/[thuban]/branches/WIP-pyshapelib-bramz/test/test_layer.py
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revision 723 by bh, Thu Apr 24 15:31:53 2003 UTC revision 1438 by jonathan, Wed Jul 16 13:25:30 2003 UTC
# Line 23  import shapelib Line 23  import shapelib
23  import dbflib  import dbflib
24    
25  from Thuban.Model.session import Session  from Thuban.Model.session import Session
26  from Thuban.Model.layer import Layer, SHAPETYPE_POLYGON, SHAPETYPE_ARC, \  from Thuban.Model.layer import BaseLayer, Layer, RasterLayer, \
27       SHAPETYPE_POINT       SHAPETYPE_POLYGON, SHAPETYPE_ARC, SHAPETYPE_POINT
28  from Thuban.Model.messages import LAYER_LEGEND_CHANGED, \  from Thuban.Model.messages import LAYER_LEGEND_CHANGED, \
29       LAYER_VISIBILITY_CHANGED       LAYER_VISIBILITY_CHANGED, LAYER_SHAPESTORE_REPLACED, LAYER_CHANGED
30  from Thuban.Model.color import Color  from Thuban.Model.color import Color
31    from Thuban.Model.table import FIELDTYPE_DOUBLE, FIELDTYPE_STRING, MemoryTable
32    from Thuban.Model.proj import Projection
33    from Thuban.Model.data import DerivedShapeStore
34    from Thuban.Model.classification import Classification, ClassGroupSingleton
35    
36    import Thuban.Model.resource
37    
38  class TestLayer(unittest.TestCase, support.FileTestMixin,  class TestLayer(unittest.TestCase, support.FileTestMixin,
39                  support.FloatComparisonMixin):                  support.FloatComparisonMixin):
# Line 40  class TestLayer(unittest.TestCase, suppo Line 46  class TestLayer(unittest.TestCase, suppo
46              self.assertFloatSeqEqual(test[i], value[i])              self.assertFloatSeqEqual(test[i], value[i])
47    
48      def setUp(self):      def setUp(self):
49          """Create a session"""          """Create a session self.session and initialize self.layer to None"""
50          self.session = Session("Test session for %s" % self.__class__)          self.session = Session("Test session for %s" % self.__class__)
51            self.layer = None
52    
53      def tearDown(self):      def tearDown(self):
54            """Call the layer's Destroy method and set session and layer to None"""
55          self.session = None          self.session = None
56            if self.layer is not None:
57                self.layer.Destroy()
58                self.layer = None
59    
60        def build_path(self, filename):
61            return os.path.join("..", "Data", "iceland", filename)
62    
63        def open_shapefile(self, filename):
64            """Open and return a shapestore for filename in the iceland data set"""
65            return self.session.OpenShapefile(self.build_path(filename))
66    
67        def test_base_layer(self):
68            layer = self.layer = BaseLayer("Test BaseLayer")
69            self.assertEquals(layer.Title(), "Test BaseLayer")
70            self.failUnless(layer.Visible())
71    
72            # toggle visibility
73            layer.SetVisible(False)
74            self.failIf(layer.Visible())
75    
76            layer.SetVisible(True)
77            self.failUnless(layer.Visible())
78    
79            self.failIf(layer.HasClassification())
80            self.failIf(layer.HasShapes())
81    
82            self.assertEquals(layer.GetProjection(), None)
83    
84            # set/get projection
85            proj = Projection(["proj=utm", "zone=26"])
86    
87            layer.SetProjection(proj)
88            self.failUnless(layer.GetProjection() is proj)
89    
90            # __init__ with other arguments
91            layer = BaseLayer("Test BaseLayer", False, proj)
92            self.failIf(layer.Visible())
93            self.failUnless(layer.GetProjection() is proj)
94    
95      def test_arc_layer(self):      def test_arc_layer(self):
96          """Test Layer with arc shapes"""          """Test Layer with arc shapes"""
97          filename = os.path.join("..", "Data", "iceland", "roads-line.shp")          layer = self.layer = Layer("Test Layer",
98          layer = Layer("Test Layer", self.session.OpenShapefile(filename))                                     self.open_shapefile("roads-line.shp"))
99          self.assertEquals(layer.Title(), "Test Layer")          self.failUnless(layer.HasClassification())
100            self.failUnless(layer.HasShapes())
101          self.assertEquals(layer.ShapeType(), SHAPETYPE_ARC)          self.assertEquals(layer.ShapeType(), SHAPETYPE_ARC)
102          self.assertEquals(layer.NumShapes(), 839)          self.assertEquals(layer.NumShapes(), 839)
103          shape = layer.Shape(32)          shape = layer.Shape(32)
# Line 62  class TestLayer(unittest.TestCase, suppo Line 109  class TestLayer(unittest.TestCase, suppo
109                                    -13.55668830871582, 66.520111083984375])                                    -13.55668830871582, 66.520111083984375])
