| 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 |
from Thuban.Model.messages import PROJECTION_ADDED, PROJECTION_REMOVED, \ |
| 27 |
PROJECTION_REPLACED |
| 28 |
import Thuban.Model.resource as resource |
| 29 |
|
| 30 |
from xmlsupport import sax_eventlist |
| 31 |
|
| 32 |
from xml.sax import SAXParseException |
| 33 |
|
| 34 |
|
| 35 |
class TestProjection(unittest.TestCase, support.FloatComparisonMixin): |
| 36 |
|
| 37 |
"""Test cases for the Thuban-specific Projection class |
| 38 |
""" |
| 39 |
|
| 40 |
def test(self): |
| 41 |
"""Test Projection""" |
| 42 |
params = ["zone=26", "proj=utm", "ellps=clrk66"] |
| 43 |
proj = Projection(params) |
| 44 |
self.assertEquals(proj.params, params) |
| 45 |
|
| 46 |
# It's not clear whether this value is really the correct one |
| 47 |
# but a test failure here probably still means a bug somewhere |
| 48 |
self.assertFloatSeqEqual(proj.Forward(0, 0), |
| 49 |
[3623101.8103431347, 0.0], |
| 50 |
epsilon = 1e-5) |
| 51 |
self.assertFloatSeqEqual(proj.Inverse(3623101.8103431347, 0.0), |
| 52 |
[-0.00065775699878736467, 0]) |
| 53 |
|
| 54 |
self.assertFloatSeqEqual(proj.ForwardBBox((0, 0, 2, 2)), |
| 55 |
(3620891.3077618643, 0.0, |
| 56 |
3875381.8535437919, 252962.10480170773), |
| 57 |
epsilon = 1e-5) |
| 58 |
|
| 59 |
# GetName() |
| 60 |
self.assertEquals(proj.GetName(), _("Unknown")) |
| 61 |
|
| 62 |
# GetParameter() |
| 63 |
self.assertEquals(proj.GetParameter("zone"), "26") |
| 64 |
self.assertEquals(proj.GetParameter("proj"), "utm") |
| 65 |
self.assertEquals(proj.GetParameter("ellps"), "clrk66") |
| 66 |
self.assertEquals(proj.GetParameter("hallo"), "") |
| 67 |
|
| 68 |
# GetAllParameters() |
| 69 |
self.assertEquals(proj.GetAllParameters(), params) |
| 70 |
|
| 71 |
# GetName() |
| 72 |
proj = Projection(params, "MyName") |
| 73 |
self.assertEquals(proj.GetName(), "MyName") |
| 74 |
|
| 75 |
def test_get_parameter_without_equals_sign(self): |
| 76 |
"""Test Projection.GetParameter() for a parameter without '=' sign""" |
| 77 |
proj = Projection(["proj=utm", "zone=34", "south", "ellps=clrk66"]) |
| 78 |
# The Projection class pretends that for parameters specified |
| 79 |
# without a value the value is the same as the parameter name. |
| 80 |
self.assertEquals(proj.GetParameter("south"), "south") |
| 81 |
|
| 82 |
def test_get_projection_units_geo(self): |
| 83 |
"""Test Projection.GetProjectedUnits() for geographic projection. |
| 84 |
Test for the alias 'longlat' as well. |
| 85 |
""" |
| 86 |
proj = Projection(["proj=latlong", "to_meter=0.017453292519943295", |
| 87 |
"ellps=clrk66"]) |
| 88 |
self.assertEquals(proj.GetProjectedUnits(), PROJ_UNITS_DEGREES) |
| 89 |
proj = Projection(["proj=longlat", "to_meter=0.017453292519943295", |
| 90 |
"ellps=clrk66"]) |
| 91 |
self.assertEquals(proj.GetProjectedUnits(), PROJ_UNITS_DEGREES) |
| 92 |
|
| 93 |
def test_get_projection_units_normal(self): |
| 94 |
