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.csp.sentinel.adapter.servletmethod;
  
  import com.alibaba.csp.sentinel.adapter.servlet.config.WebServletConfig;
  import com.alibaba.csp.sentinel.adapter.servlet.util.FilterUtil;
  import com.alibaba.csp.sentinel.node.ClusterNode;
  import com.alibaba.csp.sentinel.slots.block.RuleConstant;
  import com.alibaba.csp.sentinel.slots.block.flow.FlowRule;
  import com.alibaba.csp.sentinel.slots.block.flow.FlowRuleManager;
  import com.alibaba.csp.sentinel.slots.clusterbuilder.ClusterBuilderSlot;
  import com.alibaba.csp.sentinel.util.StringUtil;
  import org.junit.After;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
  import org.springframework.boot.test.context.SpringBootTest;
  import org.springframework.http.MediaType;
  import org.springframework.test.context.junit4.SpringRunner;
  import org.springframework.test.web.servlet.MockMvc;
  
  import java.util.Collections;
  
  import static org.junit.Assert.*;
  import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
  import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
  import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.*;
  
  /**
   * @author zhaoyuguang
   * @author Roger Law
   */
  @RunWith(SpringRunner.class)
  @SpringBootTest(classes = TestApplication.class,
          webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
  @AutoConfigureMockMvc
  public class CommonFilterMethodTest {
  
      private static final String HELLO_STR = "Hello!";
  
      private static final String HELLO_POST_STR = "Hello Post!";
  
      private static final String GET = "GET";
  
      private static final String POST = "POST";
  
      private static final String COLON = ":";
  
      @Autowired
      private MockMvc mvc;
  
      private void configureRulesFor(String resource, int count) {
          configureRulesFor(resource, count, "default");
      }
  
      private void configureRulesFor(String resource, int count, String limitApp) {
          FlowRule rule = new FlowRule()
                  .setCount(count)
                  .setGrade(RuleConstant.FLOW_GRADE_QPS);
          rule.setResource(resource);
          if (StringUtil.isNotBlank(limitApp)) {
              rule.setLimitApp(limitApp);
          }
          FlowRuleManager.loadRules(Collections.singletonList(rule));
      }
  
      @Test
      public void testCommonFilterMiscellaneous() throws Exception {
          String url = "/hello";
          this.mvc.perform(get(url))
                  .andExpect(status().isOk())
                  .andExpect(content().string(HELLO_STR));
  
          ClusterNode cnGet = ClusterBuilderSlot.getClusterNode(GET + COLON + url);
          assertNotNull(cnGet);
          assertEquals(1, cnGet.passQps(), 0.01);
  
  
          ClusterNode cnPost = ClusterBuilderSlot.getClusterNode(POST + COLON + url);
          assertNull(cnPost);
  
          this.mvc.perform(post(url))
                  .andExpect(status().isOk())
                  .andExpect(content().string(HELLO_POST_STR));
  
          cnPost = ClusterBuilderSlot.getClusterNode(POST + COLON + url);
          assertNotNull(cnPost);
          assertEquals(1, cnPost.passQps(), 0.01);
  
          testCommonBlockAndRedirectBlockPage(url, cnGet, cnPost);
      }
  
      private void testCommonBlockAndRedirectBlockPage(String url, ClusterNode cnGet, ClusterNode cnPost) throws Exception {
          configureRulesFor(GET + ":" + url, 0);
          // The request will be blocked and response is default block message.
          this.mvc.perform(get(url).accept(MediaType.TEXT_PLAIN))
                  .andExpect(status().isTooManyRequests())
                  .andExpect(content().string(FilterUtil.DEFAULT_BLOCK_MSG));
          assertEquals(1, cnGet.blockQps(), 0.01);
  
          // Test for post pass
          this.mvc.perform(post(url))
                  .andExpect(status().isOk())
                  .andExpect(content().string(HELLO_POST_STR));
  
          assertEquals(2, cnPost.passQps(), 0.01);
  
  
          FlowRuleManager.loadRules(null);
          WebServletConfig.setBlockPage("");
      }
  
      @After
      public void cleanUp() {
          FlowRuleManager.loadRules(null);
          ClusterBuilderSlot.resetClusterNodes();
      }
  }
  