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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 Layer 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 os |
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import unittest |
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|
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import support |
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support.initthuban() |
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|
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import shapelib |
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import dbflib |
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|
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from Thuban.Model.session import Session |
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from Thuban.Model.layer import BaseLayer, Layer, RasterLayer, \ |
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SHAPETYPE_POLYGON, SHAPETYPE_ARC, SHAPETYPE_POINT |
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from Thuban.Model.messages import LAYER_LEGEND_CHANGED, \ |
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LAYER_VISIBILITY_CHANGED, LAYER_SHAPESTORE_REPLACED, LAYER_CHANGED |
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from Thuban.Model.color import Color |
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from Thuban.Model.table import FIELDTYPE_DOUBLE, FIELDTYPE_STRING, MemoryTable |
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from Thuban.Model.proj import Projection |
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from Thuban.Model.data import DerivedShapeStore |
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from Thuban.Model.classification import Classification, ClassGroupSingleton |
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|
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import Thuban.Model.resource |
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|
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class TestLayer(unittest.TestCase, support.FileTestMixin, |
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support.FloatComparisonMixin): |
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|
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"""Test cases for different layer (shape) types""" |
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|
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def assertFloatTuplesEqual(self, test, value): |
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"""Assert equality of two lists of tuples of float""" |
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for i in range(len(test)): |
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self.assertFloatSeqEqual(test[i], value[i]) |
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|
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def setUp(self): |
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"""Create a session self.session and initialize self.layer to None""" |
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self.session = Session("Test session for %s" % self.__class__) |
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self.layer = None |
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|
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def tearDown(self): |
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"""Call the layer's Destroy method and set session and layer to None""" |
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self.session = None |
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if self.layer is not None: |
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self.layer.Destroy() |
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self.layer = None |
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|
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def build_path(self, filename): |
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return os.path.join("..", "Data", "iceland", filename) |
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|
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def open_shapefile(self, filename): |
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"""Open and return a shapestore for filename in the iceland data set""" |
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return self.session.OpenShapefile(self.build_path(filename)) |
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|
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def test_base_layer(self): |
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layer = self.layer = BaseLayer("Test BaseLayer") |
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self.assertEquals(layer.Title(), "Test BaseLayer") |
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self.failUnless(layer.Visible()) |
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|
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# toggle visibility |
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layer.SetVisible(False) |
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self.failIf(layer.Visible()) |
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|
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layer.SetVisible(True) |
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self.failUnless(layer.Visible()) |
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|
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self.failIf(layer.HasClassification()) |
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self.failIf(layer.HasShapes()) |
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|
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self.assertEquals(layer.GetProjection(), None) |
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|
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# set/get projection |
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proj = Projection(["proj=utm", "zone=26"]) |
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|
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layer.SetProjection(proj) |
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self.failUnless(layer.GetProjection() is proj) |
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|
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# __init__ with other arguments |
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layer = BaseLayer("Test BaseLayer", False, proj) |
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self.failIf(layer.Visible()) |
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self.failUnless(layer.GetProjection() is proj) |
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|
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def test_arc_layer(self): |
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"""Test Layer with arc shapes""" |
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layer = self.layer = Layer("Test Layer", |
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self.open_shapefile("roads-line.shp")) |
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self.failUnless(layer.HasClassification()) |
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self.failUnless(layer.HasShapes()) |
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self.assertEquals(layer.ShapeType(), SHAPETYPE_ARC) |
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self.assertEquals(layer.NumShapes(), 839) |
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shape = layer.Shape(32) |
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self.assertFloatTuplesEqual(shape.Points(), |
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[(-15.082174301147461, 66.27738189697265), |
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(-15.026350021362305, 66.27339172363281)]) |
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self.assertFloatSeqEqual(layer.BoundingBox(), |
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[-24.450359344482422, 63.426830291748047, |
