| 1 |
# Copyright (c) 2002, 2003 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 xmlsupport |
| 20 |
import support |
| 21 |
support.initthuban() |
| 22 |
|
| 23 |
from Thuban import _ |
| 24 |
from Thuban.Model.proj import Projection, ProjFile, \ |
| 25 |
PROJ_UNITS_METERS, PROJ_UNITS_DEGREES |
| 26 |
|
| 27 |
import Thuban.Model.resource as resource |
| 28 |
|
| 29 |
from xmlsupport import sax_eventlist |
| 30 |
|
| 31 |
from xml.sax import SAXParseException |
| 32 |
|
| 33 |
|
| 34 |
class TestProjection(unittest.TestCase, support.FloatComparisonMixin): |
| 35 |
|
| 36 |
"""Test cases for the Thuban-specific Projection class |
| 37 |
""" |
| 38 |
|
| 39 |
def test(self): |
| 40 |
"""Test Projection""" |
| 41 |
params = ["zone=26", "proj=utm", "ellps=clrk66"] |
| 42 |
proj = Projection(params) |
| 43 |
self.assertEquals(proj.params, params) |
| 44 |
|
| 45 |
# It's not clear whether this value is really the correct one |
| 46 |
# but a test failure here probably still means a bug somewhere |
| 47 |
self.assertFloatSeqEqual(proj.Forward(0, 0), |
| 48 |
[3623101.8103431347, 0.0], |
| 49 |
epsilon = 1e-5) |
| 50 |
self.assertFloatSeqEqual(proj.Inverse(3623101.8103431347, 0.0), |
| 51 |
[-0.00065775699878736467, 0]) |
| 52 |
|
| 53 |
self.assertFloatSeqEqual(proj.ForwardBBox((0, 0, 2, 2)), |
| 54 |
(3620891.3077618643, 0.0, |
| 55 |
3875381.8535437919, 252962.10480170773), |
| 56 |
epsilon = 1e-5) |
| 57 |
|
| 58 |
# GetName() |
| 59 |
self.assertEquals(proj.GetName(), _("Unknown")) |
| 60 |
|
| 61 |
# GetParameter() |
| 62 |
self.assertEquals(proj.GetParameter("zone"), "26") |
| 63 |
self.assertEquals(proj.GetParameter("proj"), "utm") |
| 64 |
self.assertEquals(proj.GetParameter("ellps"), "clrk66") |
| 65 |
self.assertEquals(proj.GetParameter("hallo"), "") |
| 66 |
|
| 67 |
# GetAllParameters() |
| 68 |
self.assertEquals(proj.GetAllParameters(), params) |
| 69 |
|
| 70 |
# GetName() |
| 71 |
proj = Projection(params, "MyName") |
| 72 |
self.assertEquals(proj.GetName(), "MyName") |
| 73 |
|
| 74 |
def test_get_parameter_without_equals_sign(self): |
| 75 |
"""Test Projection.GetParameter() for a parameter without '=' sign""" |
| 76 |
proj = Projection(["proj=utm", "zone=34", "south", "ellps=clrk66"]) |
| 77 |
# The Projection class pretends that for parameters specified |
| 78 |
# without a value the value is the same as the parameter name. |
| 79 |
self.assertEquals(proj.GetParameter("south"), "south") |
| 80 |
|
| 81 |
def test_get_projection_units_geo(self): |
| 82 |
"""Test Projection.GetProjectedUnits() for geographic projection""" |
| 83 |
proj = Projection(["proj=latlong", "to_meter=0.017453292519943295", |
| 84 |
"ellps=clrk66"]) |
| 85 |
self.assertEquals(proj.GetProjectedUnits(), PROJ_UNITS_DEGREES) |
| 86 |
|
| 87 |
def test_get_projection_units_normal(self): |
| 88 |
"""Test Projection.GetProjectedUnits() for normal projection""" |
| 89 |
proj = Projection(["zone=26", "proj=utm", "ellps=clrk66"]) |
| 90 |
self.assertEquals(proj.GetProjectedUnits(), PROJ_UNITS_METERS) |
