assertEquals(depender1, downstreamProjects.get(0));
        assertEquals(depender3, downstreamProjects.get(1));
        assertEquals(depender2, downstreamProjects.get(2));
    }

    @Test
    void testGetUpstreamProjects() throws CycleDetectedException, DuplicateProjectException {
        ProjectDependencyGraph graph = threeProjectsDependingOnASingle();