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我是junit和TDD的新手。

我刚刚制作了我的第一个测试用例。

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = {"classpath:spring-beans/spring-cms-root.xml"})
public class MemberServiceImplTest {

    @Autowired
    MemberService memberService;

    @Test
    public void testGetMemberById() {
        Member member = memberService.getMemberById("testid");
        assertTrue(member != null);
    }

    @Test
    public void testGetMemberBySeq() {
        Member member = memberService.getMemberBySeq(1);
        assertTrue(member != null);
    }
}

但是这个测试类在运行 junit 测试时在下面给了我这个错误。

java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for com.tource.cms.member.MemberService.getMemberById
    at org.apache.ibatis.session.Configuration$StrictMap.get(Configuration.java:672)
    at org.apache.ibatis.session.Configuration.getMappedStatement(Configuration.java:507)
    at org.apache.ibatis.session.Configuration.getMappedStatement(Configuration.java:500)
    at org.apache.ibatis.binding.MapperMethod.setupCommandType(MapperMethod.java:240)
    at org.apache.ibatis.binding.MapperMethod.<init>(MapperMethod.java:71)
    at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:39)
    at $Proxy18.getMemberById(Unknown Source)
    at com.tource.cms.member.MemberServiceImplTest.testGetMemberById(MemberServiceImplTest.java:39)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    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.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:74)
    at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:82)
    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:49)
    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.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
    at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31)
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
    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)

所以我改变了我的测试类，如下所示。

public class MemberServiceImplTest {

    MemberService memberService;

    public MemberServiceImplTest() {
        ApplicationContext ctx = new ClassPathXmlApplicationContext("spring-beans/spring-cms-root.xml");
        memberService = ctx.getBean("memberServiceImpl", MemberServiceImpl.class);
    }

    @Test
    public void testGetMemberById() {
        Member member = memberService.getMemberById("testid");
        assertTrue(member != null);
    }

    @Test
    public void testGetMemberBySeq() {
        Member member = memberService.getMemberBySeq(1);
        assertTrue(member != null);
    }
}

这很好用。有人知道它为什么有效吗？

我对两个班级之间的区别一无所知。

4

1 回答 1

3

您的 mybatis 映射/配置文件未加载，或者您的 bean 未正确自动连接。在损坏的示例中，尝试将 @Qualifier("memberServiceImpl") 添加到您的 memberService 声明中，就在 @Autowired 下方。

仅供参考，因为您说您是单元测试的新手，而不是 assertTrue(member != null)，您应该 assertNotNull(member)。如果您的断言失败，这将产生一个稍微好一点的错误消息。

于 2012-09-28T12:48:23.720 回答