Jmeter学习之While Controller

参考

https://www.cnblogs.com/richered/p/8404641.html
https://blog.csdn.net/rwang99/article/details/51160529
环境

OS: Windows 10
Jmeter: apache-jmeter-4.0
背景

今天遇到一个需要借助Jmeter的测试需求，工作流程如下：
发送Http请求开启后台任务
循环发送Http请求检测后台任务状态，若后台任务已完成则跳出循环
退出
实现思路如下：

1. 创建一个Thread Group

### 2. 在Thread Group中创建HTTP Request(相当于开启后台任务)
### 3. 使用Regular Experssion Extractor提取#2中的返回值，若状态码为200则进入下一步
### 4. 创建While Controller，Condition设置为LAST(在最后失败时跳循环)
### 5. 在While Controller中创建HTTP Request(相当于检测状态)
### 6. 在While Controller中创建Response Assertion，校验状态码是否为200
运行结果

脚本

<?xml version="1.0" encoding="UTF-8"?>
<jmeterTestPlan version="1.2" properties="4.0" jmeter="4.0 r1823414">
  <hashTree>
    <TestPlan guiclass="TestPlanGui" testclass="TestPlan" testname="while" enabled="true">
      <stringProp name="TestPlan.comments"></stringProp>
      <boolProp name="TestPlan.functional_mode">false</boolProp>
      <boolProp name="TestPlan.tearDown_on_shutdown">true</boolProp>
      <boolProp name="TestPlan.serialize_threadgroups">false</boolProp>
      <elementProp name="TestPlan.user_defined_variables" elementType="Arguments" guiclass="ArgumentsPanel" testclass="Arguments" testname="用户定义的变量" enabled="true">
        <collectionProp name="Arguments.arguments"/>
      </elementProp>
      <stringProp name="TestPlan.user_define_classpath"></stringProp>
    </TestPlan>
    <hashTree>
      <ThreadGroup guiclass="ThreadGroupGui" testclass="ThreadGroup" testname="Thread Group" enabled="true">
        <stringProp name="ThreadGroup.on_sample_error">continue</stringProp>
        <elementProp name="ThreadGroup.main_controller" elementType="LoopController" guiclass="LoopControlPanel" testclass="LoopController" testname="Loop Controller" enabled="true">
          <boolProp name="LoopController.continue_forever">false</boolProp>
          <stringProp name="LoopController.loops">1</stringProp>
        </elementProp>
        <stringProp name="ThreadGroup.num_threads">1</stringProp>
        <stringProp name="ThreadGroup.ramp_time">1</stringProp>
        <boolProp name="ThreadGroup.scheduler">false</boolProp>
        <stringProp name="ThreadGroup.duration"></stringProp>
        <stringProp name="ThreadGroup.delay"></stringProp>
      </ThreadGroup>
      <hashTree>
        <HTTPSamplerProxy guiclass="HttpTestSampleGui" testclass="HTTPSamplerProxy" testname="sogo" enabled="true">
          <elementProp name="HTTPsampler.Arguments" elementType="Arguments" guiclass="HTTPArgumentsPanel" testclass="Arguments" testname="User Defined Variables" enabled="true">
            <collectionProp name="Arguments.arguments"/>
          </elementProp>
          <stringProp name="HTTPSampler.domain">www.sogo.com</stringProp>
          <stringProp name="HTTPSampler.port">443</stringProp>
          <stringProp name="HTTPSampler.protocol">https</stringProp>
          <stringProp name="HTTPSampler.contentEncoding"></stringProp>
          <stringProp name="HTTPSampler.path">/</stringProp>
          <stringProp name="HTTPSampler.method">GET</stringProp>
          <boolProp name="HTTPSampler.follow_redirects">true</boolProp>
          <boolProp name="HTTPSampler.auto_redirects">false</boolProp>
          <boolProp name="HTTPSampler.use_keepalive">true</boolProp>
          <boolProp name="HTTPSampler.DO_MULTIPART_POST">false</boolProp>
          <stringProp name="HTTPSampler.embedded_url_re"></stringProp>
          <stringProp name="HTTPSampler.connect_timeout"></stringProp>
          <stringProp name="HTTPSampler.response_timeout"></stringProp>
        </HTTPSamplerProxy>
        <hashTree>
          <RegexExtractor guiclass="RegexExtractorGui" testclass="RegexExtractor" testname="sogo_status_code" enabled="true">
            <stringProp name="RegexExtractor.useHeaders">true</stringProp>
            <stringProp name="RegexExtractor.refname">sogoStatusCode</stringProp>
            <stringProp name="RegexExtractor.regex">HTTP/1.1 (.+?) OK</stringProp>
            <stringProp name="RegexExtractor.template">$1$</stringProp>
            <stringProp name="RegexExtractor.default"></stringProp>
            <stringProp name="RegexExtractor.match_number">1</stringProp>
          </RegexExtractor>
          <hashTree/>
        </hashTree>
        <IfController guiclass="IfControllerPanel" testclass="IfController" testname="if_sogo_status_code_ok" enabled="true">
