948 lines
38 KiB
Python
948 lines
38 KiB
Python
import ctypes, random, unittest, sys
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from django.contrib.gis.geos import *
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from django.contrib.gis.geos.base import gdal, numpy, GEOSBase
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from django.contrib.gis.geos.libgeos import GEOS_PREPARE
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from django.contrib.gis.geometry.test_data import TestDataMixin
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class GEOSTest(unittest.TestCase, TestDataMixin):
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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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def test00_base(self):
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"Tests out the GEOSBase class."
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# Testing out GEOSBase class, which provides a `ptr` property
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# that abstracts out access to underlying C pointers.
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class FakeGeom1(GEOSBase):
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pass
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# This one only accepts pointers to floats
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c_float_p = ctypes.POINTER(ctypes.c_float)
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class FakeGeom2(GEOSBase):
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ptr_type = c_float_p
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# Default ptr_type is `c_void_p`.
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fg1 = FakeGeom1()
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# Default ptr_type is C float pointer
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fg2 = FakeGeom2()
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# These assignments are OK -- None is allowed because
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# it's equivalent to the NULL pointer.
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fg1.ptr = ctypes.c_void_p()
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fg1.ptr = None
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fg2.ptr = c_float_p(ctypes.c_float(5.23))
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fg2.ptr = None
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# Because pointers have been set to NULL, an exception should be
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# raised when we try to access it. Raising an exception is
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# preferrable to a segmentation fault that commonly occurs when
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# a C method is given a NULL memory reference.
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for fg in (fg1, fg2):
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# Equivalent to `fg.ptr`
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self.assertRaises(GEOSException, fg._get_ptr)
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# Anything that is either not None or the acceptable pointer type will
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# result in a TypeError when trying to assign it to the `ptr` property.
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# Thus, memmory addresses (integers) and pointers of the incorrect type
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# (in `bad_ptrs`) will not be allowed.
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bad_ptrs = (5, ctypes.c_char_p('foobar'))
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for bad_ptr in bad_ptrs:
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# Equivalent to `fg.ptr = bad_ptr`
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self.assertRaises(TypeError, fg1._set_ptr, bad_ptr)
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self.assertRaises(TypeError, fg2._set_ptr, bad_ptr)
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def test01a_wkt(self):
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"Testing WKT output."
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for g in self.geometries.wkt_out:
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geom = fromstr(g.wkt)
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self.assertEqual(g.ewkt, geom.wkt)
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def test01b_hex(self):
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"Testing HEX output."
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for g in self.geometries.hex_wkt:
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geom = fromstr(g.wkt)
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self.assertEqual(g.hex, geom.hex)
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def test01b_hexewkb(self):
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"Testing (HEX)EWKB output."
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from binascii import a2b_hex
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# For testing HEX(EWKB).
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ogc_hex = '01010000000000000000000000000000000000F03F'
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# `SELECT ST_AsHEXEWKB(ST_GeomFromText('POINT(0 1)', 4326));`
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hexewkb_2d = '0101000020E61000000000000000000000000000000000F03F'
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# `SELECT ST_AsHEXEWKB(ST_GeomFromEWKT('SRID=4326;POINT(0 1 2)'));`
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hexewkb_3d = '01010000A0E61000000000000000000000000000000000F03F0000000000000040'
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pnt_2d = Point(0, 1, srid=4326)
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pnt_3d = Point(0, 1, 2, srid=4326)
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# OGC-compliant HEX will not have SRID nor Z value.
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self.assertEqual(ogc_hex, pnt_2d.hex)
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self.assertEqual(ogc_hex, pnt_3d.hex)
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# HEXEWKB should be appropriate for its dimension -- have to use an
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# a WKBWriter w/dimension set accordingly, else GEOS will insert
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# garbage into 3D coordinate if there is none. Also, GEOS has a
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# a bug in versions prior to 3.1 that puts the X coordinate in
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# place of Z; an exception should be raised on those versions.
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self.assertEqual(hexewkb_2d, pnt_2d.hexewkb)
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if GEOS_PREPARE:
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self.assertEqual(hexewkb_3d, pnt_3d.hexewkb)
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self.assertEqual(True, GEOSGeometry(hexewkb_3d).hasz)
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else:
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try:
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hexewkb = pnt_3d.hexewkb
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except GEOSException:
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pass
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else:
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self.fail('Should have raised GEOSException.')
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# Same for EWKB.
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self.assertEqual(buffer(a2b_hex(hexewkb_2d)), pnt_2d.ewkb)
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if GEOS_PREPARE:
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self.assertEqual(buffer(a2b_hex(hexewkb_3d)), pnt_3d.ewkb)
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else:
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try:
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ewkb = pnt_3d.ewkb
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except GEOSException:
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pass
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else:
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self.fail('Should have raised GEOSException')
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# Redundant sanity check.