"""Test Projection.GetProjectedUnits() for normal projection""" |
| 95 |
proj = Projection(["zone=26", "proj=utm", "ellps=clrk66"]) |
| 96 |
self.assertEquals(proj.GetProjectedUnits(), PROJ_UNITS_METERS) |
| 97 |
|
| 98 |
def test_label(self): |
| 99 |
"""Test Projection.Label() without epsg""" |
| 100 |
proj = Projection(["zone=26", "proj=utm", "ellps=clrk66"], |
| 101 |
name = "My Projection") |
| 102 |
self.assertEquals(proj.Label(), "My Projection") |
| 103 |
|
| 104 |
def test_label_epsg(self): |
| 105 |
"""Test Projection.Label() with epsg""" |
| 106 |
proj = Projection(["zone=26", "proj=utm", "ellps=clrk66"], |
| 107 |
name = "My Projection", epsg="42") |
| 108 |
self.assertEquals(proj.Label(), "EPSG 42 My Projection") |
| 109 |
|
| 110 |
def test_epsgcode_for_non_epsg_projection(self): |
| 111 |
"""Test Projection.EPSGCode() without epsg""" |
| 112 |
proj = Projection(["zone=26", "proj=utm", "ellps=clrk66"], |
| 113 |
name = "My Projection") |
| 114 |
self.assertEquals(proj.EPSGCode(), None) |
| 115 |
|
| 116 |
def test_epsgcode_for_real_epsg_projection(self): |
| 117 |
"""Test Projection.EPSGCode() with epsg""" |
| 118 |
proj = Projection(["zone=26", "proj=utm", "ellps=clrk66"], |
| 119 |
name = "My Projection", epsg="42") |
| 120 |
self.assertEquals(proj.EPSGCode(), "42") |
| 121 |
|
| 122 |
|
| 123 |
|
| 124 |
class TestProjFileSimple: |
| 125 |
|
| 126 |
def test_init(self): |
| 127 |
"""Test ProjFile coinstructor""" |
| 128 |
proj_file = ProjFile("some_filename") |
| 129 |
self.assertEquals(proj_file.GetFilename(), "some_filename") |
| 130 |
self.assertEquals(len(proj_file.GetProjections()), 0) |
| 131 |
|
| 132 |
def test_set_filename(self): |
| 133 |
"""Test ProjFile.SetFilename()""" |
| 134 |
proj_file = ProjFile("some_filename") |
| 135 |
proj.SetFilename("other_name") |
| 136 |
self.assertEquals(proj_file.GetFilename(), "other_name") |
| 137 |
|
| 138 |
|
| 139 |
class TestProjFile(unittest.TestCase, support.SubscriberMixin): |
| 140 |
|
| 141 |
"""Test cases for ProjFile objects""" |
| 142 |
|
| 143 |
def setUp(self): |
| 144 |
self.clear_messages() |
| 145 |
self.proj0 = Projection(["proj=tmerc", "ellps=clrk66"]) |
| 146 |
self.proj1 = Projection(["proj=utm", "ellps=clrk66"]) |
| 147 |
self.proj2 = Projection(["proj=lcc", "ellps=clrk66", |
| 148 |
"lat_1=0", "lat_2=20"]) |
| 149 |
self.proj_file = ProjFile("some_filename") |
| 150 |
for msg in [PROJECTION_ADDED, PROJECTION_REMOVED, PROJECTION_REPLACED]: |
| 151 |
self.proj_file.Subscribe(msg, self.subscribe_with_params, msg) |
| 152 |
|
| 153 |
def tearDown(self): |
| 154 |
self.clear_messages() |
| 155 |
self.proj_file.Destroy() |
| 156 |
|
| 157 |
def test_add_remove(self): |
| 158 |
"""Test ProjFile.Add() and ProjFile.Remove()""" |
| 159 |
self.proj_file.Add(self.proj0) |
| 160 |
self.proj_file.Add(self.proj1) |
| 161 |
self.assertEquals(self.proj_file.GetProjections(), |
| 162 |
[self.proj0, self.proj1]) |
| 163 |
self.check_messages([(self.proj0, PROJECTION_ADDED), |
