@Test
public void storeParentChildDescendantProjectsAndRetrieveAncestry() throws Exception {
final ProjectVersionRef r = new SimpleProjectVersionRef("org.test", "root", "1");
final ProjectVersionRef p = new SimpleProjectVersionRef("org.test", "parent", "1.0");
final ProjectVersionRef c = new SimpleProjectVersionRef("org.test", "child", "1.0");
final EProjectDirectRelationships root =
new EProjectDirectRelationships.Builder(sourceUri, r).build();
final EProjectDirectRelationships parent =
new EProjectDirectRelationships.Builder(sourceUri, p).withParent(r).build();
final EProjectDirectRelationships child =
new EProjectDirectRelationships.Builder(sourceUri, c).withParent(p).build();
graph.storeRelationships(root.getExactAllRelationships());
graph.storeRelationships(parent.getExactAllRelationships());
graph.storeRelationships(child.getExactAllRelationships());
final List<ProjectVersionRef> ancestry = CartoGraphUtils.getAncestry(c, graph);
assertThat(ancestry, notNullValue());
assertThat(ancestry.size(), equalTo(3));
final Iterator<ProjectVersionRef> iterator = ancestry.iterator();
assertThat(iterator.next(), equalTo(c));
assertThat(iterator.next(), equalTo(p));
assertThat(iterator.next(), equalTo(r));
}
