JUnit 4 compare Sets

Question

How would you succinctly assert the equality of Collection elements, specifically a Set in JUnit 4?

Answer 1

You can assert that the two Sets are equal to one another, which invokes the Set equals() method.

public class SimpleTest {

    private Set setA;
    private Set setB;

    @Before
    public void setUp() {
        setA = new HashSet();
        setA.add("Testing...");
        setB = new HashSet();
        setB.add("Testing...");
    }

    @Test
    public void testEqualSets() {
        assertEquals( setA, setB );
    }
}

This @Test will pass if the two Sets are the same size and contain the same elements.