@Test
    public void shouldDetermineElementsAreNotEqualAsAIsVertexAndBIsEdge() {
        final Element mockVertex = mock(Vertex.class);
        final Element mockEdge = mock(Edge.class);
        assertFalse(ElementHelper.areEqual(mockVertex, mockEdge));
    }
@author Stephen Mallette (http://stephen.genoprime.com)
gremlin-core/src/test/java/org/apache/tinkerpop/gremlin/structure/util/ElementHelperTest.java