JUNIT AssertThatThrownBy Capture Return Value

Asked Mar 14 '17 at 16:43

Active Mar 15 '17 at 23:38

Viewed 1,316 times

I try to test exception thrown by a method like this:

Assertions.assertThatThrownBy( () ->  myMethod(paramA, paramB))
      .isInstanceOf(IllegalArgumentException.class).hasMessage(error);

However the problem is I still need to make more assertions on the return value of myMethod() without having to invoke it again separately. Since it is a lambda, I cannot assign the return value to external variable without a compile error.

How do I capture and make assertions on the return value of myMethod() without having to make another call?

edited Mar 15 '17 at 23:38

Stefan Birkner

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asked Mar 14 '17 at 16:43

Ace

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how can the method throw an exception AND return a value? One or the other, but not both – Sean Patrick Floyd Mar 14 '17 at 16:49
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@SeanPatrickFloyd Lolz. I must be have been smoking something this morning! :) Thanks for pointing it out. – Ace Mar 14 '17 at 16:50

JUNIT AssertThatThrownBy Capture Return Value

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