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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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|
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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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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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|
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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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|
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sample_projfile = '''\ |
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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 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=30w"/> |
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<parameter value="lon_0=30w"/> |
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<parameter value="k=1"/> |
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</projection> |
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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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<parameter value="zone=1"/> |
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</projection> |
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</projectionlist> |
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''' |
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|
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sample_projfile_data = [("Transverse Mercator", ["proj=tmerc", |
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"ellps=clrk66", |
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"lat_0=90w", |
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"lon_0=90w", |
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"k=1"]), |
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("Transverse Mercator", ["proj=tmerc", |
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"ellps=clrk66", |
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"lat_0=30w", |
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"lon_0=30w", |
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"k=1"]), |
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("Universal Transverse Mercator", ["proj=utm", |
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"ellps=clrk66", |
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"zone=1"])] |
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|
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sample_projfile2 = '''\ |
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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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sample_projfile_data2 = [] |
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|
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class ProjFileTest(unittest.TestCase, support.FileTestMixin): |
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|
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"""Base class for the proj file tests""" |
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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 TestProjFile(ProjFileTest, xmlsupport.ValidationTest): |
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|
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"""Test cases for reading and writing projection files. |
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""" |
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|
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def test(self): |
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"""Test ProjFile""" |
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|
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proj0 = Projection(["proj=tmerc", "ellps=clrk66"]) |
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proj1 = Projection(["proj=utm", "ellps=clrk66"]) |
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proj2 = Projection(["proj=lcc", "ellps=clrk66", |
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"lat_1=0", "lat_2=20"]) |
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|
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eq = self.assertEquals |
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|
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|
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# |
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# __init__() |
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# GetFilename() |
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# SetFilename() |
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# |
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for name in ["", "hello_world"]: |
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projFile = ProjFile(name) |
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eq(projFile.GetFilename(), name) |
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|
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projFile.SetFilename("XXX") |
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projFile.SetFilename(name) |
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eq(projFile.GetFilename(), name) |
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|
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# initial number of projections should be 0 |
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eq(len(projFile.GetProjections()), 0) |
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|
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# |
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# Add() |
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# Remove() |
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# |
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projFile.Add(proj0) |
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eq(len(projFile.GetProjections()), 1) |
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projFile.Remove(proj0) |
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eq(len(projFile.GetProjections()), 0) |
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|
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# try to remove something that doesn't exist |
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self.assertRaises(ValueError, projFile.Remove, None) |
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self.assertRaises(ValueError, projFile.Remove, proj0) |
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|
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projFile.Add(proj0) |
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projFile.Add(proj1) |
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projFile.Add(proj2) |
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eq(len(projFile.GetProjections()), 3) |
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|
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# GetProjections() -- tests order |
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projs = projFile.GetProjections() |
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eq(projs[0], proj0) |
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eq(projs[1], proj1) |
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eq(projs[2], proj2) |
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|
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projFile.Remove(proj2) |
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projFile.Remove(proj1) |
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|
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# Replace() |
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projFile.Replace(proj0, proj1) |
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projs = projFile.GetProjections() |
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eq(projs[0], proj1) |
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|
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# replace a non-existent projection |
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self.assertRaises(ValueError, projFile.Replace, None, proj2) |
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self.assertRaises(ValueError, projFile.Replace, proj0, proj2) |
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|
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def testRead(self): |
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"""Test read_proj_file""" |
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self.doTestRead(sample_projfile_data, sample_projfile) |
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self.doTestRead(sample_projfile_data2, sample_projfile2) |
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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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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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os.chmod(filename, 0600) # read/write so we reuse the file |
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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 doTestRead(self, data, input): |
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|
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filename = self.filename() |
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file = open(filename, "w") |
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file.write(input) |
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file.close() |
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|
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pf, warnings = resource.read_proj_file(filename) |
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self.assertEquals(warnings, []) |
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|
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eq = self.assertEquals |
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|
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eq(pf.GetFilename(), filename) |
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|
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for proj, d in zip(pf.GetProjections(), data): |
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eq(proj.GetName(), d[0]) |
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for param in proj.GetAllParameters(): |
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self.assert_(param in d[1]) |
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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() |
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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 = resource.get_system_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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|
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class WriteProjFileTests(ProjFileTest, xmlsupport.ValidationTest): |
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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, data, expected): |
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filename = self.filename() |
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|
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pf = ProjFile(filename) |
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for proj in data: |
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pf.Add(Projection(proj[1], proj[0])) |
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|
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resource.write_proj_file(pf) |
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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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self.doTestWrite(sample_projfile_data, sample_projfile) |
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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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self.doTestWrite(sample_projfile_data2, sample_projfile2) |
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|
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|
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class TestProjFileWithInvalidParameters(unittest.TestCase, |
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support.FileLoadTestCase): |
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|
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file_extension = ".proj" |
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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="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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unittest.main() |
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