--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/app/django/contrib/gis/tests/test_geos.py Tue Oct 14 16:00:59 2008 +0000
@@ -0,0 +1,775 @@
+import random, unittest, sys
+from ctypes import ArgumentError
+from django.contrib.gis.geos import *
+from django.contrib.gis.geos.base import HAS_GDAL
+from django.contrib.gis.tests.geometries import *
+
+if HAS_NUMPY: from numpy import array
+if HAS_GDAL: from django.contrib.gis.gdal import OGRGeometry, SpatialReference, CoordTransform, GEOJSON
+
+class GEOSTest(unittest.TestCase):
+
+ @property
+ def null_srid(self):
+ """
+ Returns the proper null SRID depending on the GEOS version.
+ See the comments in `test15_srid` for more details.
+ """
+ info = geos_version_info()
+ if info['version'] == '3.0.0' and info['release_candidate']:
+ return -1
+ else:
+ return None
+
+ def test01a_wkt(self):
+ "Testing WKT output."
+ for g in wkt_out:
+ geom = fromstr(g.wkt)
+ self.assertEqual(g.ewkt, geom.wkt)
+
+ def test01b_hex(self):
+ "Testing HEX output."
+ for g in hex_wkt:
+ geom = fromstr(g.wkt)
+ self.assertEqual(g.hex, geom.hex)
+
+ def test01c_kml(self):
+ "Testing KML output."
+ for tg in wkt_out:
+ geom = fromstr(tg.wkt)
+ kml = getattr(tg, 'kml', False)
+ if kml: self.assertEqual(kml, geom.kml)
+
+ def test01d_errors(self):
+ "Testing the Error handlers."
+ # string-based
+ print "\nBEGIN - expecting GEOS_ERROR; safe to ignore.\n"
+ for err in errors:
+ try:
+ g = fromstr(err.wkt)
+ except (GEOSException, ValueError):
+ pass
+ print "\nEND - expecting GEOS_ERROR; safe to ignore.\n"
+
+ class NotAGeometry(object):
+ pass
+
+ # Some other object
+ self.assertRaises(TypeError, GEOSGeometry, NotAGeometry())
+ # None
+ self.assertRaises(TypeError, GEOSGeometry, None)
+ # Bad WKB
+ self.assertRaises(GEOSException, GEOSGeometry, buffer('0'))
+
+ def test01e_wkb(self):
+ "Testing WKB output."
+ from binascii import b2a_hex
+ for g in hex_wkt:
+ geom = fromstr(g.wkt)
+ wkb = geom.wkb
+ self.assertEqual(b2a_hex(wkb).upper(), g.hex)
+
+ def test01f_create_hex(self):
+ "Testing creation from HEX."
+ for g in hex_wkt:
+ geom_h = GEOSGeometry(g.hex)
+ # we need to do this so decimal places get normalised
+ geom_t = fromstr(g.wkt)
+ self.assertEqual(geom_t.wkt, geom_h.wkt)
+
+ def test01g_create_wkb(self):
+ "Testing creation from WKB."
+ from binascii import a2b_hex
+ for g in hex_wkt:
+ wkb = buffer(a2b_hex(g.hex))
+ geom_h = GEOSGeometry(wkb)
+ # we need to do this so decimal places get normalised
+ geom_t = fromstr(g.wkt)
+ self.assertEqual(geom_t.wkt, geom_h.wkt)
+
+ def test01h_ewkt(self):
+ "Testing EWKT."
+ srid = 32140
+ for p in polygons:
+ ewkt = 'SRID=%d;%s' % (srid, p.wkt)
+ poly = fromstr(ewkt)
+ self.assertEqual(srid, poly.srid)
+ self.assertEqual(srid, poly.shell.srid)
+ self.assertEqual(srid, fromstr(poly.ewkt).srid) # Checking export
+
+ def test01i_json(self):
+ "Testing GeoJSON input/output (via GDAL)."
+ if not HAS_GDAL or not GEOJSON: return
+ for g in json_geoms:
+ geom = GEOSGeometry(g.wkt)
+ self.assertEqual(g.json, geom.json)
+ self.assertEqual(g.json, geom.geojson)
+ self.assertEqual(GEOSGeometry(g.wkt), GEOSGeometry(geom.json))
+
+ def test01j_eq(self):
+ "Testing equivalence."