| 91 |
|
| 92 |
def test_label(self): |
| 93 |
"""Test Projection.Label() without epsg""" |
| 94 |
proj = Projection(["zone=26", "proj=utm", "ellps=clrk66"], |
| 95 |
name = "My Projection") |
| 96 |
self.assertEquals(proj.Label(), "My Projection") |
| 97 |
|
| 98 |
def test_label_epsg(self): |
| 99 |
"""Test Projection.Label() with epsg""" |
| 100 |
proj = Projection(["zone=26", "proj=utm", "ellps=clrk66"], |
| 101 |
name = "My Projection", epsg="42") |
| 102 |
self.assertEquals(proj.Label(), "EPSG 42 My Projection") |
| 103 |
|
| 104 |
def test_epsgcode_for_non_epsg_projection(self): |
| 105 |
"""Test Projection.EPSGCode() without epsg""" |
| 106 |
proj = Projection(["zone=26", "proj=utm", "ellps=clrk66"], |
| 107 |
name = "My Projection") |
| 108 |
self.assertEquals(proj.EPSGCode(), None) |
| 109 |
|
| 110 |
def test_epsgcode_for_real_epsg_projection(self): |
| 111 |
"""Test Projection.EPSGCode() with epsg""" |
| 112 |
proj = Projection(["zone=26", "proj=utm", "ellps=clrk66"], |
| 113 |
name = "My Projection", epsg="42") |
| 114 |
self.assertEquals(proj.EPSGCode(), "42") |
| 115 |
|
| 116 |
|
| 117 |
class ProjFileTest(unittest.TestCase, support.FileTestMixin): |
| 118 |
|
| 119 |
"""Base class for the proj file tests""" |
| 120 |
|
| 121 |
def filename(self): |
| 122 |
"""Return the filename for the test""" |
| 123 |
return self.temp_file_name(self.id() + ".proj") |
| 124 |
|
| 125 |
|
| 126 |
class TestProjFile(ProjFileTest, xmlsupport.ValidationTest): |
| 127 |
|
| 128 |
"""Test cases for reading and writing projection files. |
| 129 |
""" |
| 130 |
|
| 131 |
def test(self): |
| 132 |
"""Test ProjFile""" |
| 133 |
|
| 134 |
proj0 = Projection(["proj=tmerc", "ellps=clrk66"]) |
| 135 |
proj1 = Projection(["proj=utm", "ellps=clrk66"]) |
| 136 |
proj2 = Projection(["proj=lcc", "ellps=clrk66", |
| 137 |
"lat_1=0", "lat_2=20"]) |
| 138 |
|
| 139 |
eq = self.assertEquals |
| 140 |
|
| 141 |
|
| 142 |
# |
| 143 |
# __init__() |
| 144 |
# GetFilename() |
| 145 |
# SetFilename() |
| 146 |
# |
| 147 |
for name in ["", "hello_world"]: |
| 148 |
projFile = ProjFile(name) |
| 149 |
eq(projFile.GetFilename(), name) |
| 150 |
|
| 151 |
projFile.SetFilename("XXX") |
| 152 |
projFile.SetFilename(name) |
| 153 |
eq(projFile.GetFilename(), name) |
| 154 |
|
| 155 |
# initial number of projections should be 0 |
| 156 |
eq(len(projFile.GetProjections()), 0) |
| 157 |
|
| 158 |
# |
| 159 |
# Add() |
| 160 |
# Remove() |
| 161 |
# |
| 162 |
projFile.Add(proj0) |
| 163 |
eq(len(projFile.GetProjections()), 1) |
| 164 |
projFile.Remove(proj0) |
| 165 |
eq(len(projFile.GetProjections()), 0) |
| 166 |
|
| 167 |
# try to remove something that doesn't exist |
| 168 |
self.assertRaises(ValueError, projFile.Remove, None) |
| 169 |
self.assertRaises(ValueError, projFile.Remove, proj0) |
| 170 |
|
| 171 |
projFile.Add(proj0) |
| 172 |
projFile.Add(proj1) |
| 173 |
projFile.Add(proj2) |
| 174 |
eq(len(projFile.GetProjections()), 3) |
| 175 |
|
| 176 |
# GetProjections() -- tests order |
| 177 |
