Tests found in JTS/testxml/general and not ported as of rev 2455 (May 02 2009)
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TestDensify.xml
 - requires densify::Densifier still unported

TestPreparedPointPredicate.xml
 - requires using custom operation (PreparedGeometryOperation)

TestPreparedPolygonPredicate.xml
 - requires using custom operation (PreparedGeometryOperation)

TestPreparedPredicatesWithGeometryCollection.xml
 - requires using custom operation (PreparedGeometryOperation)

TestUnaryUnion.xml 
 -  requires geom::Geometry::Union() still unported 