+ p = fromstr('POINT(5 23)')
+ self.assertEqual(p, p.wkt)
+ self.assertNotEqual(p, 'foo')
+ ls = fromstr('LINESTRING(0 0, 1 1, 5 5)')
+ self.assertEqual(ls, ls.wkt)
+ self.assertNotEqual(p, 'bar')
+ # Error shouldn't be raise on equivalence testing with
+ # an invalid type.
+ for g in (p, ls):
+ self.assertNotEqual(g, None)
+ self.assertNotEqual(g, {'foo' : 'bar'})
+ self.assertNotEqual(g, False)
+
+ def test02a_points(self):
+ "Testing Point objects."
+ prev = fromstr('POINT(0 0)')
+ for p in points:
+ # Creating the point from the WKT
+ pnt = fromstr(p.wkt)
+ self.assertEqual(pnt.geom_type, 'Point')
+ self.assertEqual(pnt.geom_typeid, 0)
+ self.assertEqual(p.x, pnt.x)
+ self.assertEqual(p.y, pnt.y)
+ self.assertEqual(True, pnt == fromstr(p.wkt))
+ self.assertEqual(False, pnt == prev)
+
+ # Making sure that the point's X, Y components are what we expect
+ self.assertAlmostEqual(p.x, pnt.tuple[0], 9)
+ self.assertAlmostEqual(p.y, pnt.tuple[1], 9)
+
+ # Testing the third dimension, and getting the tuple arguments
+ if hasattr(p, 'z'):
+ self.assertEqual(True, pnt.hasz)
+ self.assertEqual(p.z, pnt.z)
+ self.assertEqual(p.z, pnt.tuple[2], 9)
+ tup_args = (p.x, p.y, p.z)
+ set_tup1 = (2.71, 3.14, 5.23)
+ set_tup2 = (5.23, 2.71, 3.14)
+ else:
+ self.assertEqual(False, pnt.hasz)
+ self.assertEqual(None, pnt.z)
+ tup_args = (p.x, p.y)
+ set_tup1 = (2.71, 3.14)
+ set_tup2 = (3.14, 2.71)
+
+ # Centroid operation on point should be point itself
+ self.assertEqual(p.centroid, pnt.centroid.tuple)
+
+ # Now testing the different constructors
+ pnt2 = Point(tup_args) # e.g., Point((1, 2))
+ pnt3 = Point(*tup_args) # e.g., Point(1, 2)
+ self.assertEqual(True, pnt == pnt2)
+ self.assertEqual(True, pnt == pnt3)
+
+ # Now testing setting the x and y
+ pnt.y = 3.14
+ pnt.x = 2.71
+ self.assertEqual(3.14, pnt.y)
+ self.assertEqual(2.71, pnt.x)
+
+ # Setting via the tuple/coords property
+ pnt.tuple = set_tup1
+ self.assertEqual(set_tup1, pnt.tuple)
+ pnt.coords = set_tup2
+ self.assertEqual(set_tup2, pnt.coords)
+
+ prev = pnt # setting the previous geometry
+
+ def test02b_multipoints(self):
+ "Testing MultiPoint objects."
+ for mp in multipoints:
+ mpnt = fromstr(mp.wkt)
+ self.assertEqual(mpnt.geom_type, 'MultiPoint')
+ self.assertEqual(mpnt.geom_typeid, 4)
+
+ self.assertAlmostEqual(mp.centroid[0], mpnt.centroid.tuple[0], 9)
+ self.assertAlmostEqual(mp.centroid[1], mpnt.centroid.tuple[1], 9)
+
+ self.assertRaises(GEOSIndexError, mpnt.__getitem__, len(mpnt))
+ self.assertEqual(mp.centroid, mpnt.centroid.tuple)
+ self.assertEqual(mp.points, tuple(m.tuple for m in mpnt))
+ for p in mpnt:
+ self.assertEqual(p.geom_type, 'Point')
+ self.assertEqual(p.geom_typeid, 0)
+ self.assertEqual(p.empty, False)
+ self.assertEqual(p.valid, True)
+
+ def test03a_linestring(self):
+ "Testing LineString objects."
