Hi So I'm new to Junit and Mockito, so please bare with some misconception/mistakes that Ive made. I have a springbott service that I wanted to test and I want to mock a method call that is being made in one of the methods that I am testing but It will not work for some reason. I used both when(xxx.method(anyArgs)).return(someData) as well as doReturn(someData).when(xxx).method(anyArgs); But I still get the same type of error: InvalidUseOfMatchersException. I mock the service layer but I can not figure out what causes the issue.
The Exact Stack Trace:
org.mockito.exceptions.misusing.InvalidUseOfMatchersException:
Misplaced or misused argument matcher detected here:
-> at service.EventServiceTestUnit.validatePostDataTest(EventServiceTestUnit.java:61)
You cannot use argument matchers outside of verification or stubbing.
Examples of correct usage of argument matchers:
when(mock.get(anyInt())).thenReturn(null);
doThrow(new RuntimeException()).when(mock).someVoidMethod(anyObject());
verify(mock).someMethod(contains("foo"))
This message may appear after an NullPointerException if the last matcher is returning an object
like any() but the stubbed method signature expect a primitive argument, in this case,
use primitive alternatives.
when(mock.get(any())); // bad use, will raise NPE
when(mock.get(anyInt())); // correct usage use
Also, this error might show up because you use argument matchers with methods that cannot be mocked.
Following methods *cannot* be stubbed/verified: final/private/equals()/hashCode().
Mocking methods declared on non-public parent classes is not supported.
at service.EventServiceTestUnit.validatePostDataTest(EventServiceTestUnit.java:61)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.mockito.internal.runners.DefaultInternalRunner$1.run(DefaultInternalRunner.java:79)
at org.mockito.internal.runners.DefaultInternalRunner.run(DefaultInternalRunner.java:85)
at org.mockito.internal.runners.StrictRunner.run(StrictRunner.java:39)
at org.mockito.junit.MockitoJUnitRunner.run(MockitoJUnitRunner.java:163)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
My Service Layer Code:
// imports here
@Service
@AllArgsConstructor
public class EventServiceImpl implements EventService {
private EventModelRepo eventModelRepo;
static final HttpTransport HTTP_TRANSPORT = new NetHttpTransport();
// methods that dont matter
public int createAPost(EventDetails eventDetails) {
//Some where here the isOwner(STRING) is called
}
public static void getRequest(String reqUrl) throws IOException {
GenericUrl url = new GenericUrl(reqUrl);
HttpRequest request = HTTP_TRANSPORT.createRequestFactory().buildGetRequest(url);
HttpResponse response = request.execute();
InputStream is = response.getContent();
int ch;
while ((ch = is.read()) != -1) {
System.out.print((char) ch);
}
response.disconnect();
}
public boolean isOwner(String Owner) {
try {
getRequest("http://localhost:9024/login/isAuth?Username=" + Owner);
} catch (HttpResponseException e) {
System.out.println("Error: " + e.getContent());
return false;
} catch (IOException e) {
System.out.println("Could Not Connect To Site/Make Said Request. \nAre You In Testing? \nIf So This Is Ok.");
}
return true;
}
}
And here is my Junit:
//imports
@RunWith(MockitoJUnitRunner.class)
public class EventServiceTestUnit {
@Mock
private EventModelRepo eventModelRepo;
@InjectMocks
private EventServiceImpl eventServiceImpl ;
@Test
public void validatePostDataTest() {
// mocking the HTTP Call in isOwner()
HttpTransport transport = new MockHttpTransport();
HttpRequest request = null;
try {
request = transport.createRequestFactory().buildGetRequest(HttpTesting.SIMPLE_GENERIC_URL);
} catch (IOException e) {
e.printStackTrace();
}
try {
HttpResponse response = request.execute();
} catch (IOException e) {
e.printStackTrace();
}
EventDetails eventDetails = new EventDetails("username1", "resturant", "idk", "location.", ".com",
"no", "no p", "spring", "fair", "tes");
//If Owner Isn't Validate As Owner/Signed In
when(eventServiceImpl.isOwner(anyString())).thenReturn(false);
//doReturn(false).when(eventServiceImpl).isOwner(anyString());
eventDetails = new EventDetails("username", "resturant", "idk", "location.", ".com",
"no", "no p", "fall", "fair", "tes");
result = eventServiceImpl.validatePostData(eventDetails);
assertEquals(10, result);
}
}
