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