+ prev = fromstr('POINT(0 0)')
+ for l in linestrings:
+ ls = fromstr(l.wkt)
+ self.assertEqual(ls.geom_type, 'LineString')
+ self.assertEqual(ls.geom_typeid, 1)
+ self.assertEqual(ls.empty, False)
+ self.assertEqual(ls.ring, False)
+ if hasattr(l, 'centroid'):
+ self.assertEqual(l.centroid, ls.centroid.tuple)
+ if hasattr(l, 'tup'):
+ self.assertEqual(l.tup, ls.tuple)
+
+ self.assertEqual(True, ls == fromstr(l.wkt))
+ self.assertEqual(False, ls == prev)
+ self.assertRaises(GEOSIndexError, ls.__getitem__, len(ls))
+ prev = ls
+
+ # Creating a LineString from a tuple, list, and numpy array
+ self.assertEqual(ls, LineString(ls.tuple)) # tuple
+ self.assertEqual(ls, LineString(*ls.tuple)) # as individual arguments
+ self.assertEqual(ls, LineString([list(tup) for tup in ls.tuple])) # as list
+ self.assertEqual(ls.wkt, LineString(*tuple(Point(tup) for tup in ls.tuple)).wkt) # Point individual arguments
+ if HAS_NUMPY: self.assertEqual(ls, LineString(array(ls.tuple))) # as numpy array
+
+ def test03b_multilinestring(self):
+ "Testing MultiLineString objects."
+ prev = fromstr('POINT(0 0)')
+ for l in multilinestrings:
+ ml = fromstr(l.wkt)
+ self.assertEqual(ml.geom_type, 'MultiLineString')
+ self.assertEqual(ml.geom_typeid, 5)
+
+ self.assertAlmostEqual(l.centroid[0], ml.centroid.x, 9)
+ self.assertAlmostEqual(l.centroid[1], ml.centroid.y, 9)
+
+ self.assertEqual(True, ml == fromstr(l.wkt))
+ self.assertEqual(False, ml == prev)
+ prev = ml
+
+ for ls in ml:
+ self.assertEqual(ls.geom_type, 'LineString')
+ self.assertEqual(ls.geom_typeid, 1)
+ self.assertEqual(ls.empty, False)
+
+ self.assertRaises(GEOSIndexError, ml.__getitem__, len(ml))
+ self.assertEqual(ml.wkt, MultiLineString(*tuple(s.clone() for s in ml)).wkt)
+ self.assertEqual(ml, MultiLineString(*tuple(LineString(s.tuple) for s in ml)))
+
+ def test04_linearring(self):
+ "Testing LinearRing objects."
+ for rr in linearrings:
+ lr = fromstr(rr.wkt)
+ self.assertEqual(lr.geom_type, 'LinearRing')
+ self.assertEqual(lr.geom_typeid, 2)
+ self.assertEqual(rr.n_p, len(lr))
+ self.assertEqual(True, lr.valid)
+ self.assertEqual(False, lr.empty)
+
+ # Creating a LinearRing from a tuple, list, and numpy array
+ self.assertEqual(lr, LinearRing(lr.tuple))
+ self.assertEqual(lr, LinearRing(*lr.tuple))
+ self.assertEqual(lr, LinearRing([list(tup) for tup in lr.tuple]))
+ if HAS_NUMPY: self.assertEqual(lr, LinearRing(array(lr.tuple)))
+
+ def test05a_polygons(self):
+ "Testing Polygon objects."
+ prev = fromstr('POINT(0 0)')
+ for p in polygons:
+ # Creating the Polygon, testing its properties.
+ poly = fromstr(p.wkt)
+ self.assertEqual(poly.geom_type, 'Polygon')
+ self.assertEqual(poly.geom_typeid, 3)
+ self.assertEqual(poly.empty, False)
+ self.assertEqual(poly.ring, False)
+ self.assertEqual(p.n_i, poly.num_interior_rings)
+ self.assertEqual(p.n_i + 1, len(poly)) # Testing __len__
+ self.assertEqual(p.n_p, poly.num_points)
+
+ # Area & Centroid
+ self.assertAlmostEqual(p.area, poly.area, 9)
+ self.assertAlmostEqual(p.centroid[0], poly.centroid.tuple[0], 9)
+ self.assertAlmostEqual(p.centroid[1], poly.centroid.tuple[1], 9)
+
+ # Testing the geometry equivalence
+ self.assertEqual(True, poly == fromstr(p.wkt))
+ self.assertEqual(False, poly == prev) # Should not be equal to previous geometry
+ self.assertEqual(True, poly != prev)
+
+ # Testing the exterior ring
+ ring = poly.exterior_ring
+ self.assertEqual(ring.geom_type, 'LinearRing')
+ self.assertEqual(ring.geom_typeid, 2)
+ if p.ext_ring_cs:
+ self.assertEqual(p.ext_ring_cs, ring.tuple)
+ self.assertEqual(p.ext_ring_cs, poly[0].tuple) # Testing __getitem__
+
+ # Testing __getitem__ and __setitem__ on invalid indices
+ self.assertRaises(GEOSIndexError, poly.__getitem__, len(poly))
+ self.assertRaises(GEOSIndexError, poly.__setitem__, len(poly), False)
+ self.assertRaises(GEOSIndexError, poly.__getitem__, -1)
+
+ # Testing __iter__
+ for r in poly:
+ self.assertEqual(r.geom_type, 'LinearRing')
+ self.assertEqual(r.geom_typeid, 2)
+
+ # Testing polygon construction.
