test (expressions) - add more tests (ref #3616)
test (expressions) - add more tests (ref #3616)

mapnik/mapnik,lightmare/mapnik,tomhughes/mapnik,naturalatlas/mapnik,tomhughes/mapnik,lightmare/mapnik,tomhughes/mapnik,naturalatlas/mapnik,mapnik/mapnik,naturalatlas/mapnik,lightmare/mapnik,mapnik/mapnik,tomhughes/mapnik,naturalatlas/mapnik,mapnik/mapnik,lightmare/mapnik