| 164 |
(self.proj1, PROJECTION_ADDED)]) |
| 165 |
self.clear_messages() |
| 166 |
|
| 167 |
self.proj_file.Remove(self.proj0) |
| 168 |
self.assertEquals(self.proj_file.GetProjections(), [self.proj1]) |
| 169 |
self.check_messages([(self.proj0, PROJECTION_REMOVED)]) |
| 170 |
|
| 171 |
def test_remove_non_existing(self): |
| 172 |
"""Test ProjFile.Remove(<proj not in projfile>)""" |
| 173 |
self.assertRaises(ValueError, self.proj_file.Remove, self.proj0) |
| 174 |
# Nothing happened, so no messages should have been sent |
| 175 |
self.check_messages([]) |
| 176 |
|
| 177 |
def test_replace(self): |
| 178 |
"""Test ProjFile.Replace()""" |
| 179 |
self.proj_file.Add(self.proj0) |
| 180 |
self.proj_file.Add(self.proj1) |
| 181 |
self.clear_messages() |
| 182 |
|
| 183 |
# Replace() |
| 184 |
self.proj_file.Replace(self.proj0, self.proj2) |
| 185 |
self.assertEquals(self.proj_file.GetProjections(), |
| 186 |
[self.proj2, self.proj1]) |
| 187 |
self.check_messages([(self.proj0, self.proj2, PROJECTION_REPLACED)]) |
| 188 |
|
| 189 |
def test_replace_non_existing(self): |
| 190 |
"""Test ProjFile.Replace(<proj not in projfile>, <some proj>)""" |
| 191 |
self.proj_file.Add(self.proj0) |
| 192 |
self.proj_file.Add(self.proj1) |
| 193 |
self.clear_messages() |
| 194 |
self.assertRaises(ValueError, |
| 195 |
self.proj_file.Replace, self.proj2, self.proj0) |
| 196 |
# All projections should still be there |
| 197 |
self.assertEquals(self.proj_file.GetProjections(), |
| 198 |
[self.proj0, self.proj1]) |
| 199 |
# Nothing happened, so no messages should have been sent |
| 200 |
self.check_messages([]) |
| 201 |
|
| 202 |
|
| 203 |
class ProjFileTest(unittest.TestCase, support.FileTestMixin, |
| 204 |
xmlsupport.ValidationTest): |
| 205 |
|
| 206 |
"""Base class for the proj file tests that read or write files""" |
| 207 |
|
| 208 |
def filename(self): |
| 209 |
"""Return the filename for the test""" |
| 210 |
return self.temp_file_name(self.id() + ".proj") |
| 211 |
|
| 212 |
|
| 213 |
class ProjFileReadTests(ProjFileTest): |
| 214 |
|
| 215 |
"""Test read ProjFile objects from files |
| 216 |
|
| 217 |
The files only cover error handling and the system projection file. |
| 218 |
""" |
| 219 |
|
| 220 |
def test_read_non_existing_file(self): |
| 221 |
"""Test read_proj_file with non-existing file""" |
| 222 |
self.assertRaises(IOError, |
| 223 |
resource.read_proj_file, |
| 224 |
self.temp_file_name("nonexistent.proj")) |
| 225 |
|
| 226 |
def test_read_unreadable_file(self): |
| 227 |
"""Test read_proj_file with unreadable file |
| 228 |
|
| 229 |
As currently written this only works on unix-like systems and |
| 230 |
not e.g. on MS Windows. |
| 231 |
""" |
| 232 |
filename = self.filename() |
| 233 |
file = open(filename, "w") |
| 234 |
file.close() |
| 235 |
os.chmod(filename, 0200) # write-only |
| 236 |
self.assertRaises(IOError, resource.read_proj_file, filename) |
| 237 |
|
