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# Copyright (c) 2002, 2003 by Intevation GmbH |
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# Authors: |
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# Bernhard Herzog <[email protected]> |
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# |
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# This program is free software under the GPL (>=v2) |
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# Read the file COPYING coming with Thuban for details. |
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|
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""" |
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Test the Thuban-specific Projection class |
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""" |
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|
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__version__ = "$Revision$" |
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# $Source$ |
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# $Id$ |
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|
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import unittest |
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import os |
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|
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import xmlsupport |
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import support |
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support.initthuban() |
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|
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from Thuban import _ |
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from Thuban.Model.proj import Projection, ProjFile, \ |
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PROJ_UNITS_METERS, PROJ_UNITS_DEGREES |
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from Thuban.Model.messages import PROJECTION_ADDED, PROJECTION_REMOVED, \ |
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PROJECTION_REPLACED |
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import Thuban.Model.resource as resource |
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|
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from xmlsupport import sax_eventlist |
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|
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from xml.sax import SAXParseException |
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|
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|
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class TestProjection(unittest.TestCase, support.FloatComparisonMixin): |
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|
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"""Test cases for the Thuban-specific Projection class |
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""" |
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|
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def test(self): |
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"""Test Projection""" |
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params = ["zone=26", "proj=utm", "ellps=clrk66"] |
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proj = Projection(params) |
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self.assertEquals(proj.params, params) |
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|
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# It's not clear whether this value is really the correct one |
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# but a test failure here probably still means a bug somewhere |
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self.assertFloatSeqEqual(proj.Forward(0, 0), |
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[3623101.8103431347, 0.0], |
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epsilon = 1e-5) |
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self.assertFloatSeqEqual(proj.Inverse(3623101.8103431347, 0.0), |
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[-0.00065775699878736467, 0]) |
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|
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self.assertFloatSeqEqual(proj.ForwardBBox((0, 0, 2, 2)), |
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(3620891.3077618643, 0.0, |
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3875381.8535437919, 252962.10480170773), |
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epsilon = 1e-5) |
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|
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# GetName() |
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self.assertEquals(proj.GetName(), _("Unknown")) |
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|
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# GetParameter() |
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self.assertEquals(proj.GetParameter("zone"), "26") |
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self.assertEquals(proj.GetParameter("proj"), "utm") |
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self.assertEquals(proj.GetParameter("ellps"), "clrk66") |
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self.assertEquals(proj.GetParameter("hallo"), "") |
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|
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# GetAllParameters() |
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self.assertEquals(proj.GetAllParameters(), params) |
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|
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# GetName() |
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proj = Projection(params, "MyName") |
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self.assertEquals(proj.GetName(), "MyName") |
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|
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def test_get_parameter_without_equals_sign(self): |
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"""Test Projection.GetParameter() for a parameter without '=' sign""" |
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proj = Projection(["proj=utm", "zone=34", "south", "ellps=clrk66"]) |
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# The Projection class pretends that for parameters specified |
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# without a value the value is the same as the parameter name. |
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self.assertEquals(proj.GetParameter("south"), "south") |
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|
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def test_get_projection_units_geo(self): |
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"""Test Projection.GetProjectedUnits() for geographic projection. |
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Test for the alias 'longlat' as well. |
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""" |
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proj = Projection(["proj=latlong", "to_meter=0.017453292519943295", |
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"ellps=clrk66"]) |
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self.assertEquals(proj.GetProjectedUnits(), PROJ_UNITS_DEGREES) |
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proj = Projection(["proj=longlat", "to_meter=0.017453292519943295", |
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"ellps=clrk66"]) |
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self.assertEquals(proj.GetProjectedUnits(), PROJ_UNITS_DEGREES) |
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|
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def test_get_projection_units_normal(self): |
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"""Test Projection.GetProjectedUnits() for normal projection""" |
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proj = Projection(["zone=26", "proj=utm", "ellps=clrk66"]) |
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self.assertEquals(proj.GetProjectedUnits(), PROJ_UNITS_METERS) |
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|
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def test_label(self): |
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"""Test Projection.Label() without epsg""" |
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proj = Projection(["zone=26", "proj=utm", "ellps=clrk66"], |
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name = "My Projection") |
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self.assertEquals(proj.Label(), "My Projection") |
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|
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def test_label_epsg(self): |
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"""Test Projection.Label() with epsg""" |
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proj = Projection(["zone=26", "proj=utm", "ellps=clrk66"], |
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name = "My Projection", epsg="42") |
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self.assertEquals(proj.Label(), "EPSG 42 My Projection") |
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|
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def test_epsgcode_for_non_epsg_projection(self): |
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"""Test Projection.EPSGCode() without epsg""" |
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proj = Projection(["zone=26", "proj=utm", "ellps=clrk66"], |
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name = "My Projection") |
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self.assertEquals(proj.EPSGCode(), None) |
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|