projs = projFile.GetProjections() |
| 178 |
eq(projs[0], proj0) |
| 179 |
eq(projs[1], proj1) |
| 180 |
eq(projs[2], proj2) |
| 181 |
|
| 182 |
projFile.Remove(proj2) |
| 183 |
projFile.Remove(proj1) |
| 184 |
|
| 185 |
# Replace() |
| 186 |
projFile.Replace(proj0, proj1) |
| 187 |
projs = projFile.GetProjections() |
| 188 |
eq(projs[0], proj1) |
| 189 |
|
| 190 |
# replace a non-existent projection |
| 191 |
self.assertRaises(ValueError, projFile.Replace, None, proj2) |
| 192 |
self.assertRaises(ValueError, projFile.Replace, proj0, proj2) |
| 193 |
|
| 194 |
def test_read_non_existing_file(self): |
| 195 |
"""Test read_proj_file with non-existing file""" |
| 196 |
self.assertRaises(IOError, |
| 197 |
resource.read_proj_file, |
| 198 |
self.temp_file_name("nonexistent.proj")) |
| 199 |
|
| 200 |
def test_read_unreadable_file(self): |
| 201 |
"""Test read_proj_file with unreadable file |
| 202 |
|
| 203 |
As currently written this only works on unix-like systems and |
| 204 |
not e.g. on MS Windows. |
| 205 |
""" |
| 206 |
filename = self.filename() |
| 207 |
file = open(filename, "w") |
| 208 |
file.close() |
| 209 |
os.chmod(filename, 0200) # write-only |
| 210 |
self.assertRaises(IOError, resource.read_proj_file, filename) |
| 211 |
|
| 212 |
def test_read_empty_file(self): |
| 213 |
"""Test read_proj_file with empty file""" |
| 214 |
filename = self.filename() |
| 215 |
file = open(filename, "w") |
| 216 |
file.close() |
| 217 |
|
| 218 |
self.assertRaises(SAXParseException, resource.read_proj_file, filename) |
| 219 |
|
| 220 |
def test_get_system_proj_file(self): |
| 221 |
"""Test resource.get_system_proj_file() |
| 222 |
|
| 223 |
This is primarily to test whether the system proj file contains |
| 224 |
invalid projection paramers and whether the proj file is not |
| 225 |
empty |
| 226 |
""" |
| 227 |
projfile, warnings = resource.get_system_proj_file() |
| 228 |
self.assertEquals(warnings, []) |
| 229 |
self.assert_(len(projfile.GetProjections()) > 0) |
| 230 |
|
| 231 |
|
| 232 |
class WriteProjFileTests(ProjFileTest, xmlsupport.ValidationTest): |
| 233 |
|
| 234 |
"""Test cases for writing proj files""" |
| 235 |
|
| 236 |
def compare_xml(self, xml1, xml2): |
| 237 |
self.assertEquals(sax_eventlist(xml1), sax_eventlist(xml2)) |
| 238 |
|
| 239 |
def doTestWrite(self, projfile, expected): |
| 240 |
filename = self.filename() |
| 241 |
|
| 242 |
resource.write_proj_file(projfile) |
| 243 |
|
| 244 |
file = open(filename) |
| 245 |
written_contents = file.read() |
| 246 |
file.close() |
| 247 |
self.compare_xml(written_contents, expected) |
| 248 |
self.validate_data(written_contents) |
| 249 |
self.validate_data(expected) |
| 250 |
|
| 251 |
def test_write(self): |
| 252 |
"""Test write_proj_file""" |
| 253 |
pf = ProjFile(self.filename()) |
| 254 |
pf.Add(Projection(['proj=tmerc', 'ellps=clrk66', |
| 255 |
'lat_0=90w', 'lon_0=90w', 'k=1'], |
| 256 |
"Transverse Mercator",)) |
| 257 |
pf.Add(Projection(["proj=tmerc", |
| 258 |
"lat_0=0.000000000", "lon_0=-62.000000000", |
| 259 |
