}
    }

    @Override
    public void selectVersion(String version) {
        this.version = version;
        setBaseVersionInternal(version);
    }

    @Override
    public void setGroupId(String groupId) {
        this.groupId = groupId;
    }

    @Override
    public void setArtifactId(String artifactId) {
        this.artifactId = artifactId;
    }

    @Override

        super();
    }

    @Test
    public void testResolveParentThrowsUnresolvableModelExceptionWhenNotFound() throws Exception {
        final Parent parent = new Parent();
        parent.setGroupId("ut.simple");
        parent.setArtifactId("artifact");
        parent.setVersion("0");

        UnresolvableModelException e = assertThrows(
                UnresolvableModelException.class,

                // GroupId
                String orgGroupId = model.getGroupId();
                String intGroupId = interpolate(orgGroupId);
                if (orgGroupId != intGroupId) {
                    model.setGroupId(intGroupId);
                }
                // ArtifactId
                String orgArtifactId = model.getArtifactId();
                String intArtifactId = interpolate(orgArtifactId);

        request.setPom(project.getModel());

        try {
            PluginPrefixResult result = pluginPrefixResolver.resolve(request);

            Plugin plugin = new Plugin();
            plugin.setGroupId(result.getGroupId());
            plugin.setArtifactId(result.getArtifactId());

            return plugin;
        } catch (NoPluginFoundForPrefixException e) {
            return null;
        }
    }

                        + cause.getMessage(),
                cause);
        // Convert to old type
        CoreExtension oldExtension = new CoreExtension();
        oldExtension.setGroupId(extension.getGroupId());
        oldExtension.setArtifactId(extension.getArtifactId());
        oldExtension.setVersion(extension.getVersion());
        if (extension.getClassLoadingStrategy() != null) {

        // merge implicitly assumes that merge is only called on the same GAV and does not perform any validation here!
        Metadata source = new Metadata();
        source.setArtifactId("source-artifact");
        source.setGroupId("source-group");
        source.setVersion("2.0");
        assertFalse(target.merge(source));
        assertEquals("myArtifact", target.getArtifactId());
        assertEquals("myGroup", target.getGroupId());

            //
            // groupId
            // artifactId
            // version
            // goal
            //
            plugin = new Plugin();
            plugin.setGroupId(tok[0]);
            plugin.setArtifactId(tok[1]);
            plugin.setVersion(tok[2]);
            goal.append(tok[3]);

        assertEquals(groupId + ":" + artifactId + ":" + type + ":" + classifier, artifact.getDependencyConflictId());
    }

    @Test
    void testGetDependencyConflictIdNullGroupId() {
        artifact.setGroupId(null);
        assertEquals(null + ":" + artifactId + ":" + type + ":" + classifier, artifact.getDependencyConflictId());
    }

    @Test
    void testGetDependencyConflictIdNullClassifier() {

                && ARTIFACT_ID.equals(artifact.getArtifactId())
                && VERSION.equals(artifact.getVersion())) {
            Model m = new Model();
            m.setArtifactId(ARTIFACT_ID);
            m.setGroupId(GROUP_ID);
            m.setVersion(VERSION);
            Repository repository = new Repository();
            repository.setId(REPO_ID);
            repository.setUrl(REPO_URL);

            plugins = Collections.emptySet();
        }

        return plugins;
    }

    private Plugin newPlugin(String artifactId, String... goals) {
        Plugin plugin = new Plugin();

        plugin.setGroupId("org.apache.maven.plugins");
        plugin.setArtifactId(artifactId);

        for (String goal : goals) {
            PluginExecution pluginExecution = new PluginExecution();