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();

    String version;
    String classifier;
    String type;
    String scope;

    transient Object datum;

    public String getGroupId() {
        return groupId;
    }

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

    public String getArtifactId() {
        return artifactId;
    }

    public void setArtifactId(String artifactId) {

        return "repository metadata for: '" + getKey() + "'";
    }

    protected static Metadata createMetadata(Artifact artifact, Versioning versioning) {
        Metadata metadata = new Metadata();
        metadata.setGroupId(artifact.getGroupId());
        metadata.setArtifactId(artifact.getArtifactId());
        metadata.setVersion(artifact.getVersion());
        metadata.setVersioning(versioning);
        return metadata;
    }

    void setScope(String scope);

    VersionRange getVersionRange();

    void setVersionRange(VersionRange newRange);

    void selectVersion(String version);

    void setGroupId(String groupId);

    void setArtifactId(String artifactId);

    boolean isSnapshot();

    void setResolved(boolean resolved);

    boolean isResolved();

    }

    public String toDomainString() {
        return groupId + ":" + artifactId;
    }

    public String getGroupId() {
        return groupId;
    }

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

    public String getArtifactId() {
        return artifactId;
    }

    public void setArtifactId(String name) {