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# Copyright (c) 2002 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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Test the Thuban-specific Projection class |
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""" |
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__version__ = "$Revision$" |
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# $Source$ |
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# $Id$ |
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import unittest |
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import os |
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import support |
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support.initthuban() |
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from Thuban.Model.proj import Projection, ProjFile |
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import Thuban.Model.resource as resource |
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from test_save import sax_eventlist |
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from xml.sax import SAXParseException |
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class TestProjection(unittest.TestCase, support.FloatComparisonMixin): |
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"""Test cases for the Thuban-specific Projection class |
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""" |
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def test(self): |
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"""Test Projection""" |
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proj = Projection(["zone=26", "proj=utm", "ellps=clrk66"]) |
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self.assertEquals(proj.params, ["zone=26", "proj=utm", "ellps=clrk66"]) |
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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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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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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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sample_projfile = '''\ |
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<?xml version="1.0" encoding="UTF-8"?> |
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<!DOCTYPE projfile SYSTEM "thuban.dtd"> |
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<projectionlist> |
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<projection name="Transverse Mercartor"> |
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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 Mercartor"> |
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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 Mercartor"> |
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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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sample_projfile_data = [("Transverse Mercartor", ["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 Mercartor", ["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 Mercartor", ["proj=utm", |
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"ellps=clrk66", |
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"zone=1"])] |
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sample_projfile2 = '''\ |
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<?xml version="1.0" encoding="UTF-8"?> |
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<!DOCTYPE projfile SYSTEM "thuban.dtd"> |
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<projectionlist> |
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</projectionlist> |
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''' |
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sample_projfile_data2 = [] |
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class TestProjFile(unittest.TestCase, support.FileTestMixin): |
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"""Test cases for reading and writing projection 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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def testRead(self): |
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"""Test ReadProjFile""" |
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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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# file doesn't exist |
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# |
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self.assertRaises(IOError, |
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resource.ReadProjFile, self.temp_file_name("nonexistent.proj")) |
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# |
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# file isn't readable |
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# |
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filename = self.temp_file_name("projfile.proj") |
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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.ReadProjFile, filename) |
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os.chmod(filename, 0600) # read/write so we reuse the file |
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# |
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# file has invalid XML (or none at all) |
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# |
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filename = self.temp_file_name("projfile.proj") |
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file = open(filename, "w") |
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file.close() |
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self.assertRaises(SAXParseException, resource.ReadProjFile, filename) |
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def testWrite(self): |
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"""Test WriteProjFile""" |
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self.doTestWrite(sample_projfile_data, sample_projfile) |
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self.doTestWrite(sample_projfile_data2, sample_projfile2) |
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def doTestWrite(self, data, expected): |
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filename = self.temp_file_name("projfile.proj") |
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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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resource.WriteProjFile(pf) |
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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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def doTestRead(self, data, input): |
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filename = self.temp_file_name("projfile.proj") |
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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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pf = resource.ReadProjFile(filename) |
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eq = self.assertEquals |
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eq(pf.GetFileName(), filename) |
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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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if __name__ == "__main__": |
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unittest.main() |
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