assertEquals(aProject, sortedProjects.get(0));
        assertEquals(cProject, sortedProjects.get(1));

        assertTrue(graph.getDownstreamProjects(aProject, false).contains(cProject));
    }

    // Test verifying that getDownstreamProjects does not contain duplicates.
    // This is a regression test for https://github.com/apache/maven/issues/2487.
    //
    // The graph is:
    // aProject -> bProject

                if (makeUpstream) {
                    projectsSet.addAll(graph.getUpstreamProjects(project, true));
                }
                if (makeDownstream) {
                    projectsSet.addAll(graph.getDownstreamProjects(project, true));
                }
            }

            result = new ArrayList<>(projectsSet);

            // Order the new list in the original order

            public List<MavenProject> getSortedProjects() {
                return Collections.singletonList(session.getCurrentProject());
            }

            @Override
            public List<MavenProject> getDownstreamProjects(MavenProject project, boolean transitive) {
                return Collections.emptyList();
            }
        });

        final List<String> log = new ArrayList<>();