Multi tool use

how to test that a method throws an exception junit5 [duplicate]

This question already has an answer here:

I have a DocumentTypeDetector class that has a detectForRequest() method.
I'm doing the corresponding tests, but I have not been able to verify that a customized exception is thrown, I'm using JUNIT 5.

DocumentTypeDetector

detectForRequest()

I have reviewed here, but the answers have not helped me, this is the code I have written following an example:

@Test
public void tryThrowExceptionForInvalidRequest() throws Exception{

InvalidInputRequestType exceptionThrown = Assertions.assertThrows(
InvalidInputRequestType.class,
() -> {
throw new InvalidInputRequestType("La petición debe estar en un formato valido JSON o XML");
}
);
assertEquals("La petición debe estar en un formato valido JSON o XML", exceptionThrown.getMessage());
}


But this does not tell me anything about my test

I need to verify that my method returns the corresponding exception, something like this:

@Test
public void tryThrowExceptionForInvalidRequest() throws Exception{
String invalid = "Este es un request invalido";
assertIsThrown(InvalidInputRequestType.class, detector.detectForRequest(invalid));
}


How can I test this?

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1 Answer
1

Maybe you can try the following code:

@Test
public void tryThrowExceptionForInvalidRequest() throws Exception {

final String invalid = "Este es un request invalido";

InvalidInputRequestType exceptionThrown = Assertions.assertThrows(
InvalidInputRequestType.class,
() -> {
detector.detectForRequest(invalid);
}
);
assertEquals(invalid, exceptionThrown.getMessage());
}