MockBean stubbing ineffective
I have a configuration class with a few MockBeans replacing actual beans in context for tests.
@Configuration
public class MyTestConfig {
@MockBean
private MyService myService;
}
I use those mocks in my tests:
@Import({ MyTestConfig .class })
public class MyTest {
@Autowired
private MyService myService;
@Test
public void aTest() {
...
}
}
First the idea was to add the stubbing in this MyTestConfig configuration class, so that the mock is pre-made for all tests, so I did it in a @PostConstruct method, and it worked just fine - the mock in test did return the expected value:
@PostConstruct
public void init() {
when(myService.foo("say hello")).thenReturn("Hello world");
}
It turned out though, that constructing a pre-made mock suitable for all test can be tricky, so we decided to move the stubbing to tests.
@Test
public void aTest() {
when(myService.foo("say hello")).thenReturn("Hello world");
}
And this doesn't work - the stubbed method returns null. We want to leave MockBeans in the configuration class, but stub them in tests, so any advice on why the stubbing is ineffective?
Spring Boot 2.0.5, Mockito 2.22.0
spring spring-boot testing mocking mockito
asked Nov 23 '18 at 7:36
snwsnw
1,190713
add a comment |
I have a configuration class with a few MockBeans replacing actual beans in context for tests.
@Configuration
public class MyTestConfig {
@MockBean
private MyService myService;
}
I use those mocks in my tests:
@Import({ MyTestConfig .class })
public class MyTest {
@Autowired
private MyService myService;
@Test
public void aTest() {
...
}
}
First the idea was to add the stubbing in this MyTestConfig configuration class, so that the mock is pre-made for all tests, so I did it in a @PostConstruct method, and it worked just fine - the mock in test did return the expected value:
@PostConstruct
public void init() {
when(myService.foo("say hello")).thenReturn("Hello world");
}
It turned out though, that constructing a pre-made mock suitable for all test can be tricky, so we decided to move the stubbing to tests.
@Test
public void aTest() {
when(myService.foo("say hello")).thenReturn("Hello world");
}
And this doesn't work - the stubbed method returns null. We want to leave MockBeans in the configuration class, but stub them in tests, so any advice on why the stubbing is ineffective?
Spring Boot 2.0.5, Mockito 2.22.0
spring spring-boot testing mocking mockito
asked Nov 23 '18 at 7:36
snwsnw
1,190713
1
I'm actually surprised that@MockBeanworks in a configuration class as it shouldn't. Also the use of@Importon your test class is something you shouldn't be doing. If you want to globally mock beans you will need to create the mock yourself usingMockito.mockinside an@Beanmethod to have reliable mocking. Else use an@Autowiredfield in your testcase which you want to use the mocked instance. Also instead of@Importyou should specify this in your@SpringBootTestor@ContextConfigurationas class to use for configuration.
– M. Deinum
Nov 23 '18 at 8:08
@M.Deinum The documentation of@MockBeanstates: Can be used as a class level annotation or on fields in either @Configuration classes, or test classes that are @RunWith the SpringRunner, so it's definitely supposed to work in configuration class. Defining a plain mock in @Bean method would be fine if the stubbing in test worked, but it doesn't, so that's not an option either.
– snw
Nov 23 '18 at 8:38
1
If stubbing doesn't work you must be doing weird things. We use this literally in hundreds of testcases and works like a charm. Are you defining the correct stubbing for the actions you want to perform?
– M. Deinum
Nov 23 '18 at 8:40
@M.Deinum Turns our my problem description is insufficient, because I skipped quite an important detail, but you did help me figure it out anyway. What I didn't say (aiming to keep it simple) is that my test is an@WebMvcTestwith@WithUserDetails, and my service is a dependency of a customUserDetailsManager. Spring Security makes the call toUserDetailsManagerbefore the actual test content. That's why the stubbing in test had no effect, and that's why it worked fine when the mock was stubbed in config's@PostConstruct. Thanks for your help.
– snw
Nov 23 '18 at 9:05
add a comment |
I have a configuration class with a few MockBeans replacing actual beans in context for tests.