+ self.assertRaises(TypeError, Polygon.__init__, 0, [1, 2, 3])
+ self.assertRaises(TypeError, Polygon.__init__, 'foo')
+
+ # Polygon(shell, (hole1, ... holeN))
+ rings = tuple(r for r in poly)
+ self.assertEqual(poly, Polygon(rings[0], rings[1:]))
+
+ # Polygon(shell_tuple, hole_tuple1, ... , hole_tupleN)
+ ring_tuples = tuple(r.tuple for r in poly)
+ self.assertEqual(poly, Polygon(*ring_tuples))
+
+ # Constructing with tuples of LinearRings.
+ self.assertEqual(poly.wkt, Polygon(*tuple(r for r in poly)).wkt)
+ self.assertEqual(poly.wkt, Polygon(*tuple(LinearRing(r.tuple) for r in poly)).wkt)
+
+ def test05b_multipolygons(self):
+ "Testing MultiPolygon objects."
+ print "\nBEGIN - expecting GEOS_NOTICE; safe to ignore.\n"
+ prev = fromstr('POINT (0 0)')
+ for mp in multipolygons:
+ mpoly = fromstr(mp.wkt)
+ self.assertEqual(mpoly.geom_type, 'MultiPolygon')
+ self.assertEqual(mpoly.geom_typeid, 6)
+ self.assertEqual(mp.valid, mpoly.valid)
+
+ if mp.valid:
+ self.assertEqual(mp.num_geom, mpoly.num_geom)
+ self.assertEqual(mp.n_p, mpoly.num_coords)
+ self.assertEqual(mp.num_geom, len(mpoly))
+ self.assertRaises(GEOSIndexError, mpoly.__getitem__, len(mpoly))
+ for p in mpoly:
+ self.assertEqual(p.geom_type, 'Polygon')
+ self.assertEqual(p.geom_typeid, 3)
+ self.assertEqual(p.valid, True)
+ self.assertEqual(mpoly.wkt, MultiPolygon(*tuple(poly.clone() for poly in mpoly)).wkt)
+
+ print "\nEND - expecting GEOS_NOTICE; safe to ignore.\n"
+
+ def test06a_memory_hijinks(self):
+ "Testing Geometry __del__() on rings and polygons."
+ #### Memory issues with rings and polygons
+
+ # These tests are needed to ensure sanity with writable geometries.
+
+ # Getting a polygon with interior rings, and pulling out the interior rings
+ poly = fromstr(polygons[1].wkt)
+ ring1 = poly[0]
+ ring2 = poly[1]
+
+ # These deletes should be 'harmless' since they are done on child geometries
+ del ring1
+ del ring2
+ ring1 = poly[0]
+ ring2 = poly[1]
+
+ # Deleting the polygon
+ del poly
+
+ # Access to these rings is OK since they are clones.
+ s1, s2 = str(ring1), str(ring2)
+
+ # The previous hijinks tests are now moot because only clones are
+ # now used =)
+
+ def test08_coord_seq(self):
+ "Testing Coordinate Sequence objects."
+ for p in polygons:
+ if p.ext_ring_cs:
+ # Constructing the polygon and getting the coordinate sequence
+ poly = fromstr(p.wkt)
+ cs = poly.exterior_ring.coord_seq
+
+ self.assertEqual(p.ext_ring_cs, cs.tuple) # done in the Polygon test too.
+ self.assertEqual(len(p.ext_ring_cs), len(cs)) # Making sure __len__ works
+
+ # Checks __getitem__ and __setitem__
+ for i in xrange(len(p.ext_ring_cs)):
+ c1 = p.ext_ring_cs[i] # Expected value
+ c2 = cs[i] # Value from coordseq
+ self.assertEqual(c1, c2)
+
+ # Constructing the test value to set the coordinate sequence with
+ if len(c1) == 2: tset = (5, 23)
+ else: tset = (5, 23, 8)
+ cs[i] = tset
+
+ # Making sure every set point matches what we expect
+ for j in range(len(tset)):
+ cs[i] = tset
+ self.assertEqual(tset[j], cs[i][j])
+
+ def test09_relate_pattern(self):
+ "Testing relate() and relate_pattern()."