          <stringProp name="IfController.condition">${sogoStatusCode}==&quot;200&quot;</stringProp>
          <boolProp name="IfController.evaluateAll">false</boolProp>
        </IfController>
        <hashTree>
          <WhileController guiclass="WhileControllerGui" testclass="WhileController" testname="while_cnblog_status_code_not_ok" enabled="true">
            <stringProp name="WhileController.condition">LAST</stringProp>
          </WhileController>
          <hashTree>
            <HTTPSamplerProxy guiclass="HttpTestSampleGui" testclass="HTTPSamplerProxy" testname="cnblogs" enabled="true">
              <elementProp name="HTTPsampler.Arguments" elementType="Arguments" guiclass="HTTPArgumentsPanel" testclass="Arguments" testname="User Defined Variables" enabled="true">
                <collectionProp name="Arguments.arguments"/>
              </elementProp>
              <stringProp name="HTTPSampler.domain">www.cnblogs.com</stringProp>
              <stringProp name="HTTPSampler.port">443</stringProp>
              <stringProp name="HTTPSampler.protocol">https</stringProp>
              <stringProp name="HTTPSampler.contentEncoding"></stringProp>
              <stringProp name="HTTPSampler.path">/</stringProp>
              <stringProp name="HTTPSampler.method">GET</stringProp>
              <boolProp name="HTTPSampler.follow_redirects">true</boolProp>
              <boolProp name="HTTPSampler.auto_redirects">false</boolProp>
              <boolProp name="HTTPSampler.use_keepalive">true</boolProp>
              <boolProp name="HTTPSampler.DO_MULTIPART_POST">false</boolProp>
              <stringProp name="HTTPSampler.embedded_url_re"></stringProp>
              <stringProp name="HTTPSampler.connect_timeout"></stringProp>
              <stringProp name="HTTPSampler.response_timeout"></stringProp>
            </HTTPSamplerProxy>
            <hashTree>
              <ResponseAssertion guiclass="AssertionGui" testclass="ResponseAssertion" testname="Response Assertion" enabled="true">
                <collectionProp name="Asserion.test_strings">
                  <stringProp name="49586">200</stringProp>
                </collectionProp>
                <stringProp name="Assertion.custom_message"></stringProp>
                <stringProp name="Assertion.test_field">Assertion.response_code</stringProp>
                <boolProp name="Assertion.assume_success">false</boolProp>
                <intProp name="Assertion.test_type">12</intProp>
              </ResponseAssertion>
              <hashTree/>
            </hashTree>
          </hashTree>
        </hashTree>
        <ResultCollector guiclass="ViewResultsFullVisualizer" testclass="ResultCollector" testname="View Results Tree" enabled="true">
          <boolProp name="ResultCollector.error_logging">false</boolProp>
          <objProp>
            <name>saveConfig</name>
            <value class="SampleSaveConfiguration">
              <time>true</time>
              <latency>true</latency>
              <timestamp>true</timestamp>
              <success>true</success>
              <label>true</label>
              <code>true</code>
              <message>true</message>
              <threadName>true</threadName>
              <dataType>true</dataType>
              <encoding>false</encoding>
              <assertions>true</assertions>
              <subresults>true</subresults>
              <responseData>false</responseData>
              <samplerData>false</samplerData>
              <xml>false</xml>
              <fieldNames>true</fieldNames>
              <responseHeaders>false</responseHeaders>
              <requestHeaders>false</requestHeaders>
              <responseDataOnError>false</responseDataOnError>
              <saveAssertionResultsFailureMessage>true</saveAssertionResultsFailureMessage>
              <assertionsResultsToSave>0</assertionsResultsToSave>
              <bytes>true</bytes>
              <sentBytes>true</sentBytes>
              <threadCounts>true</threadCounts>
              <idleTime>true</idleTime>
              <connectTime>true</connectTime>
            </value>
          </objProp>
          <stringProp name="filename"></stringProp>
        </ResultCollector>
        <hashTree/>
      </hashTree>
    </hashTree>
  </hashTree>
</jmeterTestPlan>