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-13.55668830871582, 66.520111083984375]) |
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self.assertEquals(layer.ShapesInRegion((-24.0, 64.0, -23.75, 64.25)), |
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[613, 726, 838]) |
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|
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self.assertFloatSeqEqual(layer.ShapesBoundingBox([32]), |
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[-15.082174301147461, 66.27339172363281, |
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-15.026350021362305, 66.27738189697265]) |
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|
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shape = layer.Shape(33) |
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self.assertFloatTuplesEqual(shape.Points(), |
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[(-22.248506546020508, 66.30645751953125), |
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(-22.232730865478516, 66.294075012207031), |
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(-22.23158073425293, 66.287689208984375), |
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(-22.246318817138672, 66.270065307617188)]) |
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|
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self.assertFloatSeqEqual(layer.ShapesBoundingBox([32, 33]), |
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[-22.248506546020508, 66.270065307617188, |
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-15.026350021362305, 66.30645751953125]) |
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|
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self.assertEquals(layer.ShapesBoundingBox([]), None) |
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self.assertEquals(layer.ShapesBoundingBox(None), None) |
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|
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def test_polygon_layer(self): |
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"""Test Layer with polygon shapes""" |
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layer = self.layer = Layer("Test Layer", |
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self.open_shapefile("political.shp")) |
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self.failUnless(layer.HasClassification()) |
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self.failUnless(layer.HasShapes()) |
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self.assertEquals(layer.ShapeType(), SHAPETYPE_POLYGON) |
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self.assertEquals(layer.NumShapes(), 156) |
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shape = layer.Shape(4) |
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self.assertFloatTuplesEqual(shape.Points(), |
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[(-22.406391143798828, 64.714111328125), |
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(-22.41621208190918, 64.71600341796875), |
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(-22.406051635742188, 64.719200134277344), |
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(-22.406391143798828, 64.714111328125)]) |
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self.assertFloatSeqEqual(layer.BoundingBox(), |
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[-24.546524047851562, 63.286754608154297, |
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-13.495815277099609, 66.563774108886719]) |
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self.assertEquals(layer.ShapesInRegion((-24.0, 64.0, -23.9, 64.1)), |
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[91, 92, 144, 146, 148, 150, 152, 153]) |
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|
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def test_point_layer(self): |
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"""Test Layer with point shapes""" |
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layer = self.layer = Layer("Test Layer", |
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self.open_shapefile("cultural_landmark-point.shp")) |
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self.failUnless(layer.HasClassification()) |
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self.failUnless(layer.HasShapes()) |
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self.assertEquals(layer.ShapeType(), SHAPETYPE_POINT) |
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self.assertEquals(layer.NumShapes(), 34) |
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shape = layer.Shape(0) |
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self.assertFloatTuplesEqual(shape.Points(), |
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[(-22.711074829101562, 66.36572265625)]) |
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self.assertFloatSeqEqual(layer.BoundingBox(), |
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[-23.806047439575195, 63.405960083007812, |
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-15.12291431427002, 66.36572265625]) |
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self.assertEquals(layer.ShapesInRegion((-24.0, 64.0, -23.80, 64.1)), |
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[0, 1, 2, 3, 4, 5, 27, 28, 29, 30, 31]) |
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|
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def test_empty_layer(self): |
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"""Test Layer with empty shape file""" |
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# create an empty shape file |
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shapefilename = self.temp_file_name("layer_empty.shp") |
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shp = shapelib.create(shapefilename, shapelib.SHPT_POLYGON) |
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shp.close() |
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# create an empty DBF file too because Thuban can't cope yet |
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# with missing DBF file. |
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dbffilename = self.temp_file_name("layer_empty.dbf") |
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dbf = dbflib.create(dbffilename) |
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dbf.add_field("NAME", dbflib.FTString, 20, 0) |
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|
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# Now try to open it. |
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layer = self.layer = Layer("Empty Layer", |
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self.session.OpenShapefile(shapefilename)) |
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self.assertEquals(layer.BoundingBox(), None) |
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self.assertEquals(layer.LatLongBoundingBox(), None) |
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self.assertEquals(layer.NumShapes(), 0) |
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|
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def test_get_field_type(self): |
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"""Test Layer.GetFieldType()""" |
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layer = self.layer = Layer("Test Layer", |
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self.open_shapefile("roads-line.shp")) |
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self.assertEquals(layer.GetFieldType("LENGTH"), FIELDTYPE_DOUBLE) |
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self.assertEquals(layer.GetFieldType("non existing"), None) |
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|
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def test_raster_layer(self): |
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if not Thuban.Model.resource.has_gdal_support(): |
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return |
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|
