| 1 |
# Copyright (c) 2002 by Intevation GmbH |
| 2 |
# Authors: |
| 3 |
# Bernhard Herzog <[email protected]> |
| 4 |
# |
| 5 |
# This program is free software under the GPL (>=v2) |
| 6 |
# Read the file COPYING coming with Thuban for details. |
| 7 |
|
| 8 |
""" |
| 9 |
Test the Thuban-specific Projection class |
| 10 |
""" |
| 11 |
|
| 12 |
__version__ = "$Revision$" |
| 13 |
# $Source$ |
| 14 |
# $Id$ |
| 15 |
|
| 16 |
import unittest |
| 17 |
import os |
| 18 |
|
| 19 |
import support |
| 20 |
support.initthuban() |
| 21 |
|
| 22 |
from Thuban.Model.proj import Projection, ProjFile |
| 23 |
|
| 24 |
import Thuban.Model.resource as resource |
| 25 |
|
| 26 |
from test_save import sax_eventlist |
| 27 |
|
| 28 |
from xml.sax import SAXParseException |
| 29 |
|
| 30 |
|
| 31 |
class TestProjection(unittest.TestCase, support.FloatComparisonMixin): |
| 32 |
|
| 33 |
"""Test cases for the Thuban-specific Projection class |
| 34 |
""" |
| 35 |
|
| 36 |
def test(self): |
| 37 |
"""Test Projection""" |
| 38 |
proj = Projection(["zone=26", "proj=utm", "ellps=clrk66"]) |
| 39 |
self.assertEquals(proj.params, ["zone=26", "proj=utm", "ellps=clrk66"]) |
| 40 |
|
| 41 |
# It's not clear whether this value is really the correct one |
| 42 |
# but a test failure here probably still means a bug somewhere |
| 43 |
self.assertFloatSeqEqual(proj.Forward(0, 0), |
| 44 |
[3623101.8103431347, 0.0], |
| 45 |
epsilon = 1e-5) |
| 46 |
self.assertFloatSeqEqual(proj.Inverse(3623101.8103431347, 0.0), |
| 47 |
[-0.00065775699878736467, 0]) |
| 48 |
|
| 49 |
self.assertFloatSeqEqual(proj.ForwardBBox((0, 0, 2, 2)), |
| 50 |
(3620891.3077618643, 0.0, |
| 51 |
3875381.8535437919, 252962.10480170773), |
| 52 |
epsilon = 1e-5) |
| 53 |
|
| 54 |
self.assertEquals(proj.GetParameter("zone"), "26") |
| 55 |
self.assertEquals(proj.GetParameter("proj"), "utm") |
| 56 |
self.assertEquals(proj.GetParameter("ellps"), "clrk66") |
| 57 |
self.assertEquals(proj.GetParameter("hallo"), "") |
| 58 |
|
| 59 |
|
| 60 |
sample_projfile = '''\ |
| 61 |
<?xml version="1.0" encoding="UTF-8"?> |
| 62 |
<!DOCTYPE projfile SYSTEM "thuban.dtd"> |
| 63 |
<projectionlist> |
| 64 |
<projection name="Transverse Mercartor"> |
| 65 |
<parameter value="proj=tmerc"/> |
| 66 |
<parameter value="ellps=clrk66"/> |
| 67 |
<parameter value="lat_0=90w"/> |
| 68 |
<parameter value="lon_0=90w"/> |
| 69 |
<parameter value="k=1"/> |
| 70 |
</projection> |
| 71 |
<projection name="Transverse Mercartor"> |
| 72 |
<parameter value="proj=tmerc"/> |
| 73 |
<parameter value="ellps=clrk66"/> |
| 74 |
<parameter value="lat_0=30w"/> |
| 75 |
<parameter value="lon_0=30w"/> |
| 76 |
<parameter value="k=1"/> |
| 77 |
</projection> |
| 78 |
<projection name="Universal Transverse Mercartor"> |
| 79 |
<parameter value="proj=utm"/> |
| 80 |
<parameter value="ellps=clrk66"/> |
| 81 |
<parameter value="zone=1"/> |
| 82 |
</projection> |
| 83 |
</projectionlist> |
| 84 |
''' |
| 85 |
|
| 86 |
sample_projfile_data = [("Transverse Mercartor", ["proj=tmerc", |
| 87 |
"ellps=clrk66", |
| 88 |
"lat_0=90w", |
| 89 |
"lon_0=90w", |
| 90 |
"k=1"]), |
| 91 |
("Transverse Mercartor", ["proj=tmerc", |
| 92 |
"ellps=clrk66", |
| 93 |
"lat_0=30w", |
| 94 |
"lon_0=30w", |
| 95 |
"k=1"]), |
| 96 |
("Universal Transverse Mercartor", ["proj=utm", |
| 97 |
"ellps=clrk66", |
| 98 |
"zone=1"])] |
| 99 |
|
| 100 |
sample_projfile2 = '''\ |
| 101 |
<?xml version="1.0" encoding="UTF-8"?> |
| 102 |
<!DOCTYPE projfile SYSTEM "thuban.dtd"> |
| 103 |
<projectionlist> |
| 104 |
</projectionlist> |
| 105 |
''' |
| 106 |
|
| 107 |
sample_projfile_data2 = [] |
| 108 |
|
| 109 |
class TestProjFile(unittest.TestCase, support.FileTestMixin): |
| 110 |
|
| 111 |
"""Test cases for reading and writing projection files. |
| 112 |
""" |
| 113 |
|
| 114 |
def compare_xml(self, xml1, xml2): |
| 115 |
self.assertEquals(sax_eventlist(xml1), sax_eventlist(xml2)) |