| 238 |
def test_read_empty_file(self): |
| 239 |
"""Test read_proj_file with empty file""" |
| 240 |
filename = self.filename() |
| 241 |
file = open(filename, "w") |
| 242 |
file.close() |
| 243 |
|
| 244 |
self.assertRaises(SAXParseException, resource.read_proj_file, filename) |
| 245 |
|
| 246 |
def test_get_system_proj_file(self): |
| 247 |
"""Test resource.get_system_proj_file() |
| 248 |
|
| 249 |
This is primarily to test whether the system proj file contains |
| 250 |
invalid projection paramers and whether the proj file is not |
| 251 |
empty |
| 252 |
""" |
| 253 |
projfile, warnings = resource.get_system_proj_file() |
| 254 |
self.assertEquals(warnings, []) |
| 255 |
self.assert_(len(projfile.GetProjections()) > 0) |
| 256 |
|
| 257 |
# see whether it got cached and we get the same projfile object |
| 258 |
# when we read the file again |
| 259 |
projfile2, warnings = resource.get_system_proj_file() |
| 260 |
self.assert_(projfile is projfile2) |
| 261 |
|
| 262 |
|
| 263 |
class WriteProjFileTests(ProjFileTest): |
| 264 |
|
| 265 |
"""Test cases for writing proj files""" |
| 266 |
|
| 267 |
def compare_xml(self, xml1, xml2): |
| 268 |
self.assertEquals(sax_eventlist(xml1), sax_eventlist(xml2)) |
| 269 |
|
| 270 |
def doTestWrite(self, projfile, expected): |
| 271 |
filename = self.filename() |
| 272 |
|
| 273 |
resource.write_proj_file(projfile) |
| 274 |
|
| 275 |
file = open(filename) |
| 276 |
written_contents = file.read() |
| 277 |
file.close() |
| 278 |
self.compare_xml(written_contents, expected) |
| 279 |
self.validate_data(written_contents) |
| 280 |
self.validate_data(expected) |
| 281 |
|
| 282 |
def test_write(self): |
| 283 |
"""Test write_proj_file""" |
| 284 |
pf = ProjFile(self.filename()) |
| 285 |
pf.Add(Projection(['proj=tmerc', 'ellps=clrk66', |
| 286 |
'lat_0=90w', 'lon_0=90w', 'k=1'], |
| 287 |
"Transverse Mercator",)) |
| 288 |
pf.Add(Projection(["proj=tmerc", |
| 289 |
"lat_0=0.000000000", "lon_0=-62.000000000", |
| 290 |
"k=0.999500", "x_0=400000.000", "y_0=0.000", |
| 291 |
"ellps=clrk80", "units=m"], |
| 292 |
"Anguilla 1957 / British West Indies Grid", |
| 293 |
epsg="200")) |
| 294 |
file_contents = '''<?xml version="1.0" encoding="UTF-8"?> |
| 295 |
<!DOCTYPE projectionlist SYSTEM "projfile.dtd"> |
| 296 |
<projectionlist> |
| 297 |
<projection name="Transverse Mercator"> |
| 298 |
<parameter value="proj=tmerc"/> |
| 299 |
<parameter value="ellps=clrk66"/> |
| 300 |
<parameter value="lat_0=90w"/> |
| 301 |
<parameter value="lon_0=90w"/> |
| 302 |
<parameter value="k=1"/> |
| 303 |
</projection> |
| 304 |
<projection epsg="200" |
| 305 |
name="Anguilla 1957 / British West Indies Grid"> |
| 306 |
<parameter value="proj=tmerc"/> |
| 307 |
<parameter value="lat_0=0.000000000"/> |
| 308 |
<parameter value="lon_0=-62.000000000"/> |
| 309 |
<parameter value="k=0.999500"/> |
| 310 |
<parameter value="x_0=400000.000"/> |
| 311 |
<parameter value="y_0=0.000"/> |