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self.assertEqual(4326, GEOSGeometry(hexewkb_2d).srid)
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def test01c_kml(self):
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"Testing KML output."
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for tg in self.geometries.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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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 self.geometries.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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# Bad WKB
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self.assertRaises(GEOSException, GEOSGeometry, buffer('0'))
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print "\nEND - expecting GEOS_ERROR; safe to ignore.\n"
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class NotAGeometry(object):
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pass
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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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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 self.geometries.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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def test01f_create_hex(self):
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"Testing creation from HEX."
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for g in self.geometries.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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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 self.geometries.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 self.geometries.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 gdal or not gdal.GEOJSON: return
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for g in self.geometries.json_geoms:
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geom = GEOSGeometry(g.wkt)
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if not hasattr(g, 'not_equal'):
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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 test01k_fromfile(self):
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"Testing the fromfile() factory."
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from StringIO import StringIO
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ref_pnt = GEOSGeometry('POINT(5 23)')
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wkt_f = StringIO()
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wkt_f.write(ref_pnt.wkt)
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wkb_f = StringIO()
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wkb_f.write(str(ref_pnt.wkb))
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# Other tests use `fromfile()` on string filenames so those
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# aren't tested here.
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for fh in (wkt_f, wkb_f):
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fh.seek(0)
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pnt = fromfile(fh)
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self.assertEqual(ref_pnt, pnt)
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def test01k_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 self.geometries.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 self.geometries.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.coords, 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 self.geometries.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 numpy: self.assertEqual(ls, LineString(numpy.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 self.geometries.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 self.geometries.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 numpy: self.assertEqual(lr, LinearRing(numpy.array(lr.tuple)))
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def test05a_polygons(self):
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"Testing Polygon objects."
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# Testing `from_bbox` class method
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bbox = (-180, -90, 180, 90)
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p = Polygon.from_bbox( bbox )
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self.assertEqual(bbox, p.extent)
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prev = fromstr('POINT(0 0)')
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for p in self.geometries.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 * len(poly) - 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 self.geometries.multipolygons:
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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(self.geometries.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)
|
|
|
|
def test08_coord_seq(self):
|
|
"Testing Coordinate Sequence objects."
|
|
for p in self.geometries.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 rg in self.geometries.relate_geoms:
|
|
a = fromstr(rg.wkt_a)
|
|
b = fromstr(rg.wkt_b)
|
|
self.assertEqual(rg.result, a.relate_pattern(b, rg.pattern))
|
|
self.assertEqual(rg.pattern, a.relate(b))
|
|
|
|
def test10_intersection(self):
|
|
"Testing intersects() and intersection()."
|
|
for i in xrange(len(self.geometries.topology_geoms)):
|
|
a = fromstr(self.geometries.topology_geoms[i].wkt_a)
|
|
b = fromstr(self.geometries.topology_geoms[i].wkt_b)
|
|
i1 = fromstr(self.geometries.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(self.geometries.topology_geoms)):
|
|
a = fromstr(self.geometries.topology_geoms[i].wkt_a)
|
|
b = fromstr(self.geometries.topology_geoms[i].wkt_b)
|
|
u1 = fromstr(self.geometries.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(self.geometries.topology_geoms)):
|
|
a = fromstr(self.geometries.topology_geoms[i].wkt_a)
|
|
b = fromstr(self.geometries.topology_geoms[i].wkt_b)
|
|
d1 = fromstr(self.geometries.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(self.geometries.topology_geoms)):
|
|
a = fromstr(self.geometries.topology_geoms[i].wkt_a)
|
|
b = fromstr(self.geometries.topology_geoms[i].wkt_b)
|
|
d1 = fromstr(self.geometries.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 bg in self.geometries.buffer_geoms:
|
|
g = fromstr(bg.wkt)
|
|
|
|
# The buffer we expect
|
|
exp_buf = fromstr(bg.buffer_wkt)
|
|
quadsegs = bg.quadsegs
|
|
width = bg.width
|
|
|
|
# Can't use a floating-point for the number of quadsegs.
|
|
self.assertRaises(ctypes.ArgumentError, g.buffer, width, float(quadsegs))
|
|
|
|
# Constructing our buffer
|
|
buf = g.buffer(width, quadsegs)
|
|
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(ctypes.ArgumentError, pnt.set_srid, '4326')
|
|
|
|
# Testing SRID keyword on fromstr(), and on Polygon rings.
|
|
poly = fromstr(self.geometries.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 self.geometries.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 self.geometries.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 self.geometries.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 test20a_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 test20b_collections_of_collections(self):
|
|
"Testing GeometryCollection handling of other collections."
