我现在正在尝试 JUnit 5，我有两个问题：
1(在调试模式下，我在空闲一段时间后遇到JVM崩溃的问题，即当我一步一步地没有停止超过3-5秒时，那么一切都很好，但是如果我停下来进行一些评估或只是因为我需要在调试期间做其他事情， 因此花费超过 10 - 15 秒，然后当我尝试进行下一步时 JVM 崩溃。
2( JUnit 5 截断堆栈跟踪，只留下一个无意义的字符串(带有测试文件的行，而不是抛出异常的实际行(。下面是此类输出的示例：
Running ru.ahml.ficb.generators.GeneratorTest
Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 3.418 sec <<< FAILURE! - in ru.ahml.ficb.generators.GeneratorTest
test Time elapsed: 3.359 sec <<< ERROR!
java.lang.NullPointerException
at ru.ahml.ficb.generators.GeneratorTest.test(GeneratorTest.java:44)
Results :
Tests in error:
GeneratorTest.test:44 » NullPointer
Tests run: 1, Failures: 0, Errors: 1, Skipped: 0
绝对不知道这个NPE发生在哪里！以下是 JUnit 4 显示的内容：
Running ru.ahml.ficb.generators.GeneratorTest
Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 3.541 sec <<< FAILURE!
test(ru.ahml.ficb.generators.GeneratorTest) Time elapsed: 3.4 sec <<< ERROR!
java.lang.NullPointerException
at ru.ahml.ficb.excel.generators.ordersgpb.Generator.fillTable(Generator.java:268)
at ru.ahml.ficb.excel.generators.ordersgpb.Generator.fillSheet(Generator.java:122)
at ru.ahml.ficb.excel.generators.ordersgpb.Generator.generate(Generator.java:64)
at ru.ahml.ficb.generators.GeneratorTest.test(GeneratorTest.java:44)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:252)
at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:141)
at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:112)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:189)
at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:165)
at org.apache.maven.surefire.booter.ProviderFactory.invokeProvider(ProviderFactory.java:85)
at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:115)
at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:75)
Results :
Tests in error:
test(ru.ahml.ficb.generators.GeneratorTest)
Tests run: 1, Failures: 0, Errors: 1, Skipped: 0
一切都清楚了！
如何使 JUnit 5 显示与 JUnit4 相同的堆栈跟踪，以及如何在使用 JUnit 5 时防止 JVM 在调试模式下崩溃？
">
JUnit 5"不会截断堆栈跟踪。
在这里，由于默认设置，Surefire确实修剪了堆栈跟踪：http://maven.apache.org/surefire/maven-surefire-plugin/test-mojo.html#trimStackTrace
将其设置为false如下所示：
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.19.1</version>
<configuration>
<trimStackTrace>false</trimStackTrace>
</configuration>
</plugin>
应防止修剪。