void testToSnapshotVersion() {
        assertEquals("1.2.3", ArtifactUtils.toSnapshotVersion("1.2.3"));
        assertEquals("1.2.3-SNAPSHOT", ArtifactUtils.toSnapshotVersion("1.2.3-SNAPSHOT"));
        assertEquals("1.2.3-SNAPSHOT", ArtifactUtils.toSnapshotVersion("1.2.3-20090413.094722-2"));
        assertEquals("1.2.3-20090413X094722-2", ArtifactUtils.toSnapshotVersion("1.2.3-20090413X094722-2"));
    }

    /**

    public void setBaseVersion(String baseVersion) {
        setBaseVersionInternal(baseVersion);
    }

    protected void setBaseVersionInternal(String baseVersion) {
        this.baseVersion = ArtifactUtils.toSnapshotVersion(baseVersion);
    }

    @Override
    public int compareTo(Artifact a) {
        int result = groupId.compareTo(a.getGroupId());
        if (result == 0) {

                return true;
            } else {
                return Artifact.VERSION_FILE_PATTERN.matcher(version).matches();
            }
        }
        return false;
    }

    public static String toSnapshotVersion(String version) {
        notBlank(version, "version can neither be null, empty nor blank");

        int lastHyphen = version.lastIndexOf('-');
        if (lastHyphen > 0) {

    }

    private static String getKey(Plugin plugin, boolean extension) {
        String version = ArtifactUtils.toSnapshotVersion(plugin.getVersion());
        return (extension ? "extension>" : "plugin>") + plugin.getGroupId() + ":" + plugin.getArtifactId() + ":"
                + version;
    }