| 312 |
<parameter value="ellps=clrk80"/> |
| 313 |
<parameter value="units=m"/> |
| 314 |
</projection> |
| 315 |
</projectionlist> |
| 316 |
''' |
| 317 |
self.doTestWrite(pf, file_contents) |
| 318 |
|
| 319 |
def test_write_empty_file(self): |
| 320 |
"""Test write empty ProjFile""" |
| 321 |
pf = ProjFile(self.filename()) |
| 322 |
file_contents = '''<?xml version="1.0" encoding="UTF-8"?> |
| 323 |
<!DOCTYPE projectionlist SYSTEM "projfile.dtd"> |
| 324 |
<projectionlist> |
| 325 |
</projectionlist> |
| 326 |
''' |
| 327 |
self.doTestWrite(pf, file_contents) |
| 328 |
|
| 329 |
|
| 330 |
class ProjFileLoadTestCase(support.FileLoadTestCase): |
| 331 |
|
| 332 |
"""Base class for the test cases that read specific test files""" |
| 333 |
|
| 334 |
file_extension = ".proj" |
| 335 |
|
| 336 |
def tearDown(self): |
| 337 |
"""Clear the cache explicitly""" |
| 338 |
resource.clear_proj_file_cache() |
| 339 |
|
| 340 |
|
| 341 |
class TestLoadingProjFile(ProjFileLoadTestCase): |
| 342 |
|
| 343 |
file_contents = '''\ |
| 344 |
<?xml version="1.0" encoding="UTF-8"?> |
| 345 |
<!DOCTYPE projectionlist SYSTEM "projfile.dtd"> |
| 346 |
<projectionlist> |
| 347 |
<projection name="Transverse Mercator"> |
| 348 |
<parameter value="proj=tmerc"/> |
| 349 |
<parameter value="ellps=clrk66"/> |
| 350 |
<parameter value="lat_0=90w"/> |
| 351 |
<parameter value="lon_0=90w"/> |
| 352 |
<parameter value="k=1"/> |
| 353 |
</projection> |
| 354 |
<projection epsg="200" name="Anguilla 1957 / British West Indies Grid"> |
| 355 |
<parameter value="proj=tmerc"/> |
| 356 |
<parameter value="lat_0=0.000000000"/> |
| 357 |
<parameter value="lon_0=-62.000000000"/> |
| 358 |
<parameter value="k=0.999500"/> |
| 359 |
<parameter value="x_0=400000.000"/> |
| 360 |
<parameter value="y_0=0.000"/> |
| 361 |
<parameter value="ellps=clrk80"/> |
| 362 |
<parameter value="units=m"/> |
| 363 |
</projection> |
| 364 |
</projectionlist> |
| 365 |
''' |
| 366 |
|
| 367 |
def check_projection(self, proj, label, parameters): |
| 368 |
"""Check the values of the proj's label and parameters""" |
| 369 |
self.assertEquals(proj.Label(), label) |
| 370 |
params = proj.GetAllParameters()[:] |
| 371 |
params.sort() |
| 372 |
self.assertEquals(params, parameters) |
| 373 |
|
| 374 |
def test(self): |
| 375 |
projfile, warnings = resource.read_proj_file(self.filename()) |
| 376 |
# no warnings |
| 377 |
self.assertEquals(warnings, []) |
| 378 |
|
| 379 |
# There are two projections |
| 380 |
projs = projfile.GetProjections() |
| 381 |
self.assertEquals(len(projs), 2) |
| 382 |
|
| 383 |
self.check_projection(projs[0], |
| 384 |
"Transverse Mercator", |
| 385 |
['ellps=clrk66', 'k=1', 'lat_0=90w', 'lon_0=90w', |
| 386 |
'proj=tmerc']) |
| 387 |
self.check_projection(projs[1], |
| 388 |
"EPSG 200 Anguilla 1957 / British West Indies Grid", |
| 389 |
["ellps=clrk80", "k=0.999500", |
| 390 |
"lat_0=0.000000000", "lon_0=-62.000000000", |
| 391 |
