0

有人可以告诉我为什么我的单元测试不起作用。我对单元测试很陌生。这是没有运行的查询，我不知道为什么？？？

public class ContactsServiceTest {

@Autowired
private ContactsService contactsService;

@Test
public void testGetContactsById() {
    Contacts con =  contactsService.getContactsById(59);
    assertTrue(con.getFirstName().equals("Jon"));
}

}

这是我得到的错误；

java.lang.NullPointerException
at com.logicalideas.myapp.ContactsServiceTest.testGetContactsById(ContactsServiceTest.java:45)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
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.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:76)
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.junit.runners.ParentRunner.run(ParentRunner.java:236)
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)
4

2 回答 2

1

根据您的错误堆栈跟踪，只要第 45 行是

Contacts con =  contactsService.getContactsById(59);

那么您尝试检索的 id 59 不包含任何信息或连接存在问题。

除非您发布有关系统的更多信息，否则很难弄清楚导致此问题的确切问题是什么。

于 2012-11-18T00:07:35.820 回答
0

java.lang.NullPointerException

private ContactsService contactsService = new ContactsService();

于 2012-11-18T00:04:34.437 回答