73 

    74     def test01b_hexewkb(self):

    75         "Testing (HEX)EWKB output."

    76         from binascii import a2b_hex

    77 

    78         pnt_2d = Point(0, 1, srid=4326)

    79         pnt_3d = Point(0, 1, 2, srid=4326)

    80         

    81         # OGC-compliant HEX will not have SRID nor Z value.

    82         self.assertEqual(ogc_hex, pnt_2d.hex)

    83         self.assertEqual(ogc_hex, pnt_3d.hex)

    84 

    85         # HEXEWKB should be appropriate for its dimension -- have to use an

    86         # a WKBWriter w/dimension set accordingly, else GEOS will insert

    87         # garbage into 3D coordinate if there is none.  Also, GEOS has a

    88         # a bug in versions prior to 3.1 that puts the X coordinate in

    89         # place of Z; an exception should be raised on those versions.

    90         self.assertEqual(hexewkb_2d, pnt_2d.hexewkb)

    91         if GEOS_PREPARE:

    92             self.assertEqual(hexewkb_3d, pnt_3d.hexewkb)

    93             self.assertEqual(True, GEOSGeometry(hexewkb_3d).hasz)

    94         else:

    95             try:

    96                 hexewkb = pnt_3d.hexewkb

    97             except GEOSException:

    98                 pass

    99             else:

   100                 self.fail('Should have raised GEOSException.')

   101 

   102         # Same for EWKB.

   103         self.assertEqual(buffer(a2b_hex(hexewkb_2d)), pnt_2d.ewkb)

   104         if GEOS_PREPARE:

   105             self.assertEqual(buffer(a2b_hex(hexewkb_3d)), pnt_3d.ewkb)

   106         else:

   107             try:

   108                 ewkb = pnt_3d.ewkb

   109             except GEOSException:

   110                 pass

   111             else:

   112                 self.fail('Should have raised GEOSException')

   113         

   114         # Redundant sanity check.

   115         self.assertEqual(4326, GEOSGeometry(hexewkb_2d).srid)