| 116 |
|
| 117 |
def test(self): |
| 118 |
"""Test ProjFile""" |
| 119 |
|
| 120 |
proj0 = Projection(["proj=tmerc", "ellps=clrk66"]) |
| 121 |
proj1 = Projection(["proj=utm", "ellps=clrk66"]) |
| 122 |
proj2 = Projection(["proj=lcc", "ellps=clrk66"]) |
| 123 |
|
| 124 |
eq = self.assertEquals |
| 125 |
|
| 126 |
# |
| 127 |
# __init__() |
| 128 |
# GetFilename() |
| 129 |
# SetFilename() |
| 130 |
# |
| 131 |
for name in ["", "hello_world"]: |
| 132 |
projFile = ProjFile(name) |
| 133 |
eq(projFile.GetFilename(), name) |
| 134 |
|
| 135 |
projFile.SetFilename("XXX") |
| 136 |
projFile.SetFilename(name) |
| 137 |
eq(projFile.GetFilename(), name) |
| 138 |
|
| 139 |
# initial number of projections should be 0 |
| 140 |
eq(len(projFile.GetProjections()), 0) |
| 141 |
|
| 142 |
# |
| 143 |
# Add() |
| 144 |
# Remove() |
| 145 |
# |
| 146 |
projFile.Add(proj0) |
| 147 |
eq(len(projFile.GetProjections()), 1) |
| 148 |
projFile.Remove(proj0) |
| 149 |
eq(len(projFile.GetProjections()), 0) |
| 150 |
|
| 151 |
# try to remove something that doesn't exist |
| 152 |
self.assertRaises(ValueError, projFile.Remove, proj0) |
| 153 |
|
| 154 |
projFile.Add(proj0) |
| 155 |
projFile.Add(proj1) |
| 156 |
projFile.Add(proj2) |
| 157 |
eq(len(projFile.GetProjections()), 3) |
| 158 |
|
| 159 |
# GetProjections() -- tests order |
| 160 |
projs = projFile.GetProjections() |
| 161 |
eq(projs[0], proj0) |
| 162 |
eq(projs[1], proj1) |
| 163 |
eq(projs[2], proj2) |
| 164 |
|
| 165 |
def testRead(self): |
| 166 |
"""Test ReadProjFile""" |
| 167 |
|
| 168 |
self.doTestRead(sample_projfile_data, sample_projfile) |
| 169 |
self.doTestRead(sample_projfile_data2, sample_projfile2) |
| 170 |
|
| 171 |
# |
| 172 |
# file doesn't exist |
| 173 |
# |
| 174 |
self.assertRaises(IOError, |
| 175 |
resource.ReadProjFile, self.temp_file_name("nonexistent.proj")) |
| 176 |
|
| 177 |
# |
| 178 |
# file isn't readable |
| 179 |
# |
| 180 |
filename = self.temp_file_name("projfile.proj") |
| 181 |
file = open(filename, "w") |
| 182 |
file.close() |
| 183 |
os.chmod(filename, 0200) # write-only |
| 184 |
self.assertRaises(IOError, resource.ReadProjFile, filename) |
| 185 |
os.chmod(filename, 0600) # read/write so we reuse the file |
| 186 |
|
| 187 |
# |
| 188 |
# file has invalid XML (or none at all) |
| 189 |
# |
| 190 |
filename = self.temp_file_name("projfile.proj") |
| 191 |
file = open(filename, "w") |
| 192 |
file.close() |
| 193 |
|
| 194 |
self.assertRaises(SAXParseException, resource.ReadProjFile, filename) |
| 195 |
|
| 196 |
def testWrite(self): |
| 197 |
"""Test WriteProjFile""" |
| 198 |
|
| 199 |
self.doTestWrite(sample_projfile_data, sample_projfile) |
| 200 |
self.doTestWrite(sample_projfile_data2, sample_projfile2) |
| 201 |
|
| 202 |
def doTestWrite(self, data, expected): |
| 203 |
|
| 204 |
filename = self.temp_file_name("projfile.proj") |
| 205 |
|
| 206 |
pf = ProjFile(filename) |
| 207 |
for proj in data: |
| 208 |
pf.Add(Projection(proj[1], proj[0])) |
| 209 |
|
| 210 |
resource.WriteProjFile(pf) |
| 211 |
|
| 212 |
file = open(filename) |
| 213 |
written_contents = file.read() |
| 214 |
file.close() |
| 215 |
self.compare_xml(written_contents, expected) |
| 216 |
|
| 217 |
def doTestRead(self, data, input): |
| 218 |
|
| 219 |
filename = self.temp_file_name("projfile.proj") |
| 220 |
file = open(filename, "w") |
| 221 |
file.write(input) |
| 222 |
file.close() |
| 223 |
|
| 224 |
pf = resource.ReadProjFile(filename) |
| 225 |
|
| 226 |
eq = self.assertEquals |
| 227 |
|
| 228 |
eq(pf.GetFilename(), filename) |
| 229 |
|
| 230 |
for proj, d in zip(pf.GetProjections(), data): |
| 231 |
eq(proj.GetName(), d[0]) |
| 232 |
for param in proj.GetAllParameters(): |
| 233 |
self.assert_(param in d[1]) |
| 234 |
|
| 235 |
|
| 236 |
if __name__ == "__main__": |
| 237 |
unittest.main() |
Parent Directory
| 
Revision Log