我正在尝试为Guava（http://pitest.org/）设置PIT来进行突变征象测试，但是尝试运行它时出现以下错误。这是我得到的错误：
12:19:47 PM PIT >> INFO : Sending 32 test classes to minion
12:19:47 PM PIT >> INFO : Sent tests to minion
12:19:48 PM PIT >> INFO : MINION : 12:19:48 PM PIT >> INFO : Checking environment
12:19:48 PM PIT >> INFO : MINION : 12:19:48 PM PIT >> INFO : Found 40 tests
12:19:48 PM PIT >> INFO : MINION : 12:19:48 PM PIT >> INFO : Dependency analysis reduced number of potential tests by 0
12:19:48 PM PIT >> INFO : MINION : 12:19:48 PM PIT >> INFO : 40 tests received
12:19:53 PM PIT >> INFO : MINION : Dec 06, 2016 12:19:53 PM java.util.prefs.WindowsPreferences <init>
WARNING: Could not open/create prefs root node Software\JavaSoft\Prefs at root 0x80000002. Windows RegCreateKeyEx(...) returned error code 5.
12:19:54 PM PIT >> INFO : MINION : 12:19:54 PM PIT >> WARNING : More threads at end of test (7) testCantRemove(com.google.common.collect.AbstractIteratorTest_gwt) than start. (5)
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-12:19:54 PM PIT >> WARNING : Description [testClass=com.google.common.collect.AbstractIteratorTest_gwt, name=testCantRemove(com.google.common.collect.AbstractIteratorTest_gwt)] did not pass without mutation.
12:19:54 PM PIT >> WARNING : Description [testClass=com.google.common.collect.AbstractIteratorTest_gwt, name=testDefaultBehaviorOfNextAndHasNext(com.google.common.collect.AbstractIteratorTest_gwt)] did not pass without mutation.
12:19:54 PM PIT >> WARNING : Description [testClass=com.google.common.collect.AbstractIteratorTest_gwt, name=testDefaultBehaviorOfPeek(com.google.common.collect.AbstractIteratorTest_gwt)] did not pass without mutation.
/12:19:54 PM PIT >> WARNING : Description [testClass=com.google.common.collect.AbstractIteratorTest_gwt, name=testDefaultBehaviorOfPeekForEmptyIteration(com.google.common.collect.AbstractIteratorTest_gwt)] did not pass without mutation.
12:19:54 PM PIT >> WARNING : Description [testClass=com.google.common.collect.AbstractIteratorTest_gwt, name=testException(com.google.common.collect.AbstractIteratorTest_gwt)] did not pass without mutation.
12:19:54 PM PIT >> WARNING : Description [testClass=com.google.common.collect.AbstractIteratorTest_gwt, name=testExceptionAfterEndOfData(com.google.common.collect.AbstractIteratorTest_gwt)] did not pass without mutation.
\12:19:54 PM PIT >> WARNING : Description [testClass=com.google.common.collect.AbstractIteratorTest_gwt, name=testReentrantHasNext(com.google.common.collect.AbstractIteratorTest_gwt)] did not pass without mutation.
12:19:54 PM PIT >> WARNING : Description [testClass=com.google.common.collect.AbstractIteratorTest_gwt, name=testSneakyThrow(com.google.common.collect.AbstractIteratorTest_gwt)] did not pass without mutation.
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/12:19:54 PM PIT >> WARNING : Description [testClass=com.google.common.collect.AbstractMapEntryTest_gwt, name=testEquals(com.google.common.collect.AbstractMapEntryTest_gwt)] did not pass without mutation.
12:19:54 PM PIT >> WARNING : Description [testClass=com.google.common.collect.AbstractMapEntryTest_gwt, name=testEqualsNull(com.google.common.collect.AbstractMapEntryTest_gwt)] did not pass without mutation.