110          self.assertEquals(layer.ShapesInRegion((-24.0, 64.0, -23.75, 64.25)),          self.assertEquals(layer.ShapesInRegion((-24.0, 64.0, -23.75, 64.25)),
111                            [613, 726, 838])                            [613, 726, 838])
112          layer.Destroy()  
113            self.assertFloatSeqEqual(layer.ShapesBoundingBox([32]),
114                              [-15.082174301147461, 66.27339172363281,
115                               -15.026350021362305, 66.27738189697265])
116    
117            shape = layer.Shape(33)
118            self.assertFloatTuplesEqual(shape.Points(),
119                                        [(-22.248506546020508, 66.30645751953125),
120                                         (-22.232730865478516, 66.294075012207031),
121                                         (-22.23158073425293,  66.287689208984375),
122                                         (-22.246318817138672, 66.270065307617188)])
123    
124            self.assertFloatSeqEqual(layer.ShapesBoundingBox([32, 33]),
125                                     [-22.248506546020508, 66.270065307617188,
126                                      -15.026350021362305, 66.30645751953125])
127    
128            self.assertEquals(layer.ShapesBoundingBox([]), None)
129            self.assertEquals(layer.ShapesBoundingBox(None), None)
130    
131      def test_polygon_layer(self):      def test_polygon_layer(self):
132          """Test Layer with polygon shapes"""          """Test Layer with polygon shapes"""
133          filename = os.path.join("..", "Data", "iceland", "political.shp")          layer = self.layer = Layer("Test Layer",
134          layer = Layer("Test Layer", self.session.OpenShapefile(filename))                                     self.open_shapefile("political.shp"))
135          self.assertEquals(layer.Title(), "Test Layer")          self.failUnless(layer.HasClassification())
136            self.failUnless(layer.HasShapes())
137          self.assertEquals(layer.ShapeType(), SHAPETYPE_POLYGON)          self.assertEquals(layer.ShapeType(), SHAPETYPE_POLYGON)
138          self.assertEquals(layer.NumShapes(), 156)          self.assertEquals(layer.NumShapes(), 156)
139          shape = layer.Shape(4)          shape = layer.Shape(4)
# Line 82  class TestLayer(unittest.TestCase, suppo Line 147  class TestLayer(unittest.TestCase, suppo
147                                    -13.495815277099609, 66.563774108886719])                                    -13.495815277099609, 66.563774108886719])
148          self.assertEquals(layer.ShapesInRegion((-24.0, 64.0, -23.9, 64.1)),          self.assertEquals(layer.ShapesInRegion((-24.0, 64.0, -23.9, 64.1)),
149                            [91, 92, 144, 146, 148, 150, 152, 153])                            [91, 92, 144, 146, 148, 150, 152, 153])
         layer.Destroy()  
150    
151      def test_point_layer(self):      def test_point_layer(self):
152          """Test Layer with point shapes"""          """Test Layer with point shapes"""
153          filename = os.path.join("..", "Data", "iceland",          layer = self.layer = Layer("Test Layer",
154                                  "cultural_landmark-point.shp")                             self.open_shapefile("cultural_landmark-point.shp"))
155          layer = Layer("Test Layer", self.session.OpenShapefile(filename))          self.failUnless(layer.HasClassification())
156          self.assertEquals(layer.Title(), "Test Layer")          self.failUnless(layer.HasShapes())
157          self.assertEquals(layer.ShapeType(), SHAPETYPE_POINT)          self.assertEquals(layer.ShapeType(), SHAPETYPE_POINT)
158          self.assertEquals(layer.NumShapes(), 34)          self.assertEquals(layer.NumShapes(), 34)
159          shape = layer.Shape(0)          shape = layer.Shape(0)
# Line 100  class TestLayer(unittest.TestCase, suppo Line 164  class TestLayer(unittest.TestCase, suppo
164                                    -15.12291431427002, 66.36572265625])                                    -15.12291431427002, 66.36572265625])
165          self.assertEquals(layer.ShapesInRegion((-24.0, 64.0, -23.80, 64.1)),          self.assertEquals(layer.ShapesInRegion((-24.0, 64.0, -23.80, 64.1)),
166                            [0, 1, 2, 3, 4, 5, 27, 28, 29, 30, 31])                            [0, 1, 2, 3, 4, 5, 27, 28, 29, 30, 31])
         layer.Destroy()  
167    
168      def test_empty_layer(self):      def test_empty_layer(self):
169          """Test Layer with empty shape file"""          """Test Layer with empty shape file"""
# Line 115  class TestLayer(unittest.TestCase, suppo Line 178  class TestLayer(unittest.TestCase, suppo
178          dbf.add_field("NAME", dbflib.FTString, 20, 0)          dbf.add_field("NAME", dbflib.FTString, 20, 0)
179    
180          # Now try to open it.          # Now try to open it.
