.test.web.servlet.MockMvc;
  import org.springframework.test.web.servlet.request.MockHttpServletRequestBuilder;
  import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
  import org.springframework.test.web.servlet.setup.MockMvcBuilders;
  
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.List;
  import java.util.Map;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.mockito.Mockito.when;
  
  /**
   * {@link PrometheusController} unit tests.
   *
   * @author karsonto
   * @date 2023-02-01 10:56
   */
  @ExtendWith(MockitoExtension.class)
  public class PrometheusControllerTest {
      
      private final String nameSpace = "A";
      
      private final String group = "B";
      
      private final String name = "C";
      
      @InjectMocks
      private PrometheusController prometheusController;
      
      @Mock
      private InstanceOperatorClientImpl instanceServiceV2;
      
      private Service service;
      
      private List testInstanceList;
      
      private MockMvc mockMvc;
      
      @BeforeEach
      public void setUp() throws NoSuchFieldException, IllegalAccessException, NacosException {
          ServiceManager serviceManager = ServiceManager.getInstance();
          service = Service.newService(nameSpace, group, name);
          serviceManager.getSingleton(service);
          testInstanceList = new ArrayList<>();
          testInstanceList.add(prepareInstance("A", "127.0.0.1", 8080, Collections.singletonMap("__meta_key", "value")));
          testInstanceList.add(prepareInstance("A", "127.0.0.1", 8081, Collections.singletonMap("__meta_key", "value2")));
          mockMvc = MockMvcBuilders.standaloneSetup(prometheusController).build();
      }
      
      private Instance prepareInstance(String clusterName, String ip, int port, Map<String, String> metadata) {
          Instance instance = new Instance();
          instance.setClusterName("A");
          instance.setIp("127.0.0.1");
          instance.setPort(8080);
          instance.setMetadata(metadata);
          return instance;
      }
      
      @AfterEach
      public void tearDown() {
          ServiceManager serviceManager = ServiceManager.getInstance();
          serviceManager.removeSingleton(service);
      }
      
      @Test
      public void testMetric() throws Exception {
          when(instanceServiceV2.listAllInstances(nameSpace, NamingUtils.getGroupedName(name, group))).thenReturn(testInstanceList);
          MockHttpServletRequestBuilder builder = MockMvcRequestBuilders.get(ApiConstants.PROMETHEUS_CONTROLLER_PATH);
          MockHttpServletResponse response = mockMvc.perform(builder).andReturn().getResponse();
          assertEquals(200, response.getStatus());
          assertEquals(testInstanceList.size(), JacksonUtils.toObj(response.getContentAsString()).size());
      }
      
      @Test
      public void testMetricNamespace() throws Exception {
          when(instanceServiceV2.listAllInstances(nameSpace, NamingUtils.getGroupedName(name, group))).thenReturn(testInstanceList);
          String prometheusNamespacePath = ApiConstants.PROMETHEUS_CONTROLLER_NAMESPACE_PATH.replace("{namespaceId}", nameSpace);
          MockHttpServletRequestBuilder builder = MockMvcRequestBuilders.get(prometheusNamespacePath);
          MockHttpServletResponse response = mockMvc.perform(builder).andReturn().getResponse();
          assertEquals(200, response.getStatus());
          assertEquals(testInstanceList.size(), JacksonUtils.toObj(response.getContentAsString()).size());
      }
      
      @Test
      public void testMetricNamespaceService() throws Exception {
          when(instanceServiceV2.listAllInstances(nameSpace, NamingUtils.getGroupedName(name, group))).thenReturn(testInstanceList);
          String prometheusNamespaceServicePath = ApiConstants.PROMETHEUS_CONTROLLER_SERVICE_PATH.replace("{namespaceId}", nameSpace);
          prometheusNamespaceServicePath = prometheusNamespaceServicePath.replace("{service}", service.getName());
          MockHttpServletRequestBuilder builder = MockMvcRequestBuilders.get(prometheusNamespaceServicePath);
          MockHttpServletResponse response = mockMvc.perform(builder).andReturn().getResponse();
          assertEquals(200, response.getStatus());
          assertEquals(testInstanceList.size(), JacksonUtils.toObj(response.getContentAsString()).size());
      }
      
      @Test
      public void testEmptyMetricNamespaceService() throws Exception {
          String prometheusNamespaceServicePath = ApiConstants.PROMETHEUS_CONTROLLER_SERVICE_PATH.replace("{namespaceId}", nameSpace);
          prometheusNamespaceServicePath = prometheusNamespaceServicePath.replace("{service}", "D");  //query non-existed service
          MockHttpServletRequestBuilder builder = MockMvcRequestBuilders.get(prometheusNamespaceServicePath);
          MockHttpServletResponse response = mockMvc.perform(builder).andReturn().getResponse();
          assertEquals(200, response.getStatus());
          assertEquals(0, JacksonUtils.toObj(response.getContentAsString()).size());
      }
      
  }
  