def test_esri(self):
srs = SpatialReference('NAD83')
pre_esri_wkt = srs.wkt
srs.to_esri()
self.assertNotEqual(srs.wkt, pre_esri_wkt)
self.assertIn('DATUM["D_North_American_1983"', srs.wkt)
srs.from_esri()
self.assertIn('DATUM["North_American_Datum_1983"', srs.wkt)
