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Diffstat (limited to 'webapp/django/contrib/gis/tests/test_geos.py')
| -rw-r--r-- | webapp/django/contrib/gis/tests/test_geos.py | 775 |
1 files changed, 775 insertions, 0 deletions
diff --git a/webapp/django/contrib/gis/tests/test_geos.py b/webapp/django/contrib/gis/tests/test_geos.py new file mode 100644 index 0000000000..8ea450700c --- /dev/null +++ b/webapp/django/contrib/gis/tests/test_geos.py @@ -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()) |