+ g = fromstr('POINT (0 0)')
+ self.assertRaises(GEOSException, g.relate_pattern, 0, 'invalid pattern, yo')
+ for i in xrange(len(relate_geoms)):
+ g_tup = relate_geoms[i]
+ a = fromstr(g_tup[0].wkt)
+ b = fromstr(g_tup[1].wkt)
+ pat = g_tup[2]
+ result = g_tup[3]
+ self.assertEqual(result, a.relate_pattern(b, pat))
+ self.assertEqual(pat, a.relate(b))
+
+ def test10_intersection(self):
+ "Testing intersects() and intersection()."
+ for i in xrange(len(topology_geoms)):
+ g_tup = topology_geoms[i]
+ a = fromstr(g_tup[0].wkt)
+ b = fromstr(g_tup[1].wkt)
+ i1 = fromstr(intersect_geoms[i].wkt)
+ self.assertEqual(True, a.intersects(b))
+ i2 = a.intersection(b)
+ self.assertEqual(i1, i2)
+ self.assertEqual(i1, a & b) # __and__ is intersection operator
+ a &= b # testing __iand__
+ self.assertEqual(i1, a)
+
+ def test11_union(self):
+ "Testing union()."
+ for i in xrange(len(topology_geoms)):
+ g_tup = topology_geoms[i]
+ a = fromstr(g_tup[0].wkt)
+ b = fromstr(g_tup[1].wkt)
+ u1 = fromstr(union_geoms[i].wkt)
+ u2 = a.union(b)
+ self.assertEqual(u1, u2)
+ self.assertEqual(u1, a | b) # __or__ is union operator
+ a |= b # testing __ior__
+ self.assertEqual(u1, a)
+
+ def test12_difference(self):
+ "Testing difference()."
+ for i in xrange(len(topology_geoms)):
+ g_tup = topology_geoms[i]
+ a = fromstr(g_tup[0].wkt)
+ b = fromstr(g_tup[1].wkt)
+ d1 = fromstr(diff_geoms[i].wkt)
+ d2 = a.difference(b)
+ self.assertEqual(d1, d2)
+ self.assertEqual(d1, a - b) # __sub__ is difference operator
+ a -= b # testing __isub__
+ self.assertEqual(d1, a)
+
+ def test13_symdifference(self):
+ "Testing sym_difference()."
+ for i in xrange(len(topology_geoms)):
+ g_tup = topology_geoms[i]
+ a = fromstr(g_tup[0].wkt)
+ b = fromstr(g_tup[1].wkt)
+ d1 = fromstr(sdiff_geoms[i].wkt)
+ d2 = a.sym_difference(b)
+ self.assertEqual(d1, d2)
+ self.assertEqual(d1, a ^ b) # __xor__ is symmetric difference operator
+ a ^= b # testing __ixor__
+ self.assertEqual(d1, a)
+
+ def test14_buffer(self):
+ "Testing buffer()."
+ for i in xrange(len(buffer_geoms)):
+ g_tup = buffer_geoms[i]
+ g = fromstr(g_tup[0].wkt)
+
+ # The buffer we expect
+ exp_buf = fromstr(g_tup[1].wkt)
+
+ # Can't use a floating-point for the number of quadsegs.
+ self.assertRaises(ArgumentError, g.buffer, g_tup[2], float(g_tup[3]))
+
+ # Constructing our buffer
+ buf = g.buffer(g_tup[2], g_tup[3])
+ self.assertEqual(exp_buf.num_coords, buf.num_coords)
+ self.assertEqual(len(exp_buf), len(buf))
+
+ # Now assuring that each point in the buffer is almost equal
+ for j in xrange(len(exp_buf)):
+ exp_ring = exp_buf[j]
+ buf_ring = buf[j]
+ self.assertEqual(len(exp_ring), len(buf_ring))
+ for k in xrange(len(exp_ring)):
+ # Asserting the X, Y of each point are almost equal (due to floating point imprecision)
+ self.assertAlmostEqual(exp_ring[k][0], buf_ring[k][0], 9)
+ self.assertAlmostEqual(exp_ring[k][1], buf_ring[k][1], 9)
+
+ def test15_srid(self):
+ "Testing the SRID property and keyword."
