无法初始化io.cucumber.core.options.PluginOption类

如何解决无法初始化io.cucumber.core.options.PluginOption类

我有一段Cucumber + JUNIT + Selenium WebDriver代码在JMeter中用于负载测试。 以下是一段代码：

package runner;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.junit.Test;
import cucumber.api.cli.Main;
import pageobjects.alinea.AssetsMetadataPage;

public class TestRunner{
private static Logger Log = LogManager.getLogger(AssetsMetadataPage.class);

public ClassLoader load;

public TestRunner(String str) {
    // TODO Auto-generated constructor stub
    
    this();
}
public TestRunner() {
    // TODO Auto-generated constructor stub
}
// Test method is defined with Cucumber Main run method. 
// "-g" signifies glue code (package where the code is),"-t" signifies the tag.  The location of the feature file which defines the test scripts 


@Test
public void runTest() throws Throwable {
try {

        Main.run(new String[]{"-g","step_definitions","-t","@upload","src/test/resources/features/addcontent.feature"},ClassLoader.getSystemClassLoader());
        //log.info("Print");
        Log.info("Print");
    } catch (Exception e) {
        e.printStackTrace();
    }
}
// Post Test what the JUNIT test needs to do
}

这是功能文件：

@Upload
Scenario: User upload the image
Given navigate to folder and upload a picture

并将这些jar导入到jmeter的lib文件夹中：

junit-4.13.jar
cobertura-1.8.jar
mockito-core-3.5.5.jar
cucumber-core-5.7.0.jar
cucumber-java-5.7.0.jar
cucumber-junit-5.7.0.jar
cucumber-jvm-deps-1.0.6.jar
gherkin-15.0.2.jar
selenium-server-standalone-2.53.0.jar

当我尝试从Eclipse运行时，没有问题，执行完成没有任何故障。 但是当我从jmeter运行此程序时出现以下错误：

**Error -- runTest(org.apache.jmeter.protocol.java.sampler.JUnitSampler$AnnotatedTestCase): io/cucumber/plugin/SummaryPrinter
Trace -- java.lang.NoClassDefFoundError: io/cucumber/plugin/SummaryPrinter
    at java.base/java.lang.ClassLoader.defineClass1(Native Method)
    at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1017)
    at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:174)
    at java.base/java.net.URLClassLoader.defineClass(URLClassLoader.java:550)
    at java.base/java.net.URLClassLoader$1.run(URLClassLoader.java:458)
    at java.base/java.net.URLClassLoader$1.run(URLClassLoader.java:452)
    at java.base/java.security.AccessController.doPrivileged(Native Method)
    at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:451)
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:589)
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
    at io.cucumber.core.options.PluginOption$1.<init>(PluginOption.java:37)
    at io.cucumber.core.options.PluginOption.<clinit>(PluginOption.java:36)
    at io.cucumber.core.options.RuntimeOptions.addDefaultFormatterIfAbsent(RuntimeOptions.java:60)
    at io.cucumber.core.options.RuntimeOptionsBuilder.build(RuntimeOptionsBuilder.java:132)
    at io.cucumber.core.cli.Main.run(Main.java:61)
    at runner.TestRunner.runTest(TestRunner.java:31)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:566)
    at org.apache.jmeter.protocol.java.sampler.JUnitSampler$AnnotatedTestCase.runTest(JUnitSampler.java:595)
    at junit.framework.TestResult.runProtected(TestResult.java:142)
    at org.apache.jmeter.protocol.java.sampler.JUnitSampler.sample(JUnitSampler.java:395)
    at org.apache.jmeter.threads.JMeterThread.doSampling(JMeterThread.java:630)
    at org.apache.jmeter.threads.JMeterThread.executeSamplePackage(JMeterThread.java:558)
    at org.apache.jmeter.threads.JMeterThread.processSampler(JMeterThread.java:489)
    at org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:256)
    at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: java.lang.ClassNotFoundException: io.cucumber.plugin.SummaryPrinter
    at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:471)
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:589)
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
    ... 28 more**

**

我是否缺少在jmeter中为黄瓜选项添加的内容？预先感谢您的回答！

解决方法

我认为您无法在JMeter中运行Cucumber测试，因为JMeter的JUnit Sampler使用Java Reflection API来依次调用以JUnit annotations和Cucumber注释的功能在运行时从功能文件生成Java类，并且此行为与JMeter不兼容。

因此，与其使用真实的浏览器进行性能测试，我不建议将您的Cucumber测试转换为“纯” JMeter测试，足以通过HTTP(S) Test Script Recorder通过JMeter的configuring the proxy in your Selenium code运行它，您将获得HTTP Request采样器将执行文件上传。

在执行之前，请务必确保将您的Cucumber测试将要上传的文件复制到JMeter安装的“ bin”文件夹中，否则JMeter将无法正确捕获请求，请参阅Recording File Uploads with JMeter文章有关更多详细信息。

最后但并非最不重要的一点是，现代浏览器占用大量资源，例如Firefox 78 requires 1 CPU core and 2GB of RAM 每个浏览器实例，并且使用JMeter，您只需一次即可轻松模拟数百个虚拟用户浏览器