def test_linearring_mutate(self):
coords = ((0.0, 0.0), (0.0, 1.0), (1.0, 1.0), (1.0, 0.0))
ring = LinearRing(coords)
# Coordinate modification
ring.coords = ((0.0, 0.0), (0.0, 2.0), (2.0, 2.0), (2.0, 0.0))
self.assertEqual(
ring.__geo_interface__,
{'type': 'LinearRing',
'coordinates': ((0.0, 0.0), (0.0, 2.0), (2.0, 2.0), (2.0, 0.0),
(0.0, 0.0))})
def test_polygon(self):
# Initialization
# Linear rings won't usually be created by users, but by polygons
coords = ((0.0, 0.0), (0.0, 1.0), (1.0, 1.0), (1.0, 0.0))
ring = LinearRing(coords)
self.assertEqual(len(ring.coords), 5)
self.assertEqual(ring.coords[0], ring.coords[4])
self.assertEqual(ring.coords[0], ring.coords[-1])
self.assertTrue(ring.is_ring)
# Coordinate modification
ring.coords = ((0.0, 0.0), (0.0, 2.0), (2.0, 2.0), (2.0, 0.0))
self.assertEqual(
ring.__geo_interface__, {
'type':
'LinearRing',
'coordinates':
((0.0, 0.0), (0.0, 2.0), (2.0, 2.0), (2.0, 0.0), (0.0, 0.0))
})
# Test ring adapter
coords = [[0.0, 0.0], [0.0, 1.0], [1.0, 1.0], [1.0, 0.0]]
ra = asLinearRing(coords)
self.assertTrue(ra.wkt.upper().startswith('LINEARRING'))
self.assertEqual(dump_coords(ra), [(0.0, 0.0), (0.0, 1.0), (1.0, 1.0),
(1.0, 0.0), (0.0, 0.0)])
coords[3] = [2.0, -1.0]
self.assertEqual(dump_coords(ra), [(0.0, 0.0), (0.0, 1.0), (1.0, 1.0),
(2.0, -1.0), (0.0, 0.0)])
# Construct a polygon, exterior ring only
polygon = Polygon(coords)
self.assertEqual(len(polygon.exterior.coords), 5)
# Ring Access
self.assertIsInstance(polygon.exterior, LinearRing)
ring = polygon.exterior
self.assertEqual(len(ring.coords), 5)
self.assertEqual(ring.coords[0], ring.coords[4])
self.assertEqual(ring.coords[0], (0., 0.))
self.assertTrue(ring.is_ring)
self.assertEqual(len(polygon.interiors), 0)
# Create a new polygon from WKB
data = polygon.wkb
polygon = None
ring = None
polygon = load_wkb(data)
ring = polygon.exterior
self.assertEqual(len(ring.coords), 5)
self.assertEqual(ring.coords[0], ring.coords[4])
self.assertEqual(ring.coords[0], (0., 0.))
self.assertTrue(ring.is_ring)
polygon = None
# Interior rings (holes)
polygon = Polygon(coords, [((0.25, 0.25), (0.25, 0.5), (0.5, 0.5),
(0.5, 0.25))])
self.assertEqual(len(polygon.exterior.coords), 5)
self.assertEqual(len(polygon.interiors[0].coords), 5)
with self.assertRaises(IndexError): # index out of range
polygon.interiors[1]
# Test from another Polygon
copy = Polygon(polygon)
self.assertEqual(len(polygon.exterior.coords), 5)
self.assertEqual(len(polygon.interiors[0].coords), 5)
with self.assertRaises(IndexError): # index out of range
polygon.interiors[1]
# Coordinate getters and setters raise exceptions
self.assertRaises(NotImplementedError, polygon._get_coords)
with self.assertRaises(NotImplementedError):
polygon.coords
# Geo interface
self.assertEqual(
polygon.__geo_interface__, {
'type':
'Polygon',
'coordinates':
(((0.0, 0.0), (0.0, 1.0), (1.0, 1.0), (2.0, -1.0), (0.0, 0.0)),
((0.25, 0.25), (0.25, 0.5), (0.5, 0.5), (0.5, 0.25),
(0.25, 0.25)))
})
# Adapter
hole_coords = [((0.25, 0.25), (0.25, 0.5), (0.5, 0.5), (0.5, 0.25))]
pa = asPolygon(coords, hole_coords)
self.assertEqual(len(pa.exterior.coords), 5)
self.assertEqual(len(pa.interiors), 1)
self.assertEqual(len(pa.interiors[0].coords), 5)
# Test Non-operability of Null rings
r_null = LinearRing()
self.assertEqual(r_null.wkt, 'GEOMETRYCOLLECTION EMPTY')
self.assertEqual(r_null.length, 0.0)
# Check that we can set coordinates of a null geometry
r_null.coords = [(0, 0), (1, 1), (1, 0)]
self.assertAlmostEqual(r_null.length, 3.414213562373095)
# Error handling
with self.assertRaises(ValueError):