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def test_epsgcode_for_real_epsg_projection(self): |
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"""Test Projection.EPSGCode() with epsg""" |
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proj = Projection(["zone=26", "proj=utm", "ellps=clrk66"], |
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name = "My Projection", epsg="42") |
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self.assertEquals(proj.EPSGCode(), "42") |
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|
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|
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|
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class TestProjFileSimple: |
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|
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def test_init(self): |
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"""Test ProjFile coinstructor""" |
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proj_file = ProjFile("some_filename") |
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self.assertEquals(proj_file.GetFilename(), "some_filename") |
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self.assertEquals(len(proj_file.GetProjections()), 0) |
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|
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def test_set_filename(self): |
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"""Test ProjFile.SetFilename()""" |
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proj_file = ProjFile("some_filename") |
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proj.SetFilename("other_name") |
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self.assertEquals(proj_file.GetFilename(), "other_name") |
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|
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|
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class TestProjFile(unittest.TestCase, support.SubscriberMixin): |
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|
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"""Test cases for ProjFile objects""" |
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|
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def setUp(self): |
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self.clear_messages() |
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self.proj0 = Projection(["proj=tmerc", "ellps=clrk66"]) |
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self.proj1 = Projection(["proj=utm", "ellps=clrk66"]) |
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self.proj2 = Projection(["proj=lcc", "ellps=clrk66", |
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"lat_1=0", "lat_2=20"]) |
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self.proj_file = ProjFile("some_filename") |
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for msg in [PROJECTION_ADDED, PROJECTION_REMOVED, PROJECTION_REPLACED]: |
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self.proj_file.Subscribe(msg, self.subscribe_with_params, msg) |
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|
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def tearDown(self): |
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self.clear_messages() |
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self.proj_file.Destroy() |
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|
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def test_add_remove(self): |
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"""Test ProjFile.Add() and ProjFile.Remove()""" |
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self.proj_file.Add(self.proj0) |
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self.proj_file.Add(self.proj1) |
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self.assertEquals(self.proj_file.GetProjections(), |
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[self.proj0, self.proj1]) |
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self.check_messages([(self.proj0, PROJECTION_ADDED), |
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(self.proj1, PROJECTION_ADDED)]) |
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self.clear_messages() |
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|
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self.proj_file.Remove(self.proj0) |
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self.assertEquals(self.proj_file.GetProjections(), [self.proj1]) |
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self.check_messages([(self.proj0, PROJECTION_REMOVED)]) |
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|
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def test_remove_non_existing(self): |
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"""Test ProjFile.Remove(<proj not in projfile>)""" |
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self.assertRaises(ValueError, self.proj_file.Remove, self.proj0) |
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# Nothing happened, so no messages should have been sent |
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self.check_messages([]) |
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|
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def test_replace(self): |
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"""Test ProjFile.Replace()""" |
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self.proj_file.Add(self.proj0) |
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self.proj_file.Add(self.proj1) |
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self.clear_messages() |
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|
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# Replace() |
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self.proj_file.Replace(self.proj0, self.proj2) |
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self.assertEquals(self.proj_file.GetProjections(), |
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[self.proj2, self.proj1]) |
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self.check_messages([(self.proj0, self.proj2, PROJECTION_REPLACED)]) |
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|
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def test_replace_non_existing(self): |
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"""Test ProjFile.Replace(<proj not in projfile>, <some proj>)""" |
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self.proj_file.Add(self.proj0) |
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self.proj_file.Add(self.proj1) |
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self.clear_messages() |
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self.assertRaises(ValueError, |
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self.proj_file.Replace, self.proj2, self.proj0) |
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# All projections should still be there |
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self.assertEquals(self.proj_file.GetProjections(), |
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[self.proj0, self.proj1]) |
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# Nothing happened, so no messages should have been sent |
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self.check_messages([]) |
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|
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|
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class ProjFileTest(unittest.TestCase, support.FileTestMixin, |
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xmlsupport.ValidationTest): |
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|
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"""Base class for the proj file tests that read or write files""" |
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|
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def filename(self): |
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"""Return the filename for the test""" |
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return self.temp_file_name(self.id() + ".proj") |
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|
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|
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class ProjFileReadTests(ProjFileTest): |
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|
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"""Test read ProjFile objects from files |
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|
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The files only cover error handling and the system projection file. |
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""" |
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|
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def test_read_non_existing_file(self): |
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"""Test read_proj_file with non-existing file""" |
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self.assertRaises(IOError, |
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resource.read_proj_file, |
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self.temp_file_name("nonexistent.proj")) |
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|
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def test_read_unreadable_file(self): |
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"""Test read_proj_file with unreadable file |
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|
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As currently written this only works on unix-like systems and |
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not e.g. on MS Windows. |
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""" |
