@Test
public void clipGeometryContainedInViewport()
                        throws ParseException {

    final String wkt = "POLYGON ((0.0 0.0,0.3 0.0,0.3 0.3,0.0 0.3,0.0 0.2,0.2 0.2,0.0 0.0))";
    final Geometry geometryDistinct = new WKTReader( null ).read( wkt );
    final Geometry clippedGeometry = clipper.clipGeometry( geometryDistinct );
    assertTrue( clippedGeometry != null );
    assertTrue( geometryDistinct.equals( clippedGeometry ) );
}