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# Copyright (c) 2008-2009 Aryeh Leib Taurog, all rights reserved.
# Modified from original contribution by Aryeh Leib Taurog, which was
# released under the New BSD license.
import unittest
from django.contrib.gis.geos import (
LinearRing,
LineString,
MultiPoint,
Point,
Polygon,
fromstr,
)
def api_get_distance(x):
return x.distance(Point(-200, -200))
def api_get_buffer(x):
return x.buffer(10)
def api_get_geom_typeid(x):
return x.geom_typeid
def api_get_num_coords(x):
return x.num_coords
def api_get_centroid(x):
return x.centroid
def api_get_empty(x):
return x.empty
def api_get_valid(x):
return x.valid
def api_get_simple(x):
return x.simple
def api_get_ring(x):
return x.ring
def api_get_boundary(x):
return x.boundary
def api_get_convex_hull(x):
return x.convex_hull
def api_get_extent(x):
return x.extent
def api_get_area(x):
return x.area
def api_get_length(x):
return x.length
geos_function_tests = [
val
for name, val in vars().items()
if hasattr(val, "__call__") and name.startswith("api_get_")
]
class GEOSMutationTest(unittest.TestCase):
"""
Tests Pythonic Mutability of Python GEOS geometry wrappers
get/set/delitem on a slice, normal list methods
"""
def test00_GEOSIndexException(self):
"Testing Geometry IndexError"
p = Point(1, 2)
for i in range(-2, 2):
p._checkindex(i)
with self.assertRaises(IndexError):
p._checkindex(2)
with self.assertRaises(IndexError):
p._checkindex(-3)
def test01_PointMutations(self):
"Testing Point mutations"
for p in (Point(1, 2, 3), fromstr("POINT (1 2 3)")):
self.assertEqual(
p._get_single_external(1), 2.0, "Point _get_single_external"
)
# _set_single
p._set_single(0, 100)
self.assertEqual(p.coords, (100.0, 2.0, 3.0), "Point _set_single")
# _set_list
p._set_list(2, (50, 3141))
self.assertEqual(p.coords, (50.0, 3141.0), "Point _set_list")
def test02_PointExceptions(self):
"Testing Point exceptions"
with self.assertRaises(TypeError):
Point(range(1))
with self.assertRaises(TypeError):
Point(range(4))
def test03_PointApi(self):
"Testing Point API"
q = Point(4, 5, 3)
for p in (Point(1, 2, 3), fromstr("POINT (1 2 3)")):
p[0:2] = [4, 5]
for f in geos_function_tests:
self.assertEqual(f(q), f(p), "Point " + f.__name__)
def test04_LineStringMutations(self):
"Testing LineString mutations"
for ls in (
LineString((1, 0), (4, 1), (6, -1)),
fromstr("LINESTRING (1 0,4 1,6 -1)"),
):
self.assertEqual(
ls._get_single_external(1),
(4.0, 1.0),
"LineString _get_single_external",
)
# _set_single
ls._set_single(0, (-50, 25))
self.assertEqual(
ls.coords,
((-50.0, 25.0), (4.0, 1.0), (6.0, -1.0)),
"LineString _set_single",
)
# _set_list
ls._set_list(2, ((-50.0, 25.0), (6.0, -1.0)))
self.assertEqual(
ls.coords, ((-50.0, 25.0), (6.0, -1.0)), "LineString _set_list"
)
lsa = LineString(ls.coords)
for f in geos_function_tests:
self.assertEqual(f(lsa), f(ls), "LineString " + f.__name__)
def test05_Polygon(self):
"Testing Polygon mutations"
for pg in (
Polygon(
((1, 0), (4, 1), (6, -1), (8, 10), (1, 0)),
((5, 4), (6, 4), (6, 3), (5, 4)),
),
fromstr("POLYGON ((1 0,4 1,6 -1,8 10,1 0),(5 4,6 4,6 3,5 4))"),
):
self.assertEqual(
pg._get_single_external(0),
LinearRing((1, 0), (4, 1), (6, -1), (8, 10), (1, 0)),
"Polygon _get_single_external(0)",
)
self.assertEqual(
pg._get_single_external(1),
LinearRing((5, 4), (6, 4), (6, 3), (5, 4)),
"Polygon _get_single_external(1)",
)
# _set_list
pg._set_list(
2,
(
((1, 2), (10, 0), (12, 9), (-1, 15), (1, 2)),
((4, 2), (5, 2), (5, 3), (4, 2)),
),
)
self.assertEqual(
pg.coords,
(
((1.0, 2.0), (10.0, 0.0), (12.0, 9.0), (-1.0, 15.0), (1.0, 2.0)),
((4.0, 2.0), (5.0, 2.0), (5.0, 3.0), (4.0, 2.0)),
),
"Polygon _set_list",
)
lsa = Polygon(*pg.coords)
for f in geos_function_tests:
self.assertEqual(f(lsa), f(pg), "Polygon " + f.__name__)
def test06_Collection(self):
"Testing Collection mutations"
points = (
MultiPoint(*map(Point, ((3, 4), (-1, 2), (5, -4), (2, 8)))),
fromstr("MULTIPOINT (3 4,-1 2,5 -4,2 8)"),
)
for mp in points:
self.assertEqual(
mp._get_single_external(2),
Point(5, -4),
"Collection _get_single_external",
)
mp._set_list(3, map(Point, ((5, 5), (3, -2), (8, 1))))
self.assertEqual(
mp.coords, ((5.0, 5.0), (3.0, -2.0), (8.0, 1.0)), "Collection _set_list"
)
lsa = MultiPoint(*map(Point, ((5, 5), (3, -2), (8, 1))))
for f in geos_function_tests:
self.assertEqual(f(lsa), f(mp), "MultiPoint " + f.__name__)
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