12:19:54 PM PIT >> WARNING : Description [testClass=com.google.common.collect.AbstractMapEntryTest_gwt, name=testHashCode(com.google.common.collect.AbstractMapEntryTest_gwt)] did not pass without mutation.
12:19:54 PM PIT >> WARNING : Description [testClass=com.google.common.collect.AbstractMapEntryTest_gwt, name=testHashCodeNull(com.google.common.collect.AbstractMapEntryTest_gwt)] did not pass without mutation.
12:19:54 PM PIT >> WARNING : Description [testClass=com.google.common.collect.AbstractMapEntryTest_gwt, name=testToString(com.google.common.collect.AbstractMapEntryTest_gwt)] did not pass without mutation.
12:19:54 PM PIT >> WARNING : Description [testClass=com.google.common.collect.AbstractMapEntryTest_gwt, name=testToStringNull(com.google.common.collect.AbstractMapEntryTest_gwt)] did not pass without mutation.
|12:19:54 PM PIT >> WARNING : Description [testClass=com.google.common.collect.AbstractSequentialIteratorTest_gwt, name=testBroken(com.google.common.collect.AbstractSequentialIteratorTest_gwt)] did not pass without mutation.
12:19:54 PM PIT >> WARNING : Description [testClass=com.google.common.collect.AbstractSequentialIteratorTest_gwt, name=testDoubler(com.google.common.collect.AbstractSequentialIteratorTest_gwt)] did not pass without mutation.
12:19:54 PM PIT >> WARNING : Description [testClass=com.google.common.collect.AbstractSequentialIteratorTest_gwt, name=testEmpty(com.google.common.collect.AbstractSequentialIteratorTest_gwt)] did not pass without mutation.
12:19:54 PM PIT >> WARNING : Description [testClass=com.google.common.collect.AbstractSequentialIteratorTest_gwt, name=testSampleCode(com.google.common.collect.AbstractSequentialIteratorTest_gwt)] did not pass without mutation.
12:19:54 PM PIT >> INFO : Calculated coverage in 9 seconds.
Exception in thread "main" org.pitest.help.PitHelpError: All tests did not pass without mutation when calculating line coverage. Mutation testing requires a green suite.
See http://pitest.org for more details.
at org.pitest.coverage.execute.DefaultCoverageGenerator.verifyBuildSuitableForMutationTesting(DefaultCoverageGenerator.java:109)
at org.pitest.coverage.execute.DefaultCoverageGenerator.calculateCoverage(DefaultCoverageGenerator.java:94)
at org.pitest.coverage.execute.DefaultCoverageGenerator.calculateCoverage(DefaultCoverageGenerator.java:49)
at org.pitest.mutationtest.tooling.MutationCoverage.runReport(MutationCoverage.java:110)
at org.pitest.mutationtest.tooling.EntryPoint.execute(EntryPoint.java:103)
at org.pitest.mutationtest.tooling.EntryPoint.execute(EntryPoint.java:45)
at org.pitest.mutationtest.commandline.MutationCoverageReport.runReport(MutationCoverageReport.java:76)
at org.pitest.mutationtest.commandline.MutationCoverageReport.main(MutationCoverageReport.java:45)
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 com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)
基本上，PIT无法检测到测试，或者PIT无法正常运行测试，并且所有测试都将失败。我读了这篇文章：JUnit tests pass but PIT says the suite isn't green，我认为“您的代码库是否包含可变的静态状态？（例如单例）”是问题所在，但我不知道如何解决。如果测试套件具有某些隐藏的顺序依赖性，那么如何使其能够在其上运行PIT？还是测试套件仅与PIT不兼容？
最佳答案
问题很可能是PIT正在运行GWT测试用例-从一般意义上讲，这些不是单元测试，因为代码不是在JVM中运行，而是转换为Java脚本并在浏览器中运行。
PIT仅与在运行它的测试在同一JVM中运行的代码一起使用。
如果排除番石榴gwt测试用例，PIT会更快乐。