"k=0.999500", "x_0=400000.000", "y_0=0.000", |
| 260 |
"ellps=clrk80", "units=m"], |
| 261 |
"Anguilla 1957 / British West Indies Grid", |
| 262 |
epsg="200")) |
| 263 |
file_contents = '''<?xml version="1.0" encoding="UTF-8"?> |
| 264 |
<!DOCTYPE projectionlist SYSTEM "projfile.dtd"> |
| 265 |
<projectionlist> |
| 266 |
<projection name="Transverse Mercator"> |
| 267 |
<parameter value="proj=tmerc"/> |
| 268 |
<parameter value="ellps=clrk66"/> |
| 269 |
<parameter value="lat_0=90w"/> |
| 270 |
<parameter value="lon_0=90w"/> |
| 271 |
<parameter value="k=1"/> |
| 272 |
</projection> |
| 273 |
<projection epsg="200" |
| 274 |
name="Anguilla 1957 / British West Indies Grid"> |
| 275 |
<parameter value="proj=tmerc"/> |
| 276 |
<parameter value="lat_0=0.000000000"/> |
| 277 |
<parameter value="lon_0=-62.000000000"/> |
| 278 |
<parameter value="k=0.999500"/> |
| 279 |
<parameter value="x_0=400000.000"/> |
| 280 |
<parameter value="y_0=0.000"/> |
| 281 |
<parameter value="ellps=clrk80"/> |
| 282 |
<parameter value="units=m"/> |
| 283 |
</projection> |
| 284 |
</projectionlist> |
| 285 |
''' |
| 286 |
self.doTestWrite(pf, file_contents) |
| 287 |
|
| 288 |
def test_write_empty_file(self): |
| 289 |
"""Test write empty ProjFile""" |
| 290 |
pf = ProjFile(self.filename()) |
| 291 |
file_contents = '''<?xml version="1.0" encoding="UTF-8"?> |
| 292 |
<!DOCTYPE projectionlist SYSTEM "projfile.dtd"> |
| 293 |
<projectionlist> |
| 294 |
</projectionlist> |
| 295 |
''' |
| 296 |
self.doTestWrite(pf, file_contents) |
| 297 |
|
| 298 |
|
| 299 |
class TestLoadingProjFile(support.FileLoadTestCase): |
| 300 |
|
| 301 |
file_extension = ".proj" |
| 302 |
file_contents = '''\ |
| 303 |
<?xml version="1.0" encoding="UTF-8"?> |
| 304 |
<!DOCTYPE projectionlist SYSTEM "projfile.dtd"> |
| 305 |
<projectionlist> |
| 306 |
<projection name="Transverse Mercator"> |
| 307 |
<parameter value="proj=tmerc"/> |
| 308 |
<parameter value="ellps=clrk66"/> |
| 309 |
<parameter value="lat_0=90w"/> |
| 310 |
<parameter value="lon_0=90w"/> |
| 311 |
<parameter value="k=1"/> |
| 312 |
</projection> |
| 313 |
<projection epsg="200" name="Anguilla 1957 / British West Indies Grid"> |
| 314 |
<parameter value="proj=tmerc"/> |
| 315 |
<parameter value="lat_0=0.000000000"/> |
| 316 |
<parameter value="lon_0=-62.000000000"/> |
| 317 |
<parameter value="k=0.999500"/> |
| 318 |
<parameter value="x_0=400000.000"/> |
| 319 |
<parameter value="y_0=0.000"/> |
| 320 |
<parameter value="ellps=clrk80"/> |
| 321 |
<parameter value="units=m"/> |
| 322 |
</projection> |
| 323 |
</projectionlist> |
| 324 |
''' |
| 325 |
|
| 326 |
def check_projection(self, proj, label, parameters): |
| 327 |
"""Check the values of the proj's label and parameters""" |
| 328 |
self.assertEquals(proj.Label(), label) |
| 329 |
params = proj.GetAllParameters()[:] |
| 330 |
params.sort() |
| 331 |
self.assertEquals(params, parameters) |
| 332 |
|
| 333 |
def test(self): |
| 334 |
projfile, warnings = resource.read_proj_file(self.filename()) |
| 335 |
