我正在为某个方法编写junit代码。在这个方法中，需要为完整的代码覆盖率设置私有的最终值。但我得到的方法抛出了“java.lang.illegalargumentexception”异常

@Test
    void partitionProcessorTest() throws Exception {

        EventData eventData = new EventData(body);

        //  below line code for finding nested class
        Class<?> []clazz = eventData.getClass().getDeclaredClasses();

        // and this is my inner class object 
        Class<?> inner = clazz[0];

        // this is my inner class constructer 
        Constructor<?> constructor = inner.getDeclaredConstructor();
        constructor.setAccessible(true);
        Object obj = constructor.newInstance();

        // this is my sequenceNumber field. which is private final Long type, in inner class 
        Field f = inner.getDeclaredField("sequenceNumber");
        f.setAccessible(true);

        //I am trying to remove final keyword from declared field in my inner class
        Field filed= Field.class.getDeclaredField("modifiers");
        filed.setAccessible(true);
        filed.setInt(f, f.getModifiers() & ~Modifier.FINAL);

        // but iam getting exception, where i am donig mistake please suggest me  
        // In this line i am getting exception --> f.setLong(eventData , 10l);
        try{
        f.setLong(eventData , 10l);
        }
        catch(Throwable e)
        {
        e.printStackTrace();
        }
        System.out.println(obj);
    }

