content: /*
   *  Copyright 1999-2021 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.core.control.http;
  
  import com.alibaba.nacos.api.remote.request.Request;
  import com.alibaba.nacos.api.remote.request.RequestMeta;
  import com.alibaba.nacos.core.code.ControllerMethodsCache;
  import com.alibaba.nacos.core.remote.HealthCheckRequestHandler;
  import com.alibaba.nacos.plugin.control.ControlManagerCenter;
  import com.alibaba.nacos.plugin.control.tps.TpsControlManager;
  import com.alibaba.nacos.plugin.control.tps.request.TpsCheckRequest;
  import com.alibaba.nacos.plugin.control.tps.response.TpsCheckResponse;
  import org.apache.catalina.core.AsyncContextImpl;
  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.Mock;
  import org.mockito.MockedStatic;
  import org.mockito.Mockito;
  import org.mockito.junit.jupiter.MockitoExtension;
  import org.springframework.mock.web.MockFilterChain;
  import org.springframework.mock.web.MockHttpServletRequest;
  import org.springframework.mock.web.MockHttpServletResponse;
  
  import jakarta.servlet.ServletRequest;
  import jakarta.servlet.ServletResponse;
  import jakarta.servlet.http.HttpServletRequest;
  import jakarta.servlet.http.HttpServletResponse;
  import java.lang.reflect.Method;
  
  import static org.mockito.ArgumentMatchers.any;
  import static org.mockito.ArgumentMatchers.eq;
  import static org.mockito.Mockito.when;
  
  @ExtendWith(MockitoExtension.class)
  class NacosHttpTpsFilterTest {
      
      NacosHttpTpsFilter nacosHttpTpsFilter;
      
      MockedStatic<ControlManagerCenter> controlManagerCenterMockedStatic;
      
      @Mock
      ControllerMethodsCache controllerMethodsCache;
      
      @Mock
      private ControlManagerCenter controlManagerCenter;
      
      @Mock
      private TpsControlManager tpsControlManager;
      
      @BeforeEach
      void before() {
          controlManagerCenterMockedStatic = Mockito.mockStatic(ControlManagerCenter.class);
          controlManagerCenterMockedStatic.when(() -> ControlManagerCenter.getInstance()).thenReturn(controlManagerCenter);
          when(controlManagerCenter.getTpsControlManager()).thenReturn(tpsControlManager);
          nacosHttpTpsFilter = new NacosHttpTpsFilter(controllerMethodsCache);
          
      }
      
      @AfterEach
      void after() {
          controlManagerCenterMockedStatic.close();
      }
      
      /**
       * test tps check passed ,response is null.
       */
      @Test
      void testPass() throws Exception {
          HttpTpsCheckRequestParserRegistry.register(new HttpTpsCheckRequestParser() {
              @Override
              public TpsCheckRequest parse(HttpServletRequest httpServletRequest) {
                  return new TpsCheckRequest();
              }
              
              @Override
              public String getPointName() {
                  return "HealthCheck";
              }
              
              @Override
              public String getName() {
                  return "HealthCheck";
              }
          });
          
          TpsCheckResponse tpsCheckResponse = new TpsCheckResponse(true, 200, "success");
          when(tpsControlManager.check(any(TpsCheckRequest.class))).thenReturn(tpsCheckResponse);
          
          //mock http tps control method
          Method method = HealthCheckRequestHandler.class.getMethod("handle", Request.class, RequestMeta.class);
          
          MockHttpServletRequest httpServletRequest = Mockito.mock(MockHttpServletRequest.class);
          MockHttpServletResponse httpServletResponse = Mockito.mock(MockHttpServletResponse.class);
          MockFilterChain filterChain = Mockito.mock(MockFilterChain.class);
          when(controllerMethodsCache.getMethod(eq(httpServletRequest))).thenReturn(method);
          Mockito.doNothing().when(filterChain).doFilter(any(ServletRequest.class), any(ServletResponse.class));
          //execute test.
          nacosHttpTpsFilter.doFilter(httpServletRequest, httpServletResponse, filterChain);
          
          //verify
          Mockito.verify(filterChain, Mockito.times(1)).doFilter(httpServletRequest, httpServletResponse);
          
      }
      
      /**
       * test tps check rejected ,response is not null.
       */
      @Test
      void testRejected() throws Exception {
          HttpTpsCheckRequestParserRegistry.register(new HttpTpsCheckRequestParser() {
              @Override
              public TpsCheckRequest parse(HttpServletRequest httpServletRequest) {
                  return new TpsCheckRequest();
              }
              
              @Override
              public String getPointName() {
                  return "HealthCheck";
              }
              
              @Override
              public String getName() {
                  return "HealthCheck";
              }
          });
          
          TpsCheckResponse tpsCheckResponse = new TpsCheckResponse(false, 5031, "rejected");
          when(tpsControlManager.check(any(TpsCheckRequest.class))).thenReturn(tpsCheckResponse);
          
          //mock http tps control method
          Method method = HealthCheckRequestHandler.class.getMethod("handle", Request.class, RequestMeta.class);
          
          MockHttpServletRequest httpServletRequest = Mockito.mock(MockHttpServletRequest.class);
          MockHttpServletResponse httpServletResponse = Mockito.mock(MockHttpServletResponse.class);
          MockFilterChain filterChain = Mockito.mock(MockFilterChain.class);
          when(controllerMethodsCache.getMethod(eq(httpServletRequest))).thenReturn(method);
          AsyncContextImpl asyncContext = Mockito.mock(AsyncContextImpl.class);
          Mockito.when(httpServletRequest.startAsync()).thenReturn(asyncContext);
          //execute test.
          nacosHttpTpsFilter.doFilter(httpServletRequest, httpServletResponse, filterChain);
          
          //verify
          Mockito.verify(filterChain, Mockito.times(0)).doFilter(any(), any());
          Thread.sleep(1100L);
          Mockito.verify(httpServletResponse, Mockito.times(1)).setStatus(HttpServletResponse.SC_SERVICE_UNAVAILABLE);
          
      }
      
      /**
       * test tps check exception ,return null skip.
       */
      @Test
      void testTpsCheckException() throws Exception {
          HttpTpsCheckRequestParserRegistry.register(new HttpTpsCheckRequestParser() {
              @Override
              public TpsCheckRequest parse(HttpServletRequest httpServletRequest) {
                  return new TpsCheckRequest();
              }
              
              @Override
              public String getPointName() {
                  return "HealthCheck";
              }
              
              @Override
              public String getName() {
                  return "HealthCheck";
              }
          });
          
          when(tpsControlManager.check(any(TpsCheckRequest.class))).thenThrow(new RuntimeException("324565"));
          
          //mock http tps control method
          Method method = HealthCheckRequestHandler.class.getMethod("handle", Request.class, RequestMeta.class);
          
          HttpServletRequest httpServletRequest = Mockito.mock(HttpServletRequest.class);
          HttpServletResponse httpServletResponse = Mockito.mock(HttpServletResponse.class);
          MockFilterChain filterChain = Mockito.mock(MockFilterChain.class);
          
          when(controllerMethodsCache.getMethod(eq(httpServletRequest))).thenReturn(method);
          //execute test.
          nacosHttpTpsFilter.doFilter(httpServletRequest, httpServletResponse, filterChain);
          
          //verify
          Mockito.verify(filterChain, Mockito.times(1)).doFilter(httpServletRequest, httpServletResponse);
          
      }
  }
  