ExpectedExceptions.java

package svv;


import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;
import org.junit.runner.RunWith;
import org.mockito.Mock;
import org.mockito.runners.MockitoJUnitRunner;

import static org.mockito.Mockito.verifyZeroInteractions;

@RunWith(MockitoJUnitRunner.class)
public class ExceptionTester {
    Thrower cut;
    @Mock
    Command c;

    @Rule
    public ExpectedException exception = ExpectedException.none();

    @Before
    public void setUp() {
        cut = new Thrower();
    }


    @Test
    public void shouldThrow() throws Exception {
        exception.expect(Exception.class);
        try {
            cut.now(true);
        } finally {
            verifyZeroInteractions(c);
        }

    }

    @Test
    public void shouldNotThrow() throws Exception {
        cut.now(false);
    }
}