+ # Testing SRID keyword on Point
+ pnt = Point(5, 23, srid=4326)
+ self.assertEqual(4326, pnt.srid)
+ pnt.srid = 3084
+ self.assertEqual(3084, pnt.srid)
+ self.assertRaises(ArgumentError, pnt.set_srid, '4326')
+
+ # Testing SRID keyword on fromstr(), and on Polygon rings.
+ poly = fromstr(polygons[1].wkt, srid=4269)
+ self.assertEqual(4269, poly.srid)
+ for ring in poly: self.assertEqual(4269, ring.srid)
+ poly.srid = 4326
+ self.assertEqual(4326, poly.shell.srid)
+
+ # Testing SRID keyword on GeometryCollection
+ gc = GeometryCollection(Point(5, 23), LineString((0, 0), (1.5, 1.5), (3, 3)), srid=32021)
+ self.assertEqual(32021, gc.srid)
+ for i in range(len(gc)): self.assertEqual(32021, gc[i].srid)
+
+ # GEOS may get the SRID from HEXEWKB
+ # 'POINT(5 23)' at SRID=4326 in hex form -- obtained from PostGIS
+ # using `SELECT GeomFromText('POINT (5 23)', 4326);`.
+ hex = '0101000020E610000000000000000014400000000000003740'
+ p1 = fromstr(hex)
+ self.assertEqual(4326, p1.srid)
+
+ # In GEOS 3.0.0rc1-4 when the EWKB and/or HEXEWKB is exported,
+ # the SRID information is lost and set to -1 -- this is not a
+ # problem on the 3.0.0 version (another reason to upgrade).
+ exp_srid = self.null_srid
+
+ p2 = fromstr(p1.hex)
+ self.assertEqual(exp_srid, p2.srid)
+ p3 = fromstr(p1.hex, srid=-1) # -1 is intended.
+ self.assertEqual(-1, p3.srid)
+
+ def test16_mutable_geometries(self):
+ "Testing the mutability of Polygons and Geometry Collections."
+ ### Testing the mutability of Polygons ###
+ for p in polygons:
+ poly = fromstr(p.wkt)
+
+ # Should only be able to use __setitem__ with LinearRing geometries.
+ self.assertRaises(TypeError, poly.__setitem__, 0, LineString((1, 1), (2, 2)))
+
+ # Constructing the new shell by adding 500 to every point in the old shell.
+ shell_tup = poly.shell.tuple
+ new_coords = []
+ for point in shell_tup: new_coords.append((point[0] + 500., point[1] + 500.))
+ new_shell = LinearRing(*tuple(new_coords))
+
+ # Assigning polygon's exterior ring w/the new shell
+ poly.exterior_ring = new_shell
+ s = str(new_shell) # new shell is still accessible
+ self.assertEqual(poly.exterior_ring, new_shell)
+ self.assertEqual(poly[0], new_shell)
+
+ ### Testing the mutability of Geometry Collections
+ for tg in multipoints:
+ mp = fromstr(tg.wkt)
+ for i in range(len(mp)):
+ # Creating a random point.
+ pnt = mp[i]
+ new = Point(random.randint(1, 100), random.randint(1, 100))
+ # Testing the assignment
+ mp[i] = new
+ s = str(new) # what was used for the assignment is still accessible
+ self.assertEqual(mp[i], new)
+ self.assertEqual(mp[i].wkt, new.wkt)
+ self.assertNotEqual(pnt, mp[i])
+
+ # MultiPolygons involve much more memory management because each
+ # Polygon w/in the collection has its own rings.
+ for tg in multipolygons:
+ mpoly = fromstr(tg.wkt)
+ for i in xrange(len(mpoly)):
+ poly = mpoly[i]
+ old_poly = mpoly[i]
+ # Offsetting the each ring in the polygon by 500.
+ for j in xrange(len(poly)):
+ r = poly[j]
+ for k in xrange(len(r)): r[k] = (r[k][0] + 500., r[k][1] + 500.)
+ poly[j] = r
+
+ self.assertNotEqual(mpoly[i], poly)
+ # Testing the assignment
+ mpoly[i] = poly
+ s = str(poly) # Still accessible
+ self.assertEqual(mpoly[i], poly)
+ self.assertNotEqual(mpoly[i], old_poly)
+
+ # Extreme (!!) __setitem__ -- no longer works, have to detect
+ # in the first object that __setitem__ is called in the subsequent
+ # objects -- maybe mpoly[0, 0, 0] = (3.14, 2.71)?
+ #mpoly[0][0][0] = (3.14, 2.71)
+ #self.assertEqual((3.14, 2.71), mpoly[0][0][0])
+ # Doing it more slowly..
