Null pointer exception while accessing property from application properties in Junit test

Question

I have method which access property from application.properties & for which I am writing junit.

class ServiceClass{

@Value("${urlfromapplicationproperties}")
public String myUrl ;

public String getUrl(){
 return myUrl;
}
}

Below is test case:

@RunWith(SpringJunit4ClassRunner.class)
@PropertySource("classpath:test:properties")
public class ServiceClassTest {

@Mock 
ServiceClass serviceclass;

@Before
public void setup(){ MockitoAnnotations.initMocks(this);}

@Test
public myTestMethod(){

serviceclass.getUrl();
}
}

when I access the method its throwing null pointer. I have declared that property in application-test.yml too. what I am missing? any reference or answer to resolve this?

this would help https://stackoverflow.com/questions/23162777/how-do-i-mock-an-autowired-value-field-in-spring-with-mockito — Sri, Sep 20 '20 at 16:28

score 3 · Accepted Answer · answered Sep 20 '20 at 16:29

3

You can use ReflectionTestUtils setField

@Before
public void setup(){
    ReflectionTestUtils.setField(serviceclass, "myUrl", "http://testurl");
    MockitoAnnotations.initMocks(this);}
}

answered Sep 20 '20 at 16:29

Vikas

6,868
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score 0 · Answer 2 · answered Sep 20 '20 at 16:54

0

ServiceClass should be define as Spring bean

@Configuration    
public class ServiceClass {

answered Sep 20 '20 at 16:54

Beppe C

11,256
2
19
41

Null pointer exception while accessing property from application properties in Junit test

2 Answers2