|
|
# Creating a GeometryCollection WKT string composed of other
|
|
# collections and polygons.
|
|
coll = [mp.wkt for mp in self.geometries.multipolygons if mp.valid]
|
|
coll.extend([mls.wkt for mls in self.geometries.multilinestrings])
|
|
coll.extend([p.wkt for p in self.geometries.polygons])
|
|
coll.extend([mp.wkt for mp in self.geometries.multipoints])
|
|
gc_wkt = 'GEOMETRYCOLLECTION(%s)' % ','.join(coll)
|
|
|
|
# Should construct ok from WKT
|
|
gc1 = GEOSGeometry(gc_wkt)
|
|
|
|
# Should also construct ok from individual geometry arguments.
|
|
gc2 = GeometryCollection(*tuple(g for g in gc1))
|
|
|
|
# And, they should be equal.
|
|
self.assertEqual(gc1, gc2)
|
|
|
|
def test21_test_gdal(self):
|
|
"Testing `ogr` and `srs` properties."
|
|
if not gdal.HAS_GDAL: return
|
|
g1 = fromstr('POINT(5 23)')
|
|
self.assertEqual(True, isinstance(g1.ogr, gdal.OGRGeometry))
|
|
self.assertEqual(g1.srs, None)
|
|
|
|
g2 = fromstr('LINESTRING(0 0, 5 5, 23 23)', srid=4326)
|
|
self.assertEqual(True, isinstance(g2.ogr, gdal.OGRGeometry))
|
|
self.assertEqual(True, isinstance(g2.srs, gdal.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 django.utils.copycompat as 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 gdal.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(gdal.SpatialReference('EPSG:2774'))
|
|
ct = gdal.CoordTransform(gdal.SpatialReference('WGS84'), gdal.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(self.geometries.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(self.geometries.points)
|
|
tgeoms.extend(get_geoms(self.geometries.multilinestrings, 4326))
|
|
tgeoms.extend(get_geoms(self.geometries.polygons, 3084))
|
|
tgeoms.extend(get_geoms(self.geometries.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 test26_prepared(self):
|
|
"Testing PreparedGeometry support."
|
|
if not GEOS_PREPARE: return
|
|
# Creating a simple multipolygon and getting a prepared version.
|
|
mpoly = GEOSGeometry('MULTIPOLYGON(((0 0,0 5,5 5,5 0,0 0)),((5 5,5 10,10 10,10 5,5 5)))')
|
|
prep = mpoly.prepared
|
|
|
|
# A set of test points.
|
|
pnts = [Point(5, 5), Point(7.5, 7.5), Point(2.5, 7.5)]
|
|
covers = [True, True, False] # No `covers` op for regular GEOS geoms.
|
|
for pnt, c in zip(pnts, covers):
|
|
# Results should be the same (but faster)
|
|
self.assertEqual(mpoly.contains(pnt), prep.contains(pnt))
|
|
self.assertEqual(mpoly.intersects(pnt), prep.intersects(pnt))
|
|
self.assertEqual(c, prep.covers(pnt))
|
|
|
|
def test26_line_merge(self):
|
|
"Testing line merge support"
|
|
ref_geoms = (fromstr('LINESTRING(1 1, 1 1, 3 3)'),
|
|
fromstr('MULTILINESTRING((1 1, 3 3), (3 3, 4 2))'),
|
|
)
|
|
ref_merged = (fromstr('LINESTRING(1 1, 3 3)'),
|
|
fromstr('LINESTRING (1 1, 3 3, 4 2)'),
|
|
)
|
|
for geom, merged in zip(ref_geoms, ref_merged):
|
|
self.assertEqual(merged, geom.merged)
|
|
|
|
def test27_valid_reason(self):
|
|
"Testing IsValidReason support"
|
|
# Skipping tests if GEOS < v3.1.
|
|
if not GEOS_PREPARE: return
|
|
|
|
g = GEOSGeometry("POINT(0 0)")
|
|
self.assert_(g.valid)
|
|
self.assert_(isinstance(g.valid_reason, basestring))
|
|
self.assertEqual(g.valid_reason, "Valid Geometry")
|
|
|
|
print "\nBEGIN - expecting GEOS_NOTICE; safe to ignore.\n"
|
|
|
|
g = GEOSGeometry("LINESTRING(0 0, 0 0)")
|
|
|
|
self.assert_(not g.valid)
|
|
self.assert_(isinstance(g.valid_reason, basestring))
|
|
self.assert_(g.valid_reason.startswith("Too few points in geometry component"))
|
|
|
|
print "\nEND - expecting GEOS_NOTICE; safe to ignore.\n"
|
|
|
|
def suite():
|
|
s = unittest.TestSuite()
|
|
s.addTest(unittest.makeSuite(GEOSTest))
|
|
return s
|
|
|
|
def run(verbosity=2):
|
|
unittest.TextTestRunner(verbosity=verbosity).run(suite())
|