@Configuration
public class MyTestConfig {
@MockBean
private MyService myService;
}
I use those mocks in my tests:
@Import({ MyTestConfig .class })
public class MyTest {
@Autowired
private MyService myService;
@Test
public void aTest() {
...
}
}
First the idea was to add the stubbing in this MyTestConfig configuration class, so that the mock is pre-made for all tests, so I did it in a @PostConstruct method, and it worked just fine - the mock in test did return the expected value:
@PostConstruct
public void init() {
when(myService.foo("say hello")).thenReturn("Hello world");
}
It turned out though, that constructing a pre-made mock suitable for all test can be tricky, so we decided to move the stubbing to tests.
@Test
public void aTest() {
when(myService.foo("say hello")).thenReturn("Hello world");
}
And this doesn't work - the stubbed method returns null. We want to leave MockBeans in the configuration class, but stub them in tests, so any advice on why the stubbing is ineffective?
Spring Boot 2.0.5, Mockito 2.22.0
spring spring-boot testing mocking mockito
asked Nov 23 '18 at 7:36
snwsnw
1,190713
I have a configuration class with a few MockBeans replacing actual beans in context for tests.
@Configuration
public class MyTestConfig {
@MockBean
private MyService myService;
}
I use those mocks in my tests:
@Import({ MyTestConfig .class })
public class MyTest {
@Autowired
private MyService myService;
@Test
public void aTest() {
...
}
}
First the idea was to add the stubbing in this MyTestConfig configuration class, so that the mock is pre-made for all tests, so I did it in a @PostConstruct method, and it worked just fine - the mock in test did return the expected value:
@PostConstruct
public void init() {
when(myService.foo("say hello")).thenReturn("Hello world");
}
It turned out though, that constructing a pre-made mock suitable for all test can be tricky, so we decided to move the stubbing to tests.
@Test
public void aTest() {
when(myService.foo("say hello")).thenReturn("Hello world");
}
And this doesn't work - the stubbed method returns null. We want to leave MockBeans in the configuration class, but stub them in tests, so any advice on why the stubbing is ineffective?
Spring Boot 2.0.5, Mockito 2.22.0
spring spring-boot testing mocking mockito
spring spring-boot testing mocking mockito
asked Nov 23 '18 at 7:36
snwsnw
1,190713
asked Nov 23 '18 at 7:36
snwsnw
1,190713
asked Nov 23 '18 at 7:36
snwsnw
1,190713
asked Nov 23 '18 at 7:36
snwsnw
1,190713
asked Nov 23 '18 at 7:36
snwsnw
1,190713
1,190713
1
I'm actually surprised that@MockBeanworks in a configuration class as it shouldn't. Also the use of@Importon your test class is something you shouldn't be doing. If you want to globally mock beans you will need to create the mock yourself usingMockito.mockinside an@Beanmethod to have reliable mocking. Else use an@Autowiredfield in your testcase which you want to use the mocked instance. Also instead of@Importyou should specify this in your@SpringBootTestor@ContextConfigurationas class to use for configuration.
– M. Deinum
Nov 23 '18 at 8:08
@M.Deinum The documentation of@MockBeanstates: Can be used as a class level annotation or on fields in either @Configuration classes, or test classes that are @RunWith the SpringRunner, so it's definitely supposed to work in configuration class. Defining a plain mock in @Bean method would be fine if the stubbing in test worked, but it doesn't, so that's not an option either.
– snw
Nov 23 '18 at 8:38
1
If stubbing doesn't work you must be doing weird things. We use this literally in hundreds of testcases and works like a charm. Are you defining the correct stubbing for the actions you want to perform?
– M. Deinum
Nov 23 '18 at 8:40
@M.Deinum Turns our my problem description is insufficient, because I skipped quite an important detail, but you did help me figure it out anyway. What I didn't say (aiming to keep it simple) is that my test is an@WebMvcTestwith@WithUserDetails, and my service is a dependency of a customUserDetailsManager. Spring Security makes the call toUserDetailsManagerbefore the actual test content. That's why the stubbing in test had no effect, and that's why it worked fine when the mock was stubbed in config's@PostConstruct. Thanks for your help.
