res.getIncidentEdges(v2).get(0).getVersion(),
                "wrong edge v1-v2 in the resulting graph after resolver");

        assertEquals(
                1, res.getIncidentEdges(v3).size(), "wrong # of edges v1-v3 in the resulting graph after resolver");
        assertEquals(
                "1.1",
                res.getIncidentEdges(v3).get(0).getVersion(),

        hash = hash * 31 + Objects.hashCode(plugin.getVersion());

        hash = hash * 31 + (plugin.isExtensions() ? 1 : 0);

        for (Dependency dependency : plugin.getDependencies()) {
            hash = hash * 31 + Objects.hashCode(dependency.getGroupId());
            hash = hash * 31 + Objects.hashCode(dependency.getArtifactId());
            hash = hash * 31 + Objects.hashCode(dependency.getVersion());

        assertNotNull(retrievedPlugin, "Plugin should be found");
        assertEquals("3.8.1", retrievedPlugin.getVersion(), "Initial version should match");

        // Modify the plugin version
        retrievedPlugin.setVersion("3.11.0");

        // Verify the change persists when getting the plugin again

        final Parent parent = new Parent();
        parent.setGroupId("ut.simple");
        parent.setArtifactId("artifact");
        parent.setVersion("1.0");

        assertNotNull(this.newModelResolver().resolveModel(parent));
        assertEquals("1.0", parent.getVersion());
    }

    @Test
    void testResolveParentSuccessfullyResolvesExistingParentUsingHighestVersion() throws Exception {

        return metadata.getGroupId();
    }

    @Override
    public String getArtifactId() {
        return metadata.getArtifactId();
    }

    @Override
    public String getVersion() {
        return metadata.getVersion();
    }

    @Override
    public Nature getNature() {
        return Nature.SNAPSHOT;
    }

        List<MavenProject> sortedProjects = session.getProjectDependencyGraph().getSortedProjects();
        for (MavenProject mavenProject : sortedProjects) {
            if (!topProject.getVersion().equals(mavenProject.getVersion())) {
                result = false;
                break;
            }
        }

        return result;
    }

    private void logReactorSummary(MavenSession session) {

        // We can do this by calling isChildOfRootNode on the current node.
        if ((artifact.getVersion() != null)
                && (!node.isChildOfRootNode() || node.getArtifact().getVersion() == null)) {
            fireEvent(ResolutionListener.MANAGE_ARTIFACT_VERSION, listeners, node, artifact);
            node.getArtifact().setVersion(artifact.getVersion());
        }

        if ((artifact.getScope() != null)

        assertEquals(createSet(artifacts), res.getArtifacts(), "Check artifact list");
        assertEquals("1.0", getArtifact("d", res.getArtifacts()).getVersion(), "Check version");
        assertEquals("2.0", getArtifact("b", res.getArtifacts()).getVersion(), "Check version");
    }

    @Test
    void testResolveNearestNewestIsNearest() throws ArtifactResolutionException, InvalidVersionSpecificationException {

        }

        if (!pluginArtifact.getBaseVersion().equals(pluginDescriptor.getVersion())) {
            errors.add("Plugin's descriptor contains the wrong version: " + pluginDescriptor.getVersion());
        }
    }

        if (empty(groupId)) {
            throw new InvalidArtifactRTException(
                    groupId, artifactId, getVersion(), type, "The groupId cannot be empty.");
        }

        if (empty(artifactId)) {
            throw new InvalidArtifactRTException(
                    groupId, artifactId, getVersion(), type, "The artifactId cannot be empty.");
        }

        if (empty(type)) {