我正在使用Sirius构建一组图。图中的某些元素使用Java service methods，我想使用类似JUnit（理想情况下为JUnit 5，但这不是必需）进行测试。是否有任何示例或更好的文档来说明如何执行此操作？
我知道我可以直接测试服务方法，但是我想要的是一种强制测试通过模型本身的方法，即使用.odesign文件中指定的表达式和映射。
我已经找到并尝试使用一些Sirius内部测试基础结构－ this class是我大部分时间都在其中的地方。不幸的是，我在逆向工程该类结构中做出的所有决策时遇到了麻烦，因此我有点不知所措。我目前收到此错误：
java.lang.RuntimeException: Impossible to create the session.
at org.eclipse.sirius.tests.support.api.SiriusTestCase.createSession(SiriusTestCase.java:490)
at org.eclipse.sirius.tests.support.api.SiriusTestCase.createOrLoadAndOpenSession(SiriusTestCase.java:448)
at org.eclipse.sirius.tests.support.api.SiriusTestCase.genericSetUp(SiriusTestCase.java:393)
at org.eclipse.sirius.tests.support.api.SiriusTestCase.genericSetUp(SiriusTestCase.java:322)
at org.eclipse.sirius.tests.support.api.SiriusTestCase.genericSetUp(SiriusTestCase.java:296)
at my.test.class.setUp(ServicesTest.java:32)
at junit.framework.TestCase.runBare(TestCase.java:139)
at junit.framework.TestResult$1.protect(TestResult.java:122)
at junit.framework.TestResult.runProtected(TestResult.java:142)
at junit.framework.TestResult.run(TestResult.java:125)
at junit.framework.TestCase.run(TestCase.java:129)
at junit.framework.TestSuite.runTest(TestSuite.java:252)
at junit.framework.TestSuite.run(TestSuite.java:247)
at org.junit.internal.runners.JUnit38ClassRunner.run(JUnit38ClassRunner.java:86)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:89)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:41)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:541)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:763)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:463)
at org.eclipse.pde.internal.junit.runtime.RemotePluginTestRunner.main(RemotePluginTestRunner.java:232)
at org.eclipse.pde.internal.junit.runtime.PlatformUITestHarness.lambda$0(PlatformUITestHarness.java:45)
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:40)
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:185)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4906)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:4475)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1173)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:339)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1062)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:156)
at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:636)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:339)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:563)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:151)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:155)
at org.eclipse.pde.internal.junit.runtime.NonUIThreadTestApplication.runApp(NonUIThreadTestApplication.java:55)
at org.eclipse.pde.internal.junit.runtime.UITestApplication.runApp(UITestApplication.java:46)
at org.eclipse.pde.internal.junit.runtime.NonUIThreadTestApplication.start(NonUIThreadTestApplication.java:49)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:137)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:107)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:400)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255)
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.eclipse.equinox.launcher.Main.invokeFramework(Main.java:659)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:595)
at org.eclipse.equinox.launcher.Main.run(Main.java:1501)
at org.eclipse.equinox.launcher.Main.main(Main.java:1474)
Caused by: org.eclipse.core.runtime.CoreException: Session creation failed
at org.eclipse.sirius.business.internal.session.SessionFactoryImpl.prepareDAnalysis(SessionFactoryImpl.java:281)
at org.eclipse.sirius.business.internal.session.SessionFactoryImpl.createSessionResource(SessionFactoryImpl.java:237)
at org.eclipse.sirius.business.internal.session.SessionFactoryImpl.createSession(SessionFactoryImpl.java:89)
at org.eclipse.sirius.business.api.session.DefaultLocalSessionCreationOperation.execute(DefaultLocalSessionCreationOperation.java:71)
at org.eclipse.sirius.tests.support.api.SiriusTestCase$2.execute(SiriusTestCase.java:480)
at org.eclipse.ui.actions.WorkspaceModifyOperation.lambda$0(WorkspaceModifyOperation.java:110)
at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2295)
at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2322)
at org.eclipse.ui.actions.WorkspaceModifyOperation.run(WorkspaceModifyOperation.java:131)
at org.eclipse.sirius.tests.support.api.SiriusTestCase.createSession(SiriusTestCase.java:488)
... 49 more
Caused by: java.net.UnknownServiceException: protocol doesn't support output
at java.net.URLConnection.getOutputStream(URLConnection.java:843)
at org.eclipse.emf.ecore.resource.impl.URIHandlerImpl.createOutputStream(URIHandlerImpl.java:154)
at org.eclipse.emf.ecore.resource.impl.ExtensibleURIConverterImpl.createOutputStream(ExtensibleURIConverterImpl.java:349)
at org.eclipse.emf.ecore.resource.impl.ResourceImpl.save(ResourceImpl.java:1041)
at org.eclipse.sirius.business.internal.session.SessionFactoryImpl.prepareDAnalysis(SessionFactoryImpl.java:279)
... 58 more
总而言之，我正在寻找示例，文档，甚至只是一个API，我可以使用它们使用诸如JUnit之类的测试框架来测试Sirius表达式。
谢谢。