– snw
Nov 23 '18 at 9:05
add a comment |
1
I'm actually surprised that@MockBeanworks in a configuration class as it shouldn't. Also the use of@Importon your test class is something you shouldn't be doing. If you want to globally mock beans you will need to create the mock yourself usingMockito.mockinside an@Beanmethod to have reliable mocking. Else use an@Autowiredfield in your testcase which you want to use the mocked instance. Also instead of@Importyou should specify this in your@SpringBootTestor@ContextConfigurationas class to use for configuration.
– M. Deinum
Nov 23 '18 at 8:08
@M.Deinum The documentation of@MockBeanstates: Can be used as a class level annotation or on fields in either @Configuration classes, or test classes that are @RunWith the SpringRunner, so it's definitely supposed to work in configuration class. Defining a plain mock in @Bean method would be fine if the stubbing in test worked, but it doesn't, so that's not an option either.
– snw
Nov 23 '18 at 8:38
1
If stubbing doesn't work you must be doing weird things. We use this literally in hundreds of testcases and works like a charm. Are you defining the correct stubbing for the actions you want to perform?
– M. Deinum
Nov 23 '18 at 8:40
@M.Deinum Turns our my problem description is insufficient, because I skipped quite an important detail, but you did help me figure it out anyway. What I didn't say (aiming to keep it simple) is that my test is an@WebMvcTestwith@WithUserDetails, and my service is a dependency of a customUserDetailsManager. Spring Security makes the call toUserDetailsManagerbefore the actual test content. That's why the stubbing in test had no effect, and that's why it worked fine when the mock was stubbed in config's@PostConstruct. Thanks for your help.
– snw
Nov 23 '18 at 9:05
1
1
I'm actually surprised that
@MockBean works in a configuration class as it shouldn't. Also the use of @Import on your test class is something you shouldn't be doing. If you want to globally mock beans you will need to create the mock yourself using Mockito.mock inside an @Bean method to have reliable mocking. Else use an @Autowired field in your testcase which you want to use the mocked instance. Also instead of @Import you should specify this in your @SpringBootTest or @ContextConfiguration as class to use for configuration.– M. Deinum
Nov 23 '18 at 8:08
I'm actually surprised that
@MockBean works in a configuration class as it shouldn't. Also the use of @Import on your test class is something you shouldn't be doing. If you want to globally mock beans you will need to create the mock yourself using Mockito.mock inside an @Bean method to have reliable mocking. Else use an @Autowired field in your testcase which you want to use the mocked instance. Also instead of @Import you should specify this in your @SpringBootTest or @ContextConfiguration as class to use for configuration.– M. Deinum
Nov 23 '18 at 8:08
@M.Deinum The documentation of
@MockBean states: Can be used as a class level annotation or on fields in either @Configuration classes, or test classes that are @RunWith the SpringRunner, so it's definitely supposed to work in configuration class. Defining a plain mock in @Bean method would be fine if the stubbing in test worked, but it doesn't, so that's not an option either.– snw
Nov 23 '18 at 8:38
@M.Deinum The documentation of
@MockBean states: Can be used as a class level annotation or on fields in either @Configuration classes, or test classes that are @RunWith the SpringRunner, so it's definitely supposed to work in configuration class. Defining a plain mock in @Bean method would be fine if the stubbing in test worked, but it doesn't, so that's not an option either.– snw
Nov 23 '18 at 8:38
1
1
If stubbing doesn't work you must be doing weird things. We use this literally in hundreds of testcases and works like a charm. Are you defining the correct stubbing for the actions you want to perform?
– M. Deinum
Nov 23 '18 at 8:40
If stubbing doesn't work you must be doing weird things. We use this literally in hundreds of testcases and works like a charm. Are you defining the correct stubbing for the actions you want to perform?
