Graph graph = new Graph();
        graph.addVertex("a");
        assertEquals(1, graph.getVertices().size());
        assertEquals("a", graph.getVertex("a").getLabel());
        graph.addVertex("a");
        assertEquals(1, graph.getVertices().size());
        assertEquals("a", graph.getVertex("a").getLabel());

        graph.addVertex("b");
        assertEquals(2, graph.getVertices().size());
        assertFalse(hasEdge(graph, "a", "b"));

        model.setArtifactId("real-artifact");

        MavenProject project = new MavenProject(model);

        assertEquals("test-group", project.getGroupId(), "groupId proto-inheritance failed.");
        assertEquals("real-artifact", project.getArtifactId(), "artifactId is masked.");
        assertEquals("1000", project.getVersion(), "version proto-inheritance failed.");

        // draw the NPE.
        project.getId();
    }

        assertEquals("Codehaus", p4.getOrganization().getName());

        // ----------------------------------------------------------------------
        // Value taken from super model
        // ----------------------------------------------------------------------

        assertEquals("4.0.0", p4.getModelVersion());

        assertEquals("4.0.0", p4.getModelVersion());
    }

    void testGetVersionReturnsResolvedVersionOnSnapshot() {
        assertEquals(snapshotResolvedVersion, snapshotArtifact.getVersion());

        // this is FOUL!
        //        snapshotArtifact.isSnapshot();

        assertEquals(snapshotSpecVersion, snapshotArtifact.getBaseVersion());
    }

    @Test
    void testGetDependencyConflictId() {

        assertEquals(0, problems.size());

        Repository repo = org.apache.maven.api.settings.Repository.newInstance(false);
        Settings model2 = Settings.newBuilder()
                .profiles(List.of(prof.withRepositories(List.of(repo))))
                .build();
        problems.clear();
        problems = validator.validate(model2);
        assertEquals(2, problems.size());

        StringSource source = new StringSource("Hello World!");
        assertEquals("(memory)", source.getLocation());

        source = new StringSource("Hello World!", "LOCATION");
        assertEquals("LOCATION", source.getLocation());
    }

    @Test
    void testGetContent() {
        StringSource source = new StringSource(null);
        assertEquals("", source.getContent());

            }
        }

        assertNotNull(plugin);

        assertEquals("1.0", plugin.getVersion());

        XmlNode configuration = plugin.getDelegate().getConfiguration();

        assertEquals(
                "src/conf/plexus.conf",
                configuration.getChild("plexusConfiguration").getValue());

        assertEquals(
                "src/conf/plexus.properties",

        profileManager.addProfile(defaultActivated);

        List active = profileManager.getActiveProfiles();

        assertNotNull(active);
        assertEquals(1, active.size());
        assertEquals("defaultActivated", ((Profile) active.get(0)).getId());
    }

    @Test
    void testShouldNotActivateDefaultProfile() throws Exception {
        Profile syspropActivated = new Profile();

                "Child SCM developer connection is: " + project1.getScm().getDeveloperConnection());

        assertEquals(project1.getScm().getUrl(), project0.getScm().getUrl() + "/modules/p1");
        assertEquals(project1.getScm().getConnection(), project0.getScm().getConnection() + "/modules/p1");
        assertEquals(
                project1.getScm().getDeveloperConnection(), project0.getScm().getDeveloperConnection() + "/modules/p1");
    }

        assertEquals("p0-org", p0.getOrganization().getName());

        // ----------------------------------------------------------------------
        // Check p1 value for org name
        // ----------------------------------------------------------------------

        MavenProject p1 = getProject(projectFile("maven.t01", "p1"));

        assertEquals("p1-org", p1.getOrganization().getName());