JMockit - initialization problem

Question

When I use the following test I get a WARNING:

WARNING: JMockit was initialized on demand, which may cause certain tests to fail; please check the documentation for better ways to get it initialized.

This is my test implemenation:

package test;

import static mockit.Mockit.*;
import junit.framework.TestCase;
import mockit.*;
import mockit.integration.junit4.*;


import org.junit.*;
import org.junit.runner.*;

import filip.ClassUnderTest;
import filip.LowerClass;

@RunWith(JMockit.class)
public class MockTest extends TestCase {

    @MockClass(realClass = LowerClass.class)
    public static class LowerClassMock {
        @Mock(invocations = 1)
        public String doWork() {
            return "Mockowanie dziala :D";
        }
    }

    @Before
    public void setUp() { setUpMocks(LowerClassMock.class); }

    @After
    public void tearDown() { tearDownMocks(); }

    @Test
    public void testJMockit() {
        ClassUnderTest classUnderTest = new ClassUnderTest();

        classUnderTest.print();
    }

}

Any ideas?

Answer 1

As I understand it, this exception is thrown when one attempts to call a JMockit method, while JMockit has not been properly initialized.

Make sure you follow the JMockit installation instructions, especially points 3 and 4. If the JMockit jar comes after the JUnit jar in the classpath, it might cause problems.