– M. Deinum
Nov 23 '18 at 8:40
@M.Deinum Turns our my problem description is insufficient, because I skipped quite an important detail, but you did help me figure it out anyway. What I didn't say (aiming to keep it simple) is that my test is an
@WebMvcTest with @WithUserDetails, and my service is a dependency of a custom UserDetailsManager. Spring Security makes the call to UserDetailsManager before the actual test content. That's why the stubbing in test had no effect, and that's why it worked fine when the mock was stubbed in config's @PostConstruct. Thanks for your help.– snw
Nov 23 '18 at 9:05
@M.Deinum Turns our my problem description is insufficient, because I skipped quite an important detail, but you did help me figure it out anyway. What I didn't say (aiming to keep it simple) is that my test is an
@WebMvcTest with @WithUserDetails, and my service is a dependency of a custom UserDetailsManager. Spring Security makes the call to UserDetailsManager before the actual test content. That's why the stubbing in test had no effect, and that's why it worked fine when the mock was stubbed in config's @PostConstruct. Thanks for your help.– snw
Nov 23 '18 at 9:05
add a comment |
1 Answer
1
active
oldest
votes
Yes, stubbing should be performed inside their respective test cases (unless you have a test class that shares the stubbing scenarios but it all comes down to preference).
However, for creating @MockBeans, you would need to use a @SpringBootTest in order to get the actual beans replaced with mocks. This could be done as simply as this example:
@RunWith(SpringRunner.class)
@SpringBootTest
public class MyTest {
@Autowired
private MyTestClass testClass;
@MockBean
private MyService service;
@Test
public void myTest() {
// testing....
}
}
answered Nov 23 '18 at 8:16
Urosh T.Urosh T.
66711116
The bean is actually replaced with a mock.MockUtil.isMock(myService)returnstruein test. The only issue is that the stubbing performed in test has no effect.
– snw
Nov 23 '18 at 8:41
1
Are you using@SpringBootTestand aSpringRunnerto run your tests?
– Urosh T.
Nov 23 '18 at 8:48
I figured it out, see my comments under the question. Thanks for help!
– snw
Nov 23 '18 at 9:06
add a comment |
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1 Answer
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1 Answer
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oldest
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votes
Yes, stubbing should be performed inside their respective test cases (unless you have a test class that shares the stubbing scenarios but it all comes down to preference).
However, for creating @MockBeans, you would need to use a @SpringBootTest in order to get the actual beans replaced with mocks. This could be done as simply as this example:
@RunWith(SpringRunner.class)
@SpringBootTest
public class MyTest {
@Autowired
private MyTestClass testClass;
@MockBean
private MyService service;
@Test
public void myTest() {
// testing....
}
}
answered Nov 23 '18 at 8:16
Urosh T.Urosh T.
66711116
The bean is actually replaced with a mock.MockUtil.isMock(myService)returnstruein test. The only issue is that the stubbing performed in test has no effect.
– snw
Nov 23 '18 at 8:41
1
Are you using@SpringBootTestand aSpringRunnerto run your tests?
– Urosh T.
Nov 23 '18 at 8:48
I figured it out, see my comments under the question. Thanks for help!
– snw
Nov 23 '18 at 9:06
add a comment |
Yes, stubbing should be performed inside their respective test cases (unless you have a test class that shares the stubbing scenarios but it all comes down to preference).
However, for creating @MockBeans, you would need to use a @SpringBootTest in order to get the actual beans replaced with mocks. This could be done as simply as this example:
@RunWith(SpringRunner.class)
@SpringBootTest
public class MyTest {
@Autowired
private MyTestClass testClass;
@MockBean
private MyService service;
@Test
public void myTest() {
// testing....
}
}
answered Nov 23 '18 at 8:16
Urosh T.Urosh T.
66711116
The bean is actually replaced with a mock.MockUtil.isMock(myService)returnstruein test. The only issue is that the stubbing performed in test has no effect.
– snw
Nov 23 '18 at 8:41
1
Are you using@SpringBootTestand aSpringRunnerto run your tests?
– Urosh T.
Nov 23 '18 at 8:48
I figured it out, see my comments under the question. Thanks for help!
– snw
Nov 23 '18 at 9:06
add a comment |
Yes, stubbing should be performed inside their respective test cases (unless you have a test class that shares the stubbing scenarios but it all comes down to preference).
However, for creating @MockBeans, you would need to use a @SpringBootTest in order to get the actual beans replaced with mocks. This could be done as simply as this example:
@RunWith(SpringRunner.class)
@SpringBootTest
public class MyTest {
@Autowired
private MyTestClass testClass;
@MockBean
private MyService service;
@Test
public void myTest() {
// testing....
}
}
answered Nov 23 '18 at 8:16
Urosh T.Urosh T.