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filename = self.build_path("island.tif") |
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layer = RasterLayer("Test RasterLayer", filename) |
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self.failIf(layer.HasClassification()) |
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self.failIf(layer.HasShapes()) |
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self.assertEquals(layer.GetImageFilename(), filename) |
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self.assertFloatSeqEqual(layer.BoundingBox(), |
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[-24.5500000, 63.2833330, |
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-13.4916670, 66.5666670]) |
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self.assertFloatSeqEqual(layer.LatLongBoundingBox(), |
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[-24.5500000, 63.2833330, |
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-13.4916670, 66.5666670]) |
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|
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def test_derived_store(self): |
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"""Test layer with derived store""" |
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layer = self.layer = Layer("Test Layer", |
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self.open_shapefile("roads-line.shp")) |
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try: |
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store = layer.ShapeStore() |
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derived = DerivedShapeStore(store, store.Table()) |
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layer.SetShapeStore(derived) |
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self.assert_(layer.ShapeStore() is derived) |
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|
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# check that an exception is raised when the number |
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# of shapes differ from the number of rows in a table. |
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layer2 = Layer("Test Layer", |
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self.open_shapefile("political.shp")) |
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store2 = layer2.ShapeStore() |
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self.assertRaises(ValueError, |
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DerivedShapeStore, store2, store.Table()) |
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|
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finally: |
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store = derived = None |
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layer2.Destroy() |
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store2 = None |
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|
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|
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class SetShapeStoreTests(unittest.TestCase, support.SubscriberMixin): |
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|
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def setUp(self): |
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"""Create a layer with a classification as self.layer""" |
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self.clear_messages() |
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self.session = Session("Test session for %s" % self.__class__) |
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self.shapefilename = os.path.join("..", "Data", "iceland", |
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"cultural_landmark-point.dbf") |
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self.store = self.session.OpenShapefile(self.shapefilename) |
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self.layer = Layer("test layer", self.store) |
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self.classification = Classification(field = "CLPTLABEL") |
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self.classification.AppendGroup(ClassGroupSingleton("FARM")) |
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self.layer.SetClassification(self.classification) |
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self.layer.UnsetModified() |
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self.layer.Subscribe(LAYER_SHAPESTORE_REPLACED, |
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self.subscribe_with_params, |
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LAYER_SHAPESTORE_REPLACED) |
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self.layer.Subscribe(LAYER_CHANGED, |
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self.subscribe_with_params, LAYER_CHANGED) |
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|
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def tearDown(self): |
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self.clear_messages() |
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self.layer.Destroy() |
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self.session.Destroy() |
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self.session = self.layer = self.store = self.classification = None |
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|
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def test_sanity(self): |
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"""SetShapeStoreTests sanity check |
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|
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Test the initial state of the test case instances after setUp. |
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""" |
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cls = self.layer.GetClassification() |
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self.assert_(cls is self.classification) |
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self.assertEquals(cls.GetField(), "CLPTLABEL") |
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self.assertEquals(cls.GetFieldType(), FIELDTYPE_STRING) |
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self.assertEquals(self.layer.GetClassification().GetNumGroups(), 1) |
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self.failIf(self.layer.WasModified()) |
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|
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def test_set_shape_store_modified_flag(self): |
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"""Test whether Layer.SetShapeStore() sets the modified flag""" |
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memtable = MemoryTable([("FOO", FIELDTYPE_STRING)], |
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[("bla",)] * self.layer.ShapeStore().Table().NumRows()) |
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self.layer.SetShapeStore(DerivedShapeStore(self.store, memtable)) |
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|
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self.assert_(self.layer.WasModified()) |
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|
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def test_set_shape_store_different_field_name(self): |
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"""Test Layer.SetShapeStore() with different column name""" |
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memtable = MemoryTable([("FOO", FIELDTYPE_STRING)], |
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[("bla",)] * self.layer.ShapeStore().Table().NumRows()) |
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self.layer.SetShapeStore(DerivedShapeStore(self.store, memtable)) |
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# The classification should contain only the default group now. |
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self.assertEquals(self.layer.GetClassification().GetNumGroups(), 0) |
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self.check_messages([(self.layer, LAYER_CHANGED), |
