java.lang.UnsupportedOperationException错误如何解决？？

[defias]

groovy的脚本置于idea中进行调试，报如下错误：
java.lang.UnsupportedOperationException
        at net.grinder.scriptengine.groovy.junit.GrinderRunner.withBeforeProcess(GrinderRunner.java:268)
        at net.grinder.scriptengine.groovy.junit.GrinderRunner.classBlock(GrinderRunner.java:207)
        at net.grinder.scriptengine.groovy.junit.GrinderRunner.run(GrinderRunner.java:169)
        at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:117)
        at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:42)
        at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:262)
        at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:84)
        at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)



版本：
groovy：
2.4.9

idea：
IntelliJ IDEA 2016.2.5
Build #IU-162.2228.15, built on October 14, 2016
Licensed to lan yu
Subscription is active until October 14, 2018
JRE: 1.8.0_112-release-287-b2 x86_64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o

[defias]

补充JDK版本：
java version "1.8.0_162"
Java(TM) SE Runtime Environment (build 1.8.0_162-b12)
Java HotSpot(TM) 64-Bit Server VM (build 25.162-b12, mixed mode)

[defias]

补充完整的脚本：
import static net.grinder.script.Grinder.grinder
import static org.junit.Assert.*
import static org.hamcrest.Matchers.*
import net.grinder.plugin.http.HTTPRequest
import net.grinder.plugin.http.HTTPPluginControl
import net.grinder.script.GTest
import net.grinder.script.Grinder
import net.grinder.scriptengine.groovy.junit.GrinderRunner
import net.grinder.scriptengine.groovy.junit.annotation.BeforeProcess
import net.grinder.scriptengine.groovy.junit.annotation.BeforeThread
// import static net.grinder.util.GrinderUtils.* // You can use this if you're using nGrinder after 3.2.3
import org.junit.Before
import org.junit.BeforeClass
import org.junit.Test
import org.junit.runner.RunWith

import java.util.Date
import java.util.List
import java.util.ArrayList

import HTTPClient.Cookie
import HTTPClient.CookieModule
import HTTPClient.HTTPResponse
import HTTPClient.NVPair

/**
 * A simple example using the HTTP plugin that shows the retrieval of a
 * single page via HTTP.
 *
 * This script is automatically generated by ngrinder.
 *
 * @author admin
 */
@RunWith(GrinderRunner)
class TestRunner {

        public static GTest test
        public static HTTPRequest request
        public static NVPair[] headers = []
        public static NVPair[] params = []
        public static Cookie[] cookies = []

        @BeforeProcess
        public static void beforeProcess() {
                HTTPPluginControl.getConnectionDefaults().timeout = 6000
                test = new GTest(1, "lq.xxxx.xxxxx")
                request = new HTTPRequest()
                // Set header datas
                List<NVPair> headerList = new ArrayList<NVPair>()
                headerList.add(new NVPair("Content-Type", "application/x-www-form-urlencoded"))
                headers = headerList.toArray()
                // Set param datas
                List<NVPair> paramList = new ArrayList<NVPair>()
                paramList.add(new NVPair("page_num", "5"))
                paramList.add(new NVPair("page_size", "3"))
                paramList.add(new NVPair("user_info", "{ \"user_id\": 4528232762800116557, \"user_name\": \"E078014212\", \"app\": 1223}"))
                paramList.add(new NVPair("app", "3"))
                params = paramList.toArray()
                grinder.logger.info("before process.");
        }

        @BeforeThread
        public void beforeThread() {
                test.record(this, "test")
                grinder.statistics.delayReports=true;
                grinder.logger.info("before thread.");
        }
       
        @Before
        public void before() {
                request.setHeaders(headers)
                cookies.each { CookieModule.addCookie(it, HTTPPluginControl.getThreadHTTPClientContext()) }
                grinder.logger.info("before thread. init headers and cookies");
        }

        @Test
        public void test() {
                HTTPResponse result = request.POST("http://lq.xxx-xxx:8293/auth/resource/getdatafieldlist", params)

                if (result.statusCode == 301 || result.statusCode == 302) {
                        grinder.logger.warn("Warning. The response may not be correct. The response code was {}.", result.statusCode);
                } else {
                        assertThat(result.statusCode, is(200));
                }
        }
}