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filename = self.filename() |
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file = open(filename, "w") |
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file.close() |
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os.chmod(filename, 0200) # write-only |
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self.assertRaises(IOError, resource.read_proj_file, filename) |
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|
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def test_read_empty_file(self): |
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"""Test read_proj_file with empty file""" |
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filename = self.filename() |
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file = open(filename, "w") |
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file.close() |
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|
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self.assertRaises(SAXParseException, resource.read_proj_file, filename) |
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|
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def test_get_system_proj_file(self): |
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"""Test resource.get_system_proj_file(DEFAULT_PROJ_FILE) |
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|
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This is primarily to test whether the system proj file contains |
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invalid projection paramers and whether the proj file is not |
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empty |
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""" |
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projfile, warnings\ |
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= resource.get_system_proj_file(resource.DEFAULT_PROJ_FILE) |
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self.assertEquals(warnings, []) |
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self.assert_(len(projfile.GetProjections()) > 0) |
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|
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# see whether it got cached and we get the same projfile object |
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# when we read the file again |
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projfile2, warnings \ |
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= resource.get_system_proj_file(resource.DEFAULT_PROJ_FILE) |
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self.assert_(projfile is projfile2) |
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|
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|
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class WriteProjFileTests(ProjFileTest): |
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|
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"""Test cases for writing proj files""" |
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|
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def compare_xml(self, xml1, xml2): |
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self.assertEquals(sax_eventlist(xml1), sax_eventlist(xml2)) |
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|
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def doTestWrite(self, projfile, expected): |
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filename = self.filename() |
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|
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resource.write_proj_file(projfile) |
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|
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file = open(filename) |
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written_contents = file.read() |
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file.close() |
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self.compare_xml(written_contents, expected) |
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self.validate_data(written_contents) |
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self.validate_data(expected) |
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|
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def test_write(self): |
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"""Test write_proj_file""" |
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pf = ProjFile(self.filename()) |
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pf.Add(Projection(['proj=tmerc', 'ellps=clrk66', |
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'lat_0=90w', 'lon_0=90w', 'k=1'], |
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"Transverse Mercator",)) |
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pf.Add(Projection(["proj=tmerc", |
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"lat_0=0.000000000", "lon_0=-62.000000000", |
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"k=0.999500", "x_0=400000.000", "y_0=0.000", |
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"ellps=clrk80", "units=m"], |
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"Anguilla 1957 / British West Indies Grid", |
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epsg="200")) |
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file_contents = '''<?xml version="1.0" encoding="UTF-8"?> |
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<!DOCTYPE projectionlist SYSTEM "projfile.dtd"> |
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<projectionlist> |
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<projection name="Transverse Mercator"> |
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<parameter value="proj=tmerc"/> |
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<parameter value="ellps=clrk66"/> |
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<parameter value="lat_0=90w"/> |
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<parameter value="lon_0=90w"/> |
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<parameter value="k=1"/> |
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</projection> |
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<projection epsg="200" |
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name="Anguilla 1957 / British West Indies Grid"> |
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<parameter value="proj=tmerc"/> |
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<parameter value="lat_0=0.000000000"/> |
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<parameter value="lon_0=-62.000000000"/> |
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<parameter value="k=0.999500"/> |
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<parameter value="x_0=400000.000"/> |
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<parameter value="y_0=0.000"/> |
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<parameter value="ellps=clrk80"/> |
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<parameter value="units=m"/> |
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</projection> |
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</projectionlist> |
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''' |
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self.doTestWrite(pf, file_contents) |
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|
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def test_write_empty_file(self): |
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"""Test write empty ProjFile""" |
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pf = ProjFile(self.filename()) |
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file_contents = '''<?xml version="1.0" encoding="UTF-8"?> |
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<!DOCTYPE projectionlist SYSTEM "projfile.dtd"> |
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<projectionlist> |
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</projectionlist> |
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''' |
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self.doTestWrite(pf, file_contents) |
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|
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|
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class ProjFileLoadTestCase(support.FileLoadTestCase): |
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|
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"""Base class for the test cases that read specific test files""" |
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|
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file_extension = ".proj" |
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|
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def tearDown(self): |
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"""Clear the cache explicitly""" |
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resource.clear_proj_file_cache() |
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|
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|
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class TestLoadingProjFile(ProjFileLoadTestCase): |
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|
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file_contents = '''\ |
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<?xml version="1.0" encoding="UTF-8"?> |
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<!DOCTYPE projectionlist SYSTEM "projfile.dtd"> |
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<projectionlist> |
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<projection name="Transverse Mercator"> |
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<parameter value="proj=tmerc"/> |
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<parameter value="ellps=clrk66"/> |