"proj=tmerc", "units=m", |
| 392 |
"x_0=400000.000", "y_0=0.000"]) |
| 393 |
|
| 394 |
def test_caching(self): |
| 395 |
# test whether the projfile cache works |
| 396 |
projfile, warnings = resource.read_proj_file(self.filename()) |
| 397 |
projfile2, warnings = resource.read_proj_file(self.filename()) |
| 398 |
|
| 399 |
# Both projfiles should be the same object |
| 400 |
self.assert_(projfile2 is projfile) |
| 401 |
|
| 402 |
# If we clear the cache we should get a new one. |
| 403 |
resource.clear_proj_file_cache() |
| 404 |
projfile3, warnings = resource.read_proj_file(self.filename()) |
| 405 |
self.assert_(projfile3 is not projfile) |
| 406 |
|
| 407 |
|
| 408 |
class TestLoadingProjFileWithEmptyProjectionlist(ProjFileLoadTestCase): |
| 409 |
|
| 410 |
file_contents = '''\ |
| 411 |
<?xml version="1.0" encoding="UTF-8"?> |
| 412 |
<!DOCTYPE projectionlist SYSTEM "projfile.dtd"> |
| 413 |
<projectionlist> |
| 414 |
</projectionlist> |
| 415 |
''' |
| 416 |
|
| 417 |
def test(self): |
| 418 |
projfile, warnings = resource.read_proj_file(self.filename()) |
| 419 |
# no warnings |
| 420 |
self.assertEquals(warnings, []) |
| 421 |
|
| 422 |
# There are no projections |
| 423 |
self.assertEquals(len(projfile.GetProjections()), 0) |
| 424 |
|
| 425 |
|
| 426 |
class TestProjFileWithInvalidParameters(ProjFileLoadTestCase): |
| 427 |
|
| 428 |
file_contents = '''\ |
| 429 |
<?xml version="1.0" encoding="UTF-8"?> |
| 430 |
<!DOCTYPE projectionlist SYSTEM "projfile.dtd"> |
| 431 |
<projectionlist> |
| 432 |
<projection name="Universal Transverse Mercator"> |
| 433 |
<parameter value="proj=utm"/> |
| 434 |
<parameter value="ellps=clrk66"/> |
| 435 |
<!-- an invalid zone number to trigger the parameter checking |
| 436 |
in the proj library --> |
| 437 |
<parameter value="zone=1000"/> |
| 438 |
</projection> |
| 439 |
<projection name="Transverse Mercator"> |
| 440 |
<parameter value="proj=tmerc"/> |
| 441 |
<parameter value="ellps=clrk66"/> |
| 442 |
<parameter value="lat_0=90w"/> |
| 443 |
<parameter value="lon_0=90w"/> |
| 444 |
<parameter value="k=1"/> |
| 445 |
</projection> |
| 446 |
</projectionlist> |
| 447 |
''' |
| 448 |
|
| 449 |
def setUp(self): |
| 450 |
support.FileLoadTestCase.setUp(self) |
| 451 |
|
| 452 |
def test(self): |
| 453 |
"""Test reading a proj file with invalid parameters""" |
| 454 |
projfile, warnings = resource.read_proj_file(self.filename()) |
| 455 |
projs = projfile.GetProjections() |
| 456 |
self.assertEquals(len(projs), 1) |
| 457 |
params = projs[0].GetAllParameters()[:] |
| 458 |
params.sort() |
| 459 |
self.assertEquals(params, ['ellps=clrk66', 'k=1', 'lat_0=90w', |
| 460 |
'lon_0=90w', 'proj=tmerc']) |
| 461 |
self.assertEquals(warnings, |
| 462 |
['Error in projection "Universal Transverse Mercator":' |
| 463 |
' invalid UTM zone number']) |
| 464 |
|
| 465 |
|
| 466 |
if __name__ == "__main__": |
| 467 |
support.run_tests() |
Parent Directory
| 
Revision Log