66711116
Yes, stubbing should be performed inside their respective test cases (unless you have a test class that shares the stubbing scenarios but it all comes down to preference).
However, for creating @MockBeans, you would need to use a @SpringBootTest in order to get the actual beans replaced with mocks. This could be done as simply as this example:
@RunWith(SpringRunner.class)
@SpringBootTest
public class MyTest {
@Autowired
private MyTestClass testClass;
@MockBean
private MyService service;
@Test
public void myTest() {
// testing....
}
}
answered Nov 23 '18 at 8:16
Urosh T.Urosh T.
66711116
answered Nov 23 '18 at 8:16
Urosh T.Urosh T.
66711116
answered Nov 23 '18 at 8:16
Urosh T.Urosh T.
66711116
answered Nov 23 '18 at 8:16
Urosh T.Urosh T.
66711116
66711116
The bean is actually replaced with a mock.MockUtil.isMock(myService)returnstruein test. The only issue is that the stubbing performed in test has no effect.
– snw
Nov 23 '18 at 8:41
1
Are you using@SpringBootTestand aSpringRunnerto run your tests?
– Urosh T.
Nov 23 '18 at 8:48
I figured it out, see my comments under the question. Thanks for help!
– snw
Nov 23 '18 at 9:06
add a comment |
The bean is actually replaced with a mock.MockUtil.isMock(myService)returnstruein test. The only issue is that the stubbing performed in test has no effect.
– snw
Nov 23 '18 at 8:41
1
Are you using@SpringBootTestand aSpringRunnerto run your tests?
– Urosh T.
Nov 23 '18 at 8:48
I figured it out, see my comments under the question. Thanks for help!
– snw
Nov 23 '18 at 9:06
The bean is actually replaced with a mock.
MockUtil.isMock(myService) returns true in test. The only issue is that the stubbing performed in test has no effect.– snw
Nov 23 '18 at 8:41
The bean is actually replaced with a mock.
MockUtil.isMock(myService) returns true in test. The only issue is that the stubbing performed in test has no effect.– snw
Nov 23 '18 at 8:41
1
1
Are you using
@SpringBootTest and a SpringRunner to run your tests?– Urosh T.
Nov 23 '18 at 8:48
Are you using
@SpringBootTest and a SpringRunner to run your tests?– Urosh T.
Nov 23 '18 at 8:48
I figured it out, see my comments under the question. Thanks for help!
– snw
Nov 23 '18 at 9:06
I figured it out, see my comments under the question. Thanks for help!
– snw
Nov 23 '18 at 9:06
add a comment |
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1
I'm actually surprised that
@MockBeanworks in a configuration class as it shouldn't. Also the use of@Importon your test class is something you shouldn't be doing. If you want to globally mock beans you will need to create the mock yourself usingMockito.mockinside an@Beanmethod to have reliable mocking. Else use an@Autowiredfield in your testcase which you want to use the mocked instance. Also instead of@Importyou should specify this in your@SpringBootTestor@ContextConfigurationas class to use for configuration.– M. Deinum
Nov 23 '18 at 8:08
@M.Deinum The documentation of
@MockBeanstates: Can be used as a class level annotation or on fields in either @Configuration classes, or test classes that are @RunWith the SpringRunner, so it's definitely supposed to work in configuration class. Defining a plain mock in @Bean method would be fine if the stubbing in test worked, but it doesn't, so that's not an option either.– snw
Nov 23 '18 at 8:38
1
If stubbing doesn't work you must be doing weird things. We use this literally in hundreds of testcases and works like a charm. Are you defining the correct stubbing for the actions you want to perform?
– M. Deinum
Nov 23 '18 at 8:40
@M.Deinum Turns our my problem description is insufficient, because I skipped quite an important detail, but you did help me figure it out anyway. What I didn't say (aiming to keep it simple) is that my test is an
@WebMvcTestwith@WithUserDetails, and my service is a dependency of a customUserDetailsManager. Spring Security makes the call toUserDetailsManagerbefore the actual test content. That's why the stubbing in test had no effect, and that's why it worked fine when the mock was stubbed in config's@PostConstruct. Thanks for your help.– snw
Nov 23 '18 at 9:05