/usr/lib/python3/dist-packages/networkx/readwrite/tests/test_shp.py is in python3-networkx 1.11-2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 | """Unit tests for shp.
"""
import os
import tempfile
from nose import SkipTest
from nose.tools import assert_equal
import networkx as nx
class TestShp(object):
@classmethod
def setupClass(cls):
global ogr
try:
from osgeo import ogr
except ImportError:
raise SkipTest('ogr not available.')
def deletetmp(self, drv, *paths):
for p in paths:
if os.path.exists(p):
drv.DeleteDataSource(p)
def setUp(self):
def createlayer(driver):
lyr = shp.CreateLayer("edges", None, ogr.wkbLineString)
namedef = ogr.FieldDefn("Name", ogr.OFTString)
namedef.SetWidth(32)
lyr.CreateField(namedef)
return lyr
drv = ogr.GetDriverByName("ESRI Shapefile")
testdir = os.path.join(tempfile.gettempdir(), 'shpdir')
shppath = os.path.join(tempfile.gettempdir(), 'tmpshp.shp')
self.deletetmp(drv, testdir, shppath)
os.mkdir(testdir)
shp = drv.CreateDataSource(shppath)
lyr = createlayer(shp)
self.names = ['a', 'b', 'c', 'c'] # edgenames
self.paths = ([(1.0, 1.0), (2.0, 2.0)],
[(2.0, 2.0), (3.0, 3.0)],
[(0.9, 0.9), (4.0, 0.9), (4.0, 2.0)])
self.simplified_names = ['a', 'b', 'c'] # edgenames
self.simplified_paths = ([(1.0, 1.0), (2.0, 2.0)],
[(2.0, 2.0), (3.0, 3.0)],
[(0.9, 0.9), (4.0, 2.0)])
for path, name in zip(self.paths, self.names):
feat = ogr.Feature(lyr.GetLayerDefn())
g = ogr.Geometry(ogr.wkbLineString)
for p in path:
g.AddPoint_2D(*p)
feat.SetGeometry(g)
feat.SetField("Name", name)
lyr.CreateFeature(feat)
self.shppath = shppath
self.testdir = testdir
self.drv = drv
def testload(self):
def compare_graph_paths_names(g, paths, names):
expected = nx.DiGraph()
for p in paths:
expected.add_path(p)
assert_equal(sorted(expected.node), sorted(g.node))
assert_equal(sorted(expected.edges()), sorted(g.edges()))
g_names = [g.get_edge_data(s, e)['Name'] for s, e in g.edges()]
assert_equal(names, sorted(g_names))
# simplified
G = nx.read_shp(self.shppath)
compare_graph_paths_names(G, self.simplified_paths, \
self.simplified_names)
# unsimplified
G = nx.read_shp(self.shppath, simplify=False)
compare_graph_paths_names(G, self.paths, self.names)
def checkgeom(self, lyr, expected):
feature = lyr.GetNextFeature()
actualwkt = []
while feature:
actualwkt.append(feature.GetGeometryRef().ExportToWkt())
feature = lyr.GetNextFeature()
assert_equal(sorted(expected), sorted(actualwkt))
def test_geometryexport(self):
expectedpoints_simple = (
"POINT (1 1)",
"POINT (2 2)",
"POINT (3 3)",
"POINT (0.9 0.9)",
"POINT (4 2)"
)
expectedlines_simple = (
"LINESTRING (1 1,2 2)",
"LINESTRING (2 2,3 3)",
"LINESTRING (0.9 0.9,4.0 0.9,4 2)"
)
expectedpoints = (
"POINT (1 1)",
"POINT (2 2)",
"POINT (3 3)",
"POINT (0.9 0.9)",
"POINT (4.0 0.9)",
"POINT (4 2)"
)
expectedlines = (
"LINESTRING (1 1,2 2)",
"LINESTRING (2 2,3 3)",
"LINESTRING (0.9 0.9,4.0 0.9)",
"LINESTRING (4.0 0.9,4 2)"
)
tpath = os.path.join(tempfile.gettempdir(), 'shpdir')
G = nx.read_shp(self.shppath)
nx.write_shp(G, tpath)
shpdir = ogr.Open(tpath)
self.checkgeom(shpdir.GetLayerByName("nodes"), expectedpoints_simple)
self.checkgeom(shpdir.GetLayerByName("edges"), expectedlines_simple)
# Test unsimplified
# Nodes should have additional point,
# edges should be 'flattened'
G = nx.read_shp(self.shppath, simplify=False)
nx.write_shp(G, tpath)
shpdir = ogr.Open(tpath)
self.checkgeom(shpdir.GetLayerByName("nodes"), expectedpoints)
self.checkgeom(shpdir.GetLayerByName("edges"), expectedlines)
def test_attributeexport(self):
def testattributes(lyr, graph):
feature = lyr.GetNextFeature()
while feature:
coords = []
ref = feature.GetGeometryRef()
last = ref.GetPointCount() - 1
edge_nodes = (ref.GetPoint_2D(0), ref.GetPoint_2D(last))
name = feature.GetFieldAsString('Name')
assert_equal(graph.get_edge_data(*edge_nodes)['Name'], name)
feature = lyr.GetNextFeature()
tpath = os.path.join(tempfile.gettempdir(), 'shpdir')
G = nx.read_shp(self.shppath)
nx.write_shp(G, tpath)
shpdir = ogr.Open(tpath)
edges = shpdir.GetLayerByName("edges")
testattributes(edges, G)
def test_wkt_export(self):
G = nx.DiGraph()
tpath = os.path.join(tempfile.gettempdir(), 'shpdir')
points = (
"POINT (0.9 0.9)",
"POINT (4 2)"
)
line = (
"LINESTRING (0.9 0.9,4 2)",
)
G.add_node(1, Wkt=points[0])
G.add_node(2, Wkt=points[1])
G.add_edge(1, 2, Wkt=line[0])
try:
nx.write_shp(G, tpath)
except Exception as e:
assert False, e
shpdir = ogr.Open(tpath)
self.checkgeom(shpdir.GetLayerByName("nodes"), points)
self.checkgeom(shpdir.GetLayerByName("edges"), line)
def tearDown(self):
self.deletetmp(self.drv, self.testdir, self.shppath)
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