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(self.layer, LAYER_SHAPESTORE_REPLACED)]) |
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|
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def test_set_shape_store_same_field(self): |
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"""Test Layer.SetShapeStore() with same column name and type""" |
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memtable = MemoryTable([("CLPTLABEL", FIELDTYPE_STRING)], |
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[("bla",)] * self.layer.ShapeStore().Table().NumRows()) |
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self.layer.SetShapeStore(DerivedShapeStore(self.store, memtable)) |
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# The classification should be the same as before |
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self.assert_(self.layer.GetClassification() is self.classification) |
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self.check_messages([(self.layer, LAYER_SHAPESTORE_REPLACED)]) |
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|
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def test_set_shape_store_same_field_different_type(self): |
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"""Test Layer.SetShapeStore() with same column name but different type |
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""" |
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memtable = MemoryTable([("CLPTLABEL", FIELDTYPE_DOUBLE)], |
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[(0.0,)] * self.layer.ShapeStore().Table().NumRows()) |
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self.layer.SetShapeStore(DerivedShapeStore(self.store, memtable)) |
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# The classification should contain only the default group now. |
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self.assertEquals(self.layer.GetClassification().GetNumGroups(), 0) |
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self.check_messages([(self.layer, LAYER_CHANGED), |
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(self.layer, LAYER_SHAPESTORE_REPLACED)]) |
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|
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|
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class TestLayerLegend(unittest.TestCase, support.SubscriberMixin): |
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|
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"""Test cases for Layer method that modify the layer. |
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""" |
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|
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def setUp(self): |
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"""Clear the list of received messages and create a layer and a session |
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|
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The layer is bound to self.layer and the session to self.session. |
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""" |
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self.clear_messages() |
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self.session = Session("Test session for %s" % self.__class__) |
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filename = os.path.join("..", "Data", "iceland", "political.shp") |
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self.layer = Layer("Test Layer", |
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self.session.OpenShapefile(filename)) |
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self.layer.Subscribe(LAYER_LEGEND_CHANGED, self.subscribe_with_params, |
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LAYER_LEGEND_CHANGED) |
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self.layer.Subscribe(LAYER_VISIBILITY_CHANGED, |
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self.subscribe_with_params, |
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LAYER_VISIBILITY_CHANGED) |
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|
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def tearDown(self): |
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"""Clear the list of received messages and explictly destroy self.layer |
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""" |
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self.layer.Destroy() |
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self.layer = None |
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self.session.Destroy() |
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self.session = None |
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self.clear_messages() |
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|
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def test_initial_settings(self): |
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"""Test Layer's initial legend attributes""" |
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# test default settings |
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self.failIf(self.layer.WasModified()) |
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#self.assertEquals(self.layer.fill, None) |
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#self.assertEquals(self.layer.stroke.hex(), "#000000") |
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#self.assertEquals(self.layer.stroke_width, 1) |
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self.assertEquals(self.layer.Visible(), 1) |
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# no messages should have been produced |
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self.check_messages([]) |
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|
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def test_visibility(self): |
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"""Test Layer visibility""" |
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self.layer.SetVisible(0) |
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self.assertEquals(self.layer.Visible(), 0) |
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self.check_messages([(self.layer, LAYER_VISIBILITY_CHANGED)]) |
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|
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# currently, modifying the visibility doesn't count as changing |
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# the layer. |
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self.failIf(self.layer.WasModified()) |
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|
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|
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# |
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# the tree info now contains Color objects which are difficult to test |
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# |
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# def test_tree_info(self): |
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# """Test Layer.TreeInfo""" |
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# self.assertEquals(self.layer.TreeInfo(), |
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# ("Layer 'Test Layer'", |
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# ['Shown', |
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# 'Shapes: 156', |
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# ('Extent (lat-lon):' |
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# ' (-24.5465, 63.2868, -13.4958, 66.5638)'), |
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# 'Shapetype: Polygon', |
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# 'Fill: None', |
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# 'Outline: (0.000, 0.000, 0.000)'])) |
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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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