from django.contrib.gis.geos import LineString

from django.test import SimpleTestCase

class GEOSCoordSeqTest(SimpleTestCase):

    def test_getitem(self):

        coord_seq = LineString([(x, x) for x in range(2)]).coord_seq

        for i in (0, 1):

            with self.subTest(i):

                self.assertEqual(coord_seq[i], (i, i))

        for i in (-3, 10):

            msg = "invalid GEOS Geometry index: %s" % i

            with self.subTest(i):

                with self.assertRaisesMessage(IndexError, msg):

                    coord_seq[i]