Spring junit异常

Question

这是我的测试类。当我尝试运行测试方法时遇到以下异常。

我使用parmeterized测试各种inputs.Am使用maven.not使用ant构建。

Exception: 
java.lang.Exception: Test class should have exactly one public zero-argument constructor 
    at org.junit.runners.BlockJUnit4ClassRunner.validateZeroArgConstructor(BlockJUnit4ClassRunner.java:147) 
    at org.junit.runners.BlockJUnit4ClassRunner.validateConstructor(BlockJUnit4ClassRunner.java:124) 
    at org.junit.runners.BlockJUnit4ClassRunner.collectInitializationErrors(BlockJUnit4ClassRunner.java:103) 
    at org.junit.runners.ParentRunner.validate(ParentRunner.java:355) 
    at org.junit.runners.ParentRunner.<init>(ParentRunner.java:76) 
    at org.junit.runners.BlockJUnit4ClassRunner.<init>(BlockJUnit4ClassRunner.java:57) 
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.<init>(SpringJUnit4ClassRunner.java:104) 
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) 
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) 
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) 
    at java.lang.reflect.Constructor.newInstance(Constructor.java:526) 
    at org.junit.internal.builders.AnnotatedBuilder.buildRunner(AnnotatedBuilder.java:29) 
    at org.junit.internal.builders.AnnotatedBuilder.runnerForClass(AnnotatedBuilder.java:21) 
    at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59) 
    at org.junit.internal.builders.AllDefaultPossibilitiesBuilder.runnerForClass 

---

@RunWith(SpringJUnit4ClassRunner.class) 
@ContextConfiguration(locations = { 
    "classpath:config/applicationContext-http-int.xml", 
    "classpath:config/web-application-config.xml" }) 

public class TestValidatePolicy extends BaseTest{ 

    @Autowired 
    private Service Service; 

    private String Number; 
    private String Code;  

     @Parameters 
    public static Collection primeNumbers() { 
     return Arrays.asList(new Object[][] { 
     { "8001060001045", "86502" }, 
     { "8001060001039", "85902" }, 

     }); 
    } 

    public TestValidatePolicy(String Number,String Code){ 

    this.Number = Number; 
    this.Code = Code;  
    }  

    @Test  
    public void testValidatePolicyDetails() throws Exception { 

    String xmlValue = getStringFromStream("validatePolicy.xml");   
    Assert.assertEquals(xmlValue, Service.getDetails(Number,Code)); 
    }  
} 

Answer 1

您的测试类有两个参数的构造函数：

public TestValidatePolicy(String Number,String Code){ 
    ... 
} 

错误消息称（正确）：

Test class should have exactly one public zero-argument constructor 

可以创建一个零参数构造函数明确：

public TestValidatePolicy() { 
    ... 
} 

......或者摆脱双参数的构造函数。

- 但你正在尝试运行参数化的jUnit4测试。这些都需要一个@RunWith指定参数亚军：

@RunWith(Parameterized.class) 

...但你已经更换了使用Spring亚军：

@RunWith(SpringJUnit4ClassRunner.class) 

你不能有两个@RunWith注释和（据我所知）没有ParameterizedSpringJUnit4ClassRunner。那么该怎么办？

我找到了一个建议here。

用途：

@RunWith(Parameterized.class) 

既然你不能使用Spring亚军，你需要手动设置相同的行为：

@RunWith(Parameterized.class) 
@ContextConfiguration(locations = {"classpath:applicationContext.xml"}) 
public class EmailTest { 

private TestContextManager testContextManager; 

@Before 
public void setUpContext() throws Exception { 
    //this is where the magic happens, we actually do "by hand" what the spring runner would do for us, 
    // read the JavaDoc for the class bellow to know exactly what it does, the method names are quite accurate though 
    this.testContextManager = new TestContextManager(getClass()); 
    this.testContextManager.prepareTestInstance(this); 
} 

@Parameters 
public static Collection<object []> data() { 
    ... 
}