这是我的异常日志
java.lang.illegalargumentexception:无法在sun.reflect.unsafefieldaccessorimpl.throwsetillegalargumentexception（unsafefieldaccessorimpl）上将java.lang.long field com.azure.messaging.eventhubs.eventdata$systemproperties.sequencenumber设置为（long）10。java:167)在sun.reflect.unsafefieldaccessorimpl.throwsetillegalargumentexception（unsafefieldaccessorimpl。java:195)在sun.reflect.unsafeobjectfieldaccessorimpl.setlong（unsafeobjectfieldaccessorimpl。java:120)在java.lang.reflect.field.setlong（field。java:986)在com.tdchannels.sdk.ms.channel.services.impl.eventhubconsumerserviceimpltest.partitionprocessortest（eventhubconsumerserviceimpltest）。java:69)在sun.reflect.nativemethodaccessorimpl.invoke0（本机方法）在sun.reflect.nativemethodaccessorimpl.invoke（nativemethodaccessorimpl）。java:62)在sun.reflect.delegatingmethodaccessorimpl.invoke（delegatingmethodaccessorimpl。java:43)在java.lang.reflect.method.invoke（方法。java:498)位于org.junit.platform.commons.util.reflectionutils.invokemethod（reflectionutils。java:675)在org.junit.jupiter.engine.execution.methodinvocation.procedue（methodinvocation。java:60)在org.junit.jupiter.engine.execution.invocationinterceptorchain$validatinginvocation.procedue（invocationinterceptorchain。java:125)在org.junit.jupiter.engine.extension.timeoutextension.intercept（timeoutextension。java:132)在org.junit.jupiter.engine.extension.timeoutextension.intercepttestablemethod（timeoutextension。java:124)在junit.jupiter.engine.extension.timeoutextension.intercepttestmethod（timeoutextension。java:74)位于org.junit.jupiter.engine.execution.executableinvoker$reflectiveinterceptorcall.lambda$ofvoidmethod$0（executableinvoker）。java:115)位于org.junit.jupiter.engine.execution.executableinvoker.lambda$invoke$0（executableinvoker）。java:105)在org.junit.jupiter.engine.execution.invocationinterceptorchain$interceptedinvocation.procedue（invocationinterceptorchain。java:104)在org.junit.jupiter.engine.execution.invocationinterceptorchain.procedue（invocationinterceptorchain。java:62)在junit.jupiter.engine.execution.invocationinterceptorchain.chainandinvoke（invocationinterceptorchain。java:43)在org.junit.jupiter.engine.execution.invocationinterceptorchain.invoke（invocationinterceptorchain。java:35)在org.junit.jupiter.engine.execution.executableinvoker.invoke（executableinvoker。java:104)在org.junit.jupiter.engine.execution.executableinvoker.invoke（executableinvoker。java:98)位于org.junit.jupiter.engine.descriptor.testmethodtestdescriptor.lambda$invoketestmethod$6（testmethodtestdescriptor）。java:202)在org.junit.platform.engine.support.hierarchical.throwablecollector.execute（throwablecollector。java:73)在junit.jupiter.engine.descriptor.testmethodtestdescriptor.invoketestmethod（testmethodtestdescriptor）。java:198)在org.junit.jupiter.engine.descriptor.testmethodtestdescriptor.execute（testmethodtestdescriptor。java:135)在org.junit.jupiter.engine.descriptor.testmethodtestdescriptor.execute（testmethodtestdescriptor。java:69)在org.junit.platform.engine.support.hierarchy.nodetesttask.lambda$execute执行$5（nodetesttask。java:135)在org.junit.platform.engine.support.hierarchical.throwablecollector.execute（throwablecollector。java:73)在org.junit.platform.engine.support.hierarchy.nodetesttask.lambda$executecursively$7（nodetesttask。java:125)在org.junit.platform.engine.support.hierarchy.node.around（节点。java:135)在org.junit.platform.engine.support.hierarchy.nodetesttask.lambda$executecursively$8（nodetesttask。java:123)在org.junit.platform.engine.support.hierarchical.throwablecollector.execute（throwablecollector。java:73)在org.junit.platform.engine.support.hierarchical.nodetesttask.executeRecursive（nodetesttask。java:122)在org.junit.platform.engine.support.hierarchy.nodetesttask.execute（nodetesttask。java:80)在java.util.arraylist.foreach（arraylist。java:1249)在org.junit.platform.engine.support.hierarchical.samethreadherarchicaltestexecutorservice.invokeall（samethreadherarchicaltestexecutorservice）。java:38)在org.junit.platform.engine.support.hierarchy.nodetesttask.lambda$executecursively$5（nodetesttask。java:139)在org.junit.platform.engine.support.hierarchical.throwablecollector.execute（throwablecollector。java:73)在org.junit.platform.engine.support.hierarchy.nodetesttask.lambda$executecursively$7（nodetesttask。java:125)在org.junit.platform.engine.support.hierarchy.node.around（node。java:135)在org.junit.platform.engine.support.hierarchy.nodetesttask.lambda$execute执行$8（nodetesttask。java:123)在org.junit.platform.engine.support.hierarchical.throwablecollector.execute（throwablecollector。