+ #self.assertEqual((3.14, 2.71), mpoly[0].shell[0])
+ #del mpoly
+
+ def test17_threed(self):
+ "Testing three-dimensional geometries."
+ # Testing a 3D Point
+ pnt = Point(2, 3, 8)
+ self.assertEqual((2.,3.,8.), pnt.coords)
+ self.assertRaises(TypeError, pnt.set_coords, (1.,2.))
+ pnt.coords = (1.,2.,3.)
+ self.assertEqual((1.,2.,3.), pnt.coords)
+
+ # Testing a 3D LineString
+ ls = LineString((2., 3., 8.), (50., 250., -117.))
+ self.assertEqual(((2.,3.,8.), (50.,250.,-117.)), ls.tuple)
+ self.assertRaises(TypeError, ls.__setitem__, 0, (1.,2.))
+ ls[0] = (1.,2.,3.)
+ self.assertEqual((1.,2.,3.), ls[0])
+
+ def test18_distance(self):
+ "Testing the distance() function."
+ # Distance to self should be 0.
+ pnt = Point(0, 0)
+ self.assertEqual(0.0, pnt.distance(Point(0, 0)))
+
+ # Distance should be 1
+ self.assertEqual(1.0, pnt.distance(Point(0, 1)))
+
+ # Distance should be ~ sqrt(2)
+ self.assertAlmostEqual(1.41421356237, pnt.distance(Point(1, 1)), 11)
+
+ # Distances are from the closest vertex in each geometry --
+ # should be 3 (distance from (2, 2) to (5, 2)).
+ ls1 = LineString((0, 0), (1, 1), (2, 2))
+ ls2 = LineString((5, 2), (6, 1), (7, 0))
+ self.assertEqual(3, ls1.distance(ls2))
+
+ def test19_length(self):
+ "Testing the length property."
+ # Points have 0 length.
+ pnt = Point(0, 0)
+ self.assertEqual(0.0, pnt.length)
+
+ # Should be ~ sqrt(2)
+ ls = LineString((0, 0), (1, 1))
+ self.assertAlmostEqual(1.41421356237, ls.length, 11)
+
+ # Should be circumfrence of Polygon
+ poly = Polygon(LinearRing((0, 0), (0, 1), (1, 1), (1, 0), (0, 0)))
+ self.assertEqual(4.0, poly.length)
+
+ # Should be sum of each element's length in collection.
+ mpoly = MultiPolygon(poly.clone(), poly)
+ self.assertEqual(8.0, mpoly.length)
+
+ def test20_emptyCollections(self):
+ "Testing empty geometries and collections."
+ gc1 = GeometryCollection([])
+ gc2 = fromstr('GEOMETRYCOLLECTION EMPTY')
+ pnt = fromstr('POINT EMPTY')
+ ls = fromstr('LINESTRING EMPTY')
+ poly = fromstr('POLYGON EMPTY')
+ mls = fromstr('MULTILINESTRING EMPTY')
+ mpoly1 = fromstr('MULTIPOLYGON EMPTY')
+ mpoly2 = MultiPolygon(())
+
+ for g in [gc1, gc2, pnt, ls, poly, mls, mpoly1, mpoly2]:
+ self.assertEqual(True, g.empty)
+
+ # Testing len() and num_geom.
+ if isinstance(g, Polygon):
+ self.assertEqual(1, len(g)) # Has one empty linear ring
+ self.assertEqual(1, g.num_geom)
+ self.assertEqual(0, len(g[0]))
+ elif isinstance(g, (Point, LineString)):
+ self.assertEqual(1, g.num_geom)
+ self.assertEqual(0, len(g))
+ else:
+ self.assertEqual(0, g.num_geom)
+ self.assertEqual(0, len(g))
+
+ # Testing __getitem__ (doesn't work on Point or Polygon)
+ if isinstance(g, Point):
+ self.assertRaises(GEOSIndexError, g.get_x)
+ elif isinstance(g, Polygon):
+ lr = g.shell
+ self.assertEqual('LINEARRING EMPTY', lr.wkt)
+ self.assertEqual(0, len(lr))
+ self.assertEqual(True, lr.empty)
+ self.assertRaises(GEOSIndexError, lr.__getitem__, 0)
+ else:
+ self.assertRaises(GEOSIndexError, g.__getitem__, 0)
+
+ def test21_test_gdal(self):
+ "Testing `ogr` and `srs` properties."