# no warnings |
| 336 |
self.assertEquals(warnings, []) |
| 337 |
|
| 338 |
# There are two projections |
| 339 |
projs = projfile.GetProjections() |
| 340 |
self.assertEquals(len(projs), 2) |
| 341 |
|
| 342 |
self.check_projection(projs[0], |
| 343 |
"Transverse Mercator", |
| 344 |
['ellps=clrk66', 'k=1', 'lat_0=90w', 'lon_0=90w', |
| 345 |
'proj=tmerc']) |
| 346 |
self.check_projection(projs[1], |
| 347 |
"EPSG 200 Anguilla 1957 / British West Indies Grid", |
| 348 |
["ellps=clrk80", "k=0.999500", |
| 349 |
"lat_0=0.000000000", "lon_0=-62.000000000", |
| 350 |
"proj=tmerc", "units=m", |
| 351 |
"x_0=400000.000", "y_0=0.000"]) |
| 352 |
|
| 353 |
|
| 354 |
class TestLoadingProjFileWithEmptyProjectionlist(support.FileLoadTestCase): |
| 355 |
|
| 356 |
file_extension = ".proj" |
| 357 |
file_contents = '''\ |
| 358 |
<?xml version="1.0" encoding="UTF-8"?> |
| 359 |
<!DOCTYPE projectionlist SYSTEM "projfile.dtd"> |
| 360 |
<projectionlist> |
| 361 |
</projectionlist> |
| 362 |
''' |
| 363 |
|
| 364 |
def test(self): |
| 365 |
projfile, warnings = resource.read_proj_file(self.filename()) |
| 366 |
# no warnings |
| 367 |
self.assertEquals(warnings, []) |
| 368 |
|
| 369 |
# There are no projections |
| 370 |
self.assertEquals(len(projfile.GetProjections()), 0) |
| 371 |
|
| 372 |
|
| 373 |
class TestProjFileWithInvalidParameters(unittest.TestCase, |
| 374 |
support.FileLoadTestCase): |
| 375 |
|
| 376 |
file_extension = ".proj" |
| 377 |
file_contents = '''\ |
| 378 |
<?xml version="1.0" encoding="UTF-8"?> |
| 379 |
<!DOCTYPE projectionlist SYSTEM "projfile.dtd"> |
| 380 |
<projectionlist> |
| 381 |
<projection name="Universal Transverse Mercator"> |
| 382 |
<parameter value="proj=utm"/> |
| 383 |
<parameter value="ellps=clrk66"/> |
| 384 |
<!-- an invalid zone number to trigger the parameter checking |
| 385 |
in the proj library --> |
| 386 |
<parameter value="zone=1000"/> |
| 387 |
</projection> |
| 388 |
<projection name="Transverse Mercator"> |
| 389 |
<parameter value="proj=tmerc"/> |
| 390 |
<parameter value="ellps=clrk66"/> |
| 391 |
<parameter value="lat_0=90w"/> |
| 392 |
<parameter value="lon_0=90w"/> |
| 393 |
<parameter value="k=1"/> |
| 394 |
</projection> |
| 395 |
</projectionlist> |
| 396 |
''' |
| 397 |
|
| 398 |
def setUp(self): |
| 399 |
support.FileLoadTestCase.setUp(self) |
| 400 |
|
| 401 |
def test(self): |
| 402 |
"""Test reading a proj file with invalid parameters""" |
| 403 |
projfile, warnings = resource.read_proj_file(self.filename()) |
| 404 |
projs = projfile.GetProjections() |
| 405 |
self.assertEquals(len(projs), 1) |
| 406 |
params = projs[0].GetAllParameters()[:] |
| 407 |
params.sort() |
| 408 |
self.assertEquals(params, ['ellps=clrk66', 'k=1', 'lat_0=90w', |
| 409 |
'lon_0=90w', 'proj=tmerc']) |
| 410 |
self.assertEquals(warnings, |
| 411 |
['Error in projection "Universal Transverse Mercator":' |
| 412 |
' invalid UTM zone number']) |
| 413 |
|
| 414 |
|
| 415 |
if __name__ == "__main__": |
| 416 |
unittest.main() |
Parent Directory
| 
Revision Log