运行测试套件时，PowerMockito和SWT出现java不满意的链接错误

Question

我正在用JUnit和PowerMockito为Eclipse RCP应用程序中的类编写单元测试。 如果我独立运行每个测试，一切都会正常运行

但当我将测试分组到TestSuite时，所有测试都会失败，并出现以下错误：

java.lang.UnsatisfiedLinkError: Could not load SWT library. Reasons: 
    no swt-win32-3836 in java.library.path
    no swt-win32 in java.library.path
    Native Library C:\Users\franzm\.swt\lib\win32\x86_64\swt-win32-3836.dll already loaded in another classloader
    Can't load library: C:\Users\franzm\.swt\lib\win32\x86_64\swt-win32.dll

    at org.eclipse.swt.internal.Library.loadLibrary(Library.java:331)
    at org.eclipse.swt.internal.Library.loadLibrary(Library.java:240)
    at org.eclipse.swt.internal.C.<clinit>(C.java:21)
    at org.eclipse.swt.widgets.Widget.<clinit>(Widget.java:103)
    at com.example.app.client.ui.filters.FilterDtoUtil.formatDateFormat(FilterDtoUtil.java:325)
    at com.example.app.client.ui.filters.FilterDtoUtil.getMarketVariantsProductionSitesWithDates(FilterDtoUtil.java:358)
    at com.example.app.client.ui.filters.factories.FilterContributor.getFilterRow(FilterContributor.java:566)
    at com.example.app.client.ui.filters.factories.AbstractBigFilterFactory.getFilterRow(AbstractBigFilterFactory.java:59)
    at com.example.app.client.ui.excelexport.AbstractExcelTest.before(AbstractExcelTest.java:73)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.junit.internal.runners.MethodRoadie.runBefores(MethodRoadie.java:132)
    at org.junit.internal.runners.MethodRoadie.runBeforesThenTestThenAfters(MethodRoadie.java:95)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.executeTest(PowerMockJUnit44RunnerDelegateImpl.java:294)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.executeTestInSuper(PowerMockJUnit47RunnerDelegateImpl.java:127)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.executeTest(PowerMockJUnit47RunnerDelegateImpl.java:82)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.runBeforesThenTestThenAfters(PowerMockJUnit44RunnerDelegateImpl.java:282)
    at org.junit.internal.runners.MethodRoadie.runTest(MethodRoadie.java:86)
    at org.junit.internal.runners.MethodRoadie.run(MethodRoadie.java:49)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.invokeTestMethod(PowerMockJUnit44RunnerDelegateImpl.java:207)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.runMethods(PowerMockJUnit44RunnerDelegateImpl.java:146)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$1.run(PowerMockJUnit44RunnerDelegateImpl.java:120)
    at org.junit.internal.runners.ClassRoadie.runUnprotected(ClassRoadie.java:33)
    at org.junit.internal.runners.ClassRoadie.runProtected(ClassRoadie.java:45)
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.run(PowerMockJUnit44RunnerDelegateImpl.java:118)
    at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.run(JUnit4TestSuiteChunkerImpl.java:104)
    at org.powermock.modules.junit4.common.internal.impl.AbstractCommonPowerMockRunner.run(AbstractCommonPowerMockRunner.java:53)
    at org.powermock.modules.junit4.PowerMockRunner.run(PowerMockRunner.java:53)
    at org.junit.runners.Suite.runChild(Suite.java:127)
    at org.junit.runners.Suite.runChild(Suite.java:26)
    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.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:467)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

好的，我知道问题是DLL已经加载了。但我该怎么解决这个问题呢？ 我们在堆栈溢出（when use junit4 + powermock to execute all test suites , I got an error : swt-win32-3650.dll already loaded in another classloader）上有一个答案，但这对我一点帮助都没有。找到所有可能使用SWT的类对于获得结果来说是非常困难的

难道没有更好的解决办法吗

（编辑：我使用PowerMockito模拟静态类）