Last Updated: February 25, 2016

Expecting an exception JUnit

When expecting exceptions in the code instead of

@Test(expected=Exception.class)
public void doFooTest(){...}

do something like this

public class FooTest {
 @Rule
 public ExpectedException exception = ExpectedException.none();

 @Test
 public void doFooTest() {
 Bar bar = new Bar();

 exception.expect(IndexOutOfBoundsException.class);
 bar.doStuff();
 }
}

because the test will fail if the exception is not thrown in the second case , but in the first even if the exception is not thrown it will succeed