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<parameter value="lat_0=90w"/> |
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<parameter value="lon_0=90w"/> |
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<parameter value="k=1"/> |
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</projection> |
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<projection epsg="200" name="Anguilla 1957 / British West Indies Grid"> |
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<parameter value="proj=tmerc"/> |
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<parameter value="lat_0=0.000000000"/> |
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<parameter value="lon_0=-62.000000000"/> |
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<parameter value="k=0.999500"/> |
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<parameter value="x_0=400000.000"/> |
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<parameter value="y_0=0.000"/> |
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<parameter value="ellps=clrk80"/> |
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<parameter value="units=m"/> |
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</projection> |
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</projectionlist> |
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''' |
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|
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def check_projection(self, proj, label, parameters): |
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"""Check the values of the proj's label and parameters""" |
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self.assertEquals(proj.Label(), label) |
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params = proj.GetAllParameters()[:] |
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params.sort() |
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self.assertEquals(params, parameters) |
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|
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def test(self): |
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projfile, warnings = resource.read_proj_file(self.filename()) |
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# no warnings |
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self.assertEquals(warnings, []) |
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|
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# There are two projections |
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projs = projfile.GetProjections() |
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self.assertEquals(len(projs), 2) |
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|
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self.check_projection(projs[0], |
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"Transverse Mercator", |
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['ellps=clrk66', 'k=1', 'lat_0=90w', 'lon_0=90w', |
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'proj=tmerc']) |
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self.check_projection(projs[1], |
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"EPSG 200 Anguilla 1957 / British West Indies Grid", |
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["ellps=clrk80", "k=0.999500", |
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"lat_0=0.000000000", "lon_0=-62.000000000", |
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"proj=tmerc", "units=m", |
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"x_0=400000.000", "y_0=0.000"]) |
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|
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def test_caching(self): |
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# test whether the projfile cache works |
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projfile, warnings = resource.read_proj_file(self.filename()) |
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projfile2, warnings = resource.read_proj_file(self.filename()) |
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|
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# Both projfiles should be the same object |
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self.assert_(projfile2 is projfile) |
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|
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# If we clear the cache we should get a new one. |
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resource.clear_proj_file_cache() |
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projfile3, warnings = resource.read_proj_file(self.filename()) |
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self.assert_(projfile3 is not projfile) |
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|
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|
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class TestLoadingProjFileWithEmptyProjectionlist(ProjFileLoadTestCase): |
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|
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file_contents = '''\ |
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<?xml version="1.0" encoding="UTF-8"?> |
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<!DOCTYPE projectionlist SYSTEM "projfile.dtd"> |
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<projectionlist> |
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</projectionlist> |
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''' |
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|
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def test(self): |
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projfile, warnings = resource.read_proj_file(self.filename()) |
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# no warnings |
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self.assertEquals(warnings, []) |
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|
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# There are no projections |
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self.assertEquals(len(projfile.GetProjections()), 0) |
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|
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|
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class TestProjFileWithInvalidParameters(ProjFileLoadTestCase): |
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|
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file_contents = '''\ |
| 431 |
<?xml version="1.0" encoding="UTF-8"?> |
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<!DOCTYPE projectionlist SYSTEM "projfile.dtd"> |
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<projectionlist> |
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<projection name="Universal Transverse Mercator"> |
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<parameter value="proj=utm"/> |
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<parameter value="ellps=clrk66"/> |
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<!-- an invalid zone number to trigger the parameter checking |
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in the proj library --> |
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<parameter value="zone=1000"/> |
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</projection> |
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<projection name="Transverse Mercator"> |
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<parameter value="proj=tmerc"/> |
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<parameter value="ellps=clrk66"/> |
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<parameter value="lat_0=90w"/> |
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<parameter value="lon_0=90w"/> |
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<parameter value="k=1"/> |
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</projection> |
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</projectionlist> |
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''' |
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|
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def setUp(self): |
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support.FileLoadTestCase.setUp(self) |
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|
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def test(self): |
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"""Test reading a proj file with invalid parameters""" |
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projfile, warnings = resource.read_proj_file(self.filename()) |
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projs = projfile.GetProjections() |
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self.assertEquals(len(projs), 1) |
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params = projs[0].GetAllParameters()[:] |
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params.sort() |
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self.assertEquals(params, ['ellps=clrk66', 'k=1', 'lat_0=90w', |
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'lon_0=90w', 'proj=tmerc']) |
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self.assertEquals(warnings, |
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['Error in projection "Universal Transverse Mercator":' |
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' invalid UTM zone number']) |
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|
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|
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if __name__ == "__main__": |
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support.run_tests() |
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