# A LinearRing must have at least 3 coordinate tuples
Polygon([[1, 2], [2, 3]])
def test_polygon(self):
# Initialization
# Linear rings won't usually be created by users, but by polygons
coords = ((0.0, 0.0), (0.0, 1.0), (1.0, 1.0), (1.0, 0.0))
ring = LinearRing(coords)
self.assertEqual(len(ring.coords), 5)
self.assertEqual(ring.coords[0], ring.coords[4])
self.assertEqual(ring.coords[0], ring.coords[-1])
self.assertTrue(ring.is_ring)
# Coordinate modification
ring.coords = ((0.0, 0.0), (0.0, 2.0), (2.0, 2.0), (2.0, 0.0))
self.assertEqual(
ring.__geo_interface__,
{'type': 'LinearRing',
'coordinates': ((0.0, 0.0), (0.0, 2.0), (2.0, 2.0), (2.0, 0.0),
(0.0, 0.0))})
# Test ring adapter
coords = [[0.0, 0.0], [0.0, 1.0], [1.0, 1.0], [1.0, 0.0]]
ra = asLinearRing(coords)
self.assertTrue(ra.wkt.upper().startswith('LINEARRING'))
self.assertEqual(dump_coords(ra),
[(0.0, 0.0), (0.0, 1.0), (1.0, 1.0), (1.0, 0.0),
(0.0, 0.0)])
coords[3] = [2.0, -1.0]
self.assertEqual(dump_coords(ra),
[(0.0, 0.0), (0.0, 1.0), (1.0, 1.0), (2.0, -1.0),
(0.0, 0.0)])
# Construct a polygon, exterior ring only
polygon = Polygon(coords)
self.assertEqual(len(polygon.exterior.coords), 5)
# Ring Access
self.assertIsInstance(polygon.exterior, LinearRing)
ring = polygon.exterior
self.assertEqual(len(ring.coords), 5)
self.assertEqual(ring.coords[0], ring.coords[4])
self.assertEqual(ring.coords[0], (0., 0.))
self.assertTrue(ring.is_ring)
self.assertEqual(len(polygon.interiors), 0)
# Create a new polygon from WKB
data = polygon.wkb
polygon = None
ring = None
polygon = load_wkb(data)
ring = polygon.exterior
self.assertEqual(len(ring.coords), 5)
self.assertEqual(ring.coords[0], ring.coords[4])
self.assertEqual(ring.coords[0], (0., 0.))
self.assertTrue(ring.is_ring)
polygon = None
# Interior rings (holes)
polygon = Polygon(coords, [((0.25, 0.25), (0.25, 0.5),
(0.5, 0.5), (0.5, 0.25))])
self.assertEqual(len(polygon.exterior.coords), 5)
self.assertEqual(len(polygon.interiors[0].coords), 5)
with self.assertRaises(IndexError): # index out of range
polygon.interiors[1]
# Test from another Polygon
copy = Polygon(polygon)
self.assertEqual(len(polygon.exterior.coords), 5)
self.assertEqual(len(polygon.interiors[0].coords), 5)
with self.assertRaises(IndexError): # index out of range
polygon.interiors[1]
# Coordinate getters and setters raise exceptions
self.assertRaises(NotImplementedError, polygon._get_coords)
with self.assertRaises(NotImplementedError):
polygon.coords
# Geo interface
self.assertEqual(
polygon.__geo_interface__,
{'type': 'Polygon',
'coordinates': (((0.0, 0.0), (0.0, 1.0), (1.0, 1.0), (2.0, -1.0),
(0.0, 0.0)), ((0.25, 0.25), (0.25, 0.5),
(0.5, 0.5), (0.5, 0.25), (0.25, 0.25)))})
# Adapter
hole_coords = [((0.25, 0.25), (0.25, 0.5), (0.5, 0.5), (0.5, 0.25))]
pa = asPolygon(coords, hole_coords)
self.assertEqual(len(pa.exterior.coords), 5)
self.assertEqual(len(pa.interiors), 1)
self.assertEqual(len(pa.interiors[0].coords), 5)
# Test Non-operability of Null rings
r_null = LinearRing()
self.assertEqual(r_null.wkt, 'GEOMETRYCOLLECTION EMPTY')
self.assertEqual(r_null.length, 0.0)
# Check that we can set coordinates of a null geometry
r_null.coords = [(0, 0), (1, 1), (1, 0)]
self.assertAlmostEqual(r_null.length, 3.414213562373095)
# Error handling
with self.assertRaises(ValueError):
# A LinearRing must have at least 3 coordinate tuples
Polygon([[1, 2], [2, 3]])
def test_linearring_empty_mutate(self):
# Check that we can set coordinates of a null geometry
r_null = LinearRing()
r_null.coords = [(0, 0), (1, 1), (1, 0)]
self.assertAlmostEqual(r_null.length, 3.414213562373095)
