def test_get_rings(geom):
if (shapely.get_type_id(geom) !=
shapely.GeometryType.POLYGON) or shapely.is_empty(geom):
rings = shapely.get_rings(geom)
assert len(rings) == 0
else:
rings = shapely.get_rings(geom)
assert len(rings) == 1
assert rings[0] == shapely.get_exterior_ring(geom)
def test_get_rings_return_index():
geom = np.array([polygon, None, empty_polygon, polygon_with_hole])
expected_parts = []
expected_index = []
for i, g in enumerate(geom):
if g is None or shapely.is_empty(g):
continue
expected_parts.append(shapely.get_exterior_ring(g))
expected_index.append(i)
for j in range(0, shapely.get_num_interior_rings(g)):
expected_parts.append(shapely.get_interior_ring(g, j))
expected_index.append(i)
parts, index = shapely.get_rings(geom, return_index=True)
assert len(parts) == len(expected_parts)
assert_geometries_equal(parts, expected_parts)
assert np.array_equal(index, expected_index)
def test_get_rings_holes():
rings = shapely.get_rings(polygon_with_hole)
assert len(rings) == 2
assert rings[0] == shapely.get_exterior_ring(polygon_with_hole)
assert rings[1] == shapely.get_interior_ring(polygon_with_hole, 0)