java:73)位于org.junit.platform.engine.support.hierarchical.nodetesttask.executerecursively（nodetesttask。java:122)在org.junit.platform.engine.support.hierarchy.nodetesttask.execute（nodetesttask。java:80)在java.util.arraylist.foreach（arraylist。java:1249)位于org.junit.platform.engine.support.hierarchical.samethreadherarchicaltestexecutorservice.invokeall（samethreadherarchicaltestexecutorservice）。java:38)在org.junit.platform.engine.support.hierarchy.nodetesttask.lambda$execute执行$5（nodetesttask。java:139)在org.junit.platform.engine.support.hierarchical.throwablecollector.execute（throwablecollector。java:73)在org.junit.platform.engine.support.hierarchy.nodetesttask.lambda$executecursively$7（nodetesttask。java:125)在org.junit.platform.engine.support.hierarchy.node.around（节点。java:135)在org.junit.platform.engine.support.hierarchy.nodetesttask.lambda$executecursively$8（nodetesttask。java:123)在org.junit.platform.engine.support.hierarchical.throwablecollector.execute（throwablecollector。java:73)在org.junit.platform.engine.support.hierarchical.nodetesttask.executeRecursive（nodetesttask。java:122)在org.junit.platform.engine.support.hierarchy.nodetesttask.execute（nodetesttask。java:80)位于org.junit.platform.engine.support.hierarchical.samethreadherarchicaltestexecutorservice.submit（samethreadherarchicaltestexecutorservice）。java:32)在org.junit.platform.engine.support.hierarchical.hierarchicaltestexecutor.execute（hierarchicaltestexecutor。java:57)在org.junit.platform.engine.support.hierarchical.hierarchicaltestengine.execute（hierarchicaltestengine。java:51)在org.junit.platform.launcher.core.defaultlauncher.execute（defaultlauncher。java:170)在org.junit.platform.launcher.core.defaultlauncher.execute（defaultlauncher。java:154)在org.junit.platform.launcher.core.defaultlauncher.execute（defaultlauncher。java:90)位于org.gradle.api.internal.tasks.testing.junitplatform.junitplatformtestclassprocessor$collectalltestclassesexecutor.processalltestclasses（junitplatformtestclassprocessor）。java:102) 在org.gradle.api.internal.tasks.testing.junitplatform.junitplatformtestclassprocessor$collectalltestclassesexecutor.access$000（junitplatformtestclassprocessor。java:82)位于org.gradle.api.internal.tasks.testing.junitplatform.junitplatformtestclassprocessor.stop（junitplatformtestclassprocessor）。java:78)在org.gradle.api.internal.tasks.testing.suitetestclassprocessor.stop（suitetestclassprocessor。java:61)在sun.reflect.nativemethodaccessorimpl.invoke0（本机方法）在sun.reflect.nativemethodaccessorimpl.invoke（nativemethodaccessorimpl）。java:62)在sun.reflect.delegatingmethodaccessorimpl.invoke（delegatingmethodaccessorimpl。java:43)在java.lang.reflect.method.invoke（方法。java:498)在org.gradle.internal.dispatch.reflectiondispatch.dispatch（reflectiondispatch。java:35)在org.gradle.internal.dispatch.reflectiondispatch.dispatch（reflectiondispatch。java:24)在org.gradle.internal.dispatch.contextclassloaderdispatch.dispatch（contextclassloaderdispatch。java:32)在org.gradle.internal.dispatch.proxydispatchadapter$dispatchinginvocationhandler.invoke（proxydispatchadapter）。java:93)com.sun.proxy.$proxy2.stop（未知源）org.gradle.api.internal.tasks.testing.worker.testworker.stop（testworker）。java:132)位于sun.reflect.nativemethodaccessorimpl.invoke0（本机方法）sun.reflect.nativemethodaccessorimpl.invoke（nativemethodaccessorimpl。java:62)在sun.reflect.delegatingmethodaccessorimpl.invoke（delegatingmethodaccessorimpl。java:43)在java.lang.reflect.method.invoke（方法。java:498)在org.gradle.internal.dispatch.reflectiondispatch.dispatch（reflectiondispatch。java:35)在org.gradle.internal.dispatch.reflectiondispatch.dispatch（reflectiondispatch。java:24)在org.gradle.internal.remote.internal.hub.messagehubbackedobjectconnection$dispatchwrapper.dispatch（messagehubbackedobjectconnection）。java:175)在org.gradle.internal.remote.internal.hub.messagehubbackedobjectconnection$dispatchwrapper.dispatch（messagehubbackedobjectconnection）。java:157)在org.gradle.internal.remote.internal.hub.messagehub$handler.run（messagehub。java:404)在org.gradle.internal.concurrent.executorpolicy$catchandrecordfailures.onexecute（executorpolicy。java:63)在org.gradle.internal.concurrent.managedexecutorimpl$1.run（managedexecutorimpl。java:46)

java.lang.nullpointerexception位于com.azure.messaging.eventhubs.models.eventcontext.updatecheckpoint（eventcontext）。java:101)在com.tdchannels.sdk.ms.channel.services.eventhubcummerthread.lambda$new$0（eventhubcummerthread。java:106)在com.tdchannels.sdk.ms.channel.services.impl.eventhubconsumerserviceimpltest.partitionprocessortest（eventhubconsumerserviceimpltest）。java:99)