+ if not HAS_GDAL: return
+ g1 = fromstr('POINT(5 23)')
+ self.assertEqual(True, isinstance(g1.ogr, OGRGeometry))
+ self.assertEqual(g1.srs, None)
+
+ g2 = fromstr('LINESTRING(0 0, 5 5, 23 23)', srid=4326)
+ self.assertEqual(True, isinstance(g2.ogr, OGRGeometry))
+ self.assertEqual(True, isinstance(g2.srs, SpatialReference))
+ self.assertEqual(g2.hex, g2.ogr.hex)
+ self.assertEqual('WGS 84', g2.srs.name)
+
+ def test22_copy(self):
+ "Testing use with the Python `copy` module."
+ import copy
+ poly = GEOSGeometry('POLYGON((0 0, 0 23, 23 23, 23 0, 0 0), (5 5, 5 10, 10 10, 10 5, 5 5))')
+ cpy1 = copy.copy(poly)
+ cpy2 = copy.deepcopy(poly)
+ self.assertNotEqual(poly._ptr, cpy1._ptr)
+ self.assertNotEqual(poly._ptr, cpy2._ptr)
+
+ def test23_transform(self):
+ "Testing `transform` method."
+ if not HAS_GDAL: return
+ orig = GEOSGeometry('POINT (-104.609 38.255)', 4326)
+ trans = GEOSGeometry('POINT (992385.4472045 481455.4944650)', 2774)
+
+ # Using a srid, a SpatialReference object, and a CoordTransform object
+ # for transformations.
+ t1, t2, t3 = orig.clone(), orig.clone(), orig.clone()
+ t1.transform(trans.srid)
+ t2.transform(SpatialReference('EPSG:2774'))
+ ct = CoordTransform(SpatialReference('WGS84'), SpatialReference(2774))
+ t3.transform(ct)
+
+ # Testing use of the `clone` keyword.
+ k1 = orig.clone()
+ k2 = k1.transform(trans.srid, clone=True)
+ self.assertEqual(k1, orig)
+ self.assertNotEqual(k1, k2)
+
+ prec = 3
+ for p in (t1, t2, t3, k2):
+ self.assertAlmostEqual(trans.x, p.x, prec)
+ self.assertAlmostEqual(trans.y, p.y, prec)
+
+ def test24_extent(self):
+ "Testing `extent` method."
+ # The xmin, ymin, xmax, ymax of the MultiPoint should be returned.
+ mp = MultiPoint(Point(5, 23), Point(0, 0), Point(10, 50))
+ self.assertEqual((0.0, 0.0, 10.0, 50.0), mp.extent)
+ pnt = Point(5.23, 17.8)
+ # Extent of points is just the point itself repeated.
+ self.assertEqual((5.23, 17.8, 5.23, 17.8), pnt.extent)
+ # Testing on the 'real world' Polygon.
+ poly = fromstr(polygons[3].wkt)
+ ring = poly.shell
+ x, y = ring.x, ring.y
+ xmin, ymin = min(x), min(y)
+ xmax, ymax = max(x), max(y)
+ self.assertEqual((xmin, ymin, xmax, ymax), poly.extent)
+
+ def test25_pickle(self):
+ "Testing pickling and unpickling support."
+ # Using both pickle and cPickle -- just 'cause.
+ import pickle, cPickle
+
+ # Creating a list of test geometries for pickling,
+ # and setting the SRID on some of them.
+ def get_geoms(lst, srid=None):
+ return [GEOSGeometry(tg.wkt, srid) for tg in lst]
+ tgeoms = get_geoms(points)
+ tgeoms.extend(get_geoms(multilinestrings, 4326))
+ tgeoms.extend(get_geoms(polygons, 3084))
+ tgeoms.extend(get_geoms(multipolygons, 900913))
+
+ # The SRID won't be exported in GEOS 3.0 release candidates.
+ no_srid = self.null_srid == -1
+ for geom in tgeoms:
+ s1, s2 = cPickle.dumps(geom), pickle.dumps(geom)
+ g1, g2 = cPickle.loads(s1), pickle.loads(s2)
+ for tmpg in (g1, g2):
+ self.assertEqual(geom, tmpg)
+ if not no_srid: self.assertEqual(geom.srid, tmpg.srid)
+
+def suite():
+ s = unittest.TestSuite()
+ s.addTest(unittest.makeSuite(GEOSTest))
+ return s
+
+def run(verbosity=2):
+ unittest.TextTestRunner(verbosity=verbosity).run(suite())