我有三个班级 - 'ABC' 'PQR' 和 'XYZ'
ABC类
@Test
public void getModulesid() throws Exception {
Long GrpId= PQR.getExistingGroupId();
System.out.println(GrpId);
}
PQR 类
public static Long getExistingGroupId() throws Exception {
Long GrpId;
List<MsecBusGroups> busGroupsList = new ArrayList<MsecBusGroups>();
busGroupsList=XYZ.getBusGroups();
if (busGroupsList!=null){
MsecBusGroups It1=busGroupsList.get(busGroupsList.size()-1);
GrpId=It1.getId();
return GrpId;
} else {
throw new Exception("BUSINESS GROUPS LIST RETURNED IS NULL");
}
}
XYZ 类
public List<MsecBusGroups> getBusGroups() throws PersistenceException {
final String METHOD_NAME = "getBusGroups()";
LogHelper.logEntry(CLASS_NAME, METHOD_NAME);
List<MsecBusGroups> list = null;
try {
Query q = em.createNamedQuery("getBusGroups");
list = q.getResultList();
if (list == null) {
LogHelper.debug(CLASS_NAME, METHOD_NAME, "No Record Found");
}
...
}
当我在 ABC 类中运行测试方法时，它会抛出java.lang.NullPointerException.
java.lang.NullPointerException
at com.causeway.platform.security.model.actions.BusServiceActions.getExistingGroupId(BusServiceActions.java:202)
at com.causeway.platform.security.model.serviceImpl.SecurityBusServiceTest.testDeleteModule(SecurityBusServiceTest.java:1231)
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.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:74)
at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:83)
at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:72)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:231)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:71)
at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:174)
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)