CloneAGraphTest.java

import org.junit.Test;

import java.util.Arrays;
import java.util.List;

import static org.junit.Assert.*;

public class CloneAGraphTest {

    private GraphVertex expected;
    private GraphVertex G;

    @Test
    public void cloneGraph1() throws Exception {
        GraphVertex a = new GraphVertex(0);
        GraphVertex b = new GraphVertex(1);
        GraphVertex c = new GraphVertex(2);
        GraphVertex d = new GraphVertex(3);
        a.edges.add(b);
        a.edges.add(c);
        b.edges.add(c);
        b.edges.add(d);

        expected = a;
        G = a;

        test(expected, G);
    }

    private void test(GraphVertex expected, GraphVertex G) {
        assertEquals(expected, CloneAGraph.cloneGraph(G));
    }

}