@Test
public void testGetEdge() {

    DependencyDTO edge = graphController.getEdge("v4", "v5");
    assertThat(edge, notNullValue());
    assertThat(edge.getSourceName(), is("v4"));
    assertThat(edge.getTargetName(), is("v5"));
    assertThat(edge.getTypeName(), is("READ_WRITE"));
}