问题描述
我正在为 bpmn 流程使用 Kogito 服务（spring boot kogito starter 是我使用的 maven 依赖项），并且作为流程的一部分，我使用口水。如果只想独立测试规则，我无法确定要使用的单元测试配置。
例如如果我尝试在我的测试配置中创建 KieServices，则会出现我不知道如何过去的异常。
KieBuilder kieBuilder = kieServices.newKieBuilder(kieFileSystem);
kieBuilder.buildAll();
从 Junit Test 类中执行上述块时的异常：
java.lang.RuntimeException: You're trying to compile a Drools asset without mvel. Please add the module org.drools:drools-mvel to your classpath.
at org.drools.core.base.CoreComponentsBuilder.throwExceptionForMissingMvel(CoreComponentsBuilder.java:34)
at org.drools.compiler.compiler.Dialect$DummyDialect.getBuilder(Dialect.java:216)
at org.drools.compiler.rule.builder.PatternBuilder.processSource(PatternBuilder.java:348)
at org.drools.compiler.rule.builder.PatternBuilder.build(PatternBuilder.java:166)
at org.drools.compiler.rule.builder.PatternBuilder.build(PatternBuilder.java:134)
at org.drools.compiler.rule.builder.PatternBuilder.build(PatternBuilder.java:116)
at org.drools.compiler.rule.builder.GroupElementBuilder.build(GroupElementBuilder.java:66)
at org.drools.compiler.rule.builder.RuleBuilder.build(RuleBuilder.java:106)
at org.drools.compiler.builder.impl.KNowledgeBuilderImpl.internalAddRule(KNowledgeBuilderImpl.java:1186)
at org.drools.compiler.builder.impl.KNowledgeBuilderImpl.addRule(KNowledgeBuilderImpl.java:1181)
at org.drools.compiler.builder.impl.KNowledgeBuilderImpl.compileRulesLevel(KNowledgeBuilderImpl.java:1159)
at org.drools.compiler.builder.impl.KNowledgeBuilderImpl.compileRules(KNowledgeBuilderImpl.java:1107)
at org.drools.compiler.builder.impl.KNowledgeBuilderImpl.compileKNowledgePackages(KNowledgeBuilderImpl.java:925)
at org.drools.compiler.builder.impl.KNowledgeBuilderImpl.buildrules(KNowledgeBuilderImpl.java:2477)
at org.drools.compiler.builder.impl.KNowledgeBuilderImpl.buildPackages(KNowledgeBuilderImpl.java:2405)
at org.drools.compiler.builder.impl.CompositeKNowledgeBuilderImpl.build(CompositeKNowledgeBuilderImpl.java:105)
at org.drools.compiler.builder.impl.CompositeKNowledgeBuilderImpl.build(CompositeKNowledgeBuilderImpl.java:97)
at org.drools.compiler.kie.builder.impl.AbstractKieProject.buildKNowledgePackages(AbstractKieProject.java:268)
at org.drools.compiler.kie.builder.impl.AbstractKieProject.buildKNowledgePackages(AbstractKieProject.java:216)
at org.drools.compiler.kie.builder.impl.AbstractKieProject.verify(AbstractKieProject.java:80)
at org.drools.compiler.kie.builder.impl.KieBuilderImpl.buildKieProject(KieBuilderImpl.java:277)
at org.drools.compiler.kie.builder.impl.KieBuilderImpl.buildAll(KieBuilderImpl.java:245)
at org.drools.compiler.kie.builder.impl.KieBuilderImpl.buildAll(KieBuilderImpl.java:192)
at com.anthem.systemy.codeset.RulesUtil.compile(RulesUtil.java:90)
at com.anthem.systemy.codeset.RuleTest.test_drl(RuleTest.java:62)
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:59)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.springframework.test.context.junit4.statements.RunBeforeTestExecutionCallbacks.evaluate(RunBeforeTestExecutionCallbacks.java:74)
at org.springframework.test.context.junit4.statements.RunAfterTestExecutionCallbacks.evaluate(RunAfterTestExecutionCallbacks.java:84)
at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runchild(SpringJUnit4ClassRunner.java:251)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runchild(SpringJUnit4ClassRunner.java:97)
at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
at org.junit.runners.ParentRunner.runchildren(ParentRunner.java:329)
at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at org.junit.runner.JUnitCore.run(JUnitCore.java:115)
at org.junit.vintage.engine.execution.RunnerExecutor.execute(RunnerExecutor.java:43)
at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184)
at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
at java.util.Iterator.forEachRemaining(Iterator.java:116)
at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801)
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481)
at java.util.stream.AbstractPipeline.wrapAndcopyInto(AbstractPipeline.java:471)
at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151)
at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174)
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:418)
at org.junit.vintage.engine.VintageTestEngine.executeallChildren(VintageTestEngine.java:82)
at org.junit.vintage.engine.VintageTestEngine.execute(VintageTestEngine.java:73)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:229)
at org.junit.platform.launcher.core.DefaultLauncher.lambda$execute$6(DefaultLauncher.java:197)
at org.junit.platform.launcher.core.DefaultLauncher.withInterceptedStreams(DefaultLauncher.java:211)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:191)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:137)
at org.eclipse.jdt.internal.junit5.runner.junit5TestReference.run(junit5TestReference.java:89)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:41)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:541)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:763)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:463)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:209)
解决方法
将drools-mvel 添加到您的maven 项目（如果是maven）：
<dependency>
<groupId>org.drools</groupId>
<artifactId>drools-mvel</artifactId>
<version>${drools.version}</version>
</dependency>