JBehave Runner掷NullPointerException

Question

我是JBehave新手，并试图使用JUnit Runner来很好地显示Eclipse露娜中的JUnit测试结果(在Ubuntu12.04上)。我使用的是Runner1.1.2，JUnit 4.12-beta-1和JBehave 4.0-beta-9.当我右键点击我的故事文件和‘运行作为JUnit测试’，一切都是好的。但是，当我将@RunWith(JUnitReportingRunner.class)按JUnit Runner的要求放置在我的故事类的顶部时，我会得到以下错误：

java.lang.RuntimeException: java.lang.NullPointerException
at de.codecentric.jbehave.junit.monitoring.JUnitReportingRunner.run(JUnitReportingRunner.java:80)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Caused by: java.lang.NullPointerException
at de.codecentric.jbehave.junit.monitoring.JUnitScenarioReporter.afterStory(JUnitScenarioReporter.java:114)
at org.jbehave.core.reporters.DelegatingStoryReporter.afterStory(DelegatingStoryReporter.java:49)
at org.jbehave.core.reporters.ConcurrentStoryReporter.afterStory(ConcurrentStoryReporter.java:120)
at org.jbehave.core.embedder.PerformableTree.performBeforeOrAfterStories(PerformableTree.java:399)
at org.jbehave.core.embedder.StoryManager.performStories(StoryManager.java:102)
at org.jbehave.core.embedder.StoryManager.runStories(StoryManager.java:93)
at org.jbehave.core.embedder.StoryManager.runStoriesAsPaths(StoryManager.java:74)
at org.jbehave.core.embedder.Embedder.runStoriesAsPaths(Embedder.java:204)
at de.codecentric.jbehave.junit.monitoring.JUnitReportingRunner.run(JUnitReportingRunner.java:78)
... 6 more

这是我用于测试的实用程序类。一种非常基本的方法：

package org.felimar;

public abstract class StringManipulation
{
  public static boolean stringBlank(final String src)
  {
    return src.matches("^\\s*$"); //$NON-NLS-1$
  }
}

JBehave的故事文件：

Utilities for managing character strings

Narrative:
In order to easily manipulate and investigate character strings
As a development team
I want to use a group of string-related utilities

Scenario:  A string contains zero or more characters
Given a source string with value <value>
Then the method should return <return>

Examples:
|value|return|
|""|true|
|" "|true|
|"Normal Non-Blank"|false|

步骤类：

package org.felimar.steps;

import static org.felimar.StringManipulation.stringBlank;

import org.felimar.StringManipulation;
import org.jbehave.core.annotations.Given;
import org.jbehave.core.annotations.Named;
import org.jbehave.core.annotations.Then;

public class StringManipulationSteps
{
  private String m_srcString;

  public String getSrcString()
  {
    return m_srcString;
  }

  @Given("a source string with value $value")
  public void givenValue(@Named("value") final String srcString)
  {
    setSrcString(srcString);
  }

  public void setSrcString(final String srcString)
  {
    m_srcString = srcString;
  }

  @Then("the method should return $value")
  public void stringBlankRtrns(@Named("value") final boolean isBlank)
  {
    if (stringBlank(getSrcString()) != isBlank)
      throw new RuntimeException("stringBlank did not determine *" +
                                getSrcString() + "* was " + isBlank);
  }
}

最后，故事课：

package org.felimar.stories;

import static java.util.Arrays.asList;
import static org.jbehave.core.reporters.Format.CONSOLE;
import static org.jbehave.core.reporters.Format.TXT;

import java.util.List;

import org.felimar.StringManipulation;
import org.felimar.steps.StringManipulationSteps;
import org.jbehave.core.configuration.MostUsefulConfiguration;
import org.jbehave.core.junit.JUnitStories;
import org.jbehave.core.reporters.StoryReporterBuilder;
import org.jbehave.core.steps.InjectableStepsFactory;
import org.jbehave.core.steps.InstanceStepsFactory;
import org.junit.runner.RunWith;

import de.codecentric.jbehave.junit.monitoring.JUnitReportingRunner;

@RunWith(JUnitReportingRunner.class)
public class StringManipulationStories extends JUnitStories
{
  public StringManipulationStories()
  {
    super();
    super.useConfiguration(
     new MostUsefulConfiguration().useStoryReporterBuilder(
      new StoryReporterBuilder().withDefaultFormats().withFormats(
          CONSOLE, TXT)));
  }

  @Override
  public InjectableStepsFactory stepsFactory()
  {
    return new InstanceStepsFactory(configuration(),
                                   new StringManipulationSteps());
  }

  @Override
  protected List<String> storyPaths()
  {
    return asList("org/felimar/stories/StringManipulationStories.story");
  }
}

在任何代码中是否存在明显的错误，还是应该从使用beta库中退一步？

Answer 1

我发现问题在于JUnit-4.12-beta-1。我将我的Gradle构建脚本设置为4.+，所以我将它更改为指定了4.11，问题就消失了。JBehave 4.0-beta-9似乎工作得很好，所以我把它放在了原处。

我也尝试过使用JUnitReportingRunner.recommandedControls(configuredEmbedder())；作为构造函数的最后一行，但实际上它抛出了一个额外的错误。

我感谢安德烈亚斯的有益建议，他们非常感谢，并最终帮助我解决了我的问题。

亲切的问候，福丽