181          layer = Layer("Empty Layer",          layer = self.layer = Layer("Empty Layer",
182                        self.session.OpenShapefile(shapefilename))                                     self.session.OpenShapefile(shapefilename))
183          self.assertEquals(layer.BoundingBox(), None)          self.assertEquals(layer.BoundingBox(), None)
184          self.assertEquals(layer.LatLongBoundingBox(), None)          self.assertEquals(layer.LatLongBoundingBox(), None)
185          self.assertEquals(layer.NumShapes(), 0)          self.assertEquals(layer.NumShapes(), 0)
186          layer.Destroy()  
187        def test_get_field_type(self):
188            """Test Layer.GetFieldType()"""
189            layer = self.layer = Layer("Test Layer",
190                                       self.open_shapefile("roads-line.shp"))
191            self.assertEquals(layer.GetFieldType("LENGTH"), FIELDTYPE_DOUBLE)
192            self.assertEquals(layer.GetFieldType("non existing"), None)
193    
194        def test_raster_layer(self):
195            if not Thuban.Model.resource.has_gdal_support():
196                return
197    
198            filename = self.build_path("island.tif")
199            layer = RasterLayer("Test RasterLayer", filename)
200            self.failIf(layer.HasClassification())
201            self.failIf(layer.HasShapes())
202            self.assertEquals(layer.GetImageFilename(), filename)
203            self.assertFloatSeqEqual(layer.BoundingBox(),
204                                     [-24.5500000, 63.2833330,
205                                      -13.4916670, 66.5666670])
206            self.assertFloatSeqEqual(layer.LatLongBoundingBox(),
207                                     [-24.5500000, 63.2833330,
208                                      -13.4916670, 66.5666670])
209    
210        def test_derived_store(self):
211            """Test layer with derived store"""
212            layer = self.layer = Layer("Test Layer",
213                                       self.open_shapefile("roads-line.shp"))
214            try:
215                store = layer.ShapeStore()
216                derived = DerivedShapeStore(store, store.Table())
217                layer.SetShapeStore(derived)
218                self.assert_(layer.ShapeStore() is derived)
219    
220                # check that an exception is raised when the number
221                # of shapes differ from the number of rows in a table.
222                layer2 = Layer("Test Layer",
223                               self.open_shapefile("political.shp"))
224                store2 = layer2.ShapeStore()
225                self.assertRaises(ValueError,
226                                  DerivedShapeStore, store2, store.Table())
227    
228            finally:
229                store = derived = None
230                layer2.Destroy()
231                store2 = None
232    
233    
234    class SetShapeStoreTests(unittest.TestCase, support.SubscriberMixin):
235    
236        def setUp(self):
237            """Create a layer with a classification as self.layer"""
238            self.clear_messages()
239            self.session = Session("Test session for %s" % self.__class__)
240            self.shapefilename = os.path.join("..", "Data", "iceland",
241                                              "cultural_landmark-point.dbf")
242            self.store = self.session.OpenShapefile(self.shapefilename)
243            self.layer = Layer("test layer", self.store)
244            self.classification = Classification()
245            self.classification.AppendGroup(ClassGroupSingleton("FARM"))
246            self.layer.SetClassificationField("CLPTLABEL")
247            self.layer.SetClassification(self.classification)
248            self.layer.UnsetModified()
249            self.layer.Subscribe(LAYER_SHAPESTORE_REPLACED,
250                                 self.subscribe_with_params,
251                                 LAYER_SHAPESTORE_REPLACED)
252            self.layer.Subscribe(LAYER_CHANGED,
253                                 self.subscribe_with_params, LAYER_CHANGED)
254    
255        def tearDown(self):
256            self.clear_messages()
257            self.layer.Destroy()
258            self.session.Destroy()
259            self.session = self.layer = self.store = self.classification = None
260    
261        def test_sanity(self):
262            """SetShapeStoreTests sanity check
263    
264            Test the initial state of the test case instances after setUp.
265            """
266            cls = self.layer.GetClassification()
267            self.assert_(cls is self.classification)
268            field = self.layer.GetClassificationField()
269            self.assertEquals(field, "CLPTLABEL")
270            self.assertEquals(self.layer.GetFieldType(field), FIELDTYPE_STRING)
271            self.assertEquals(self.layer.GetClassification().GetNumGroups(), 1)
272            self.failIf(self.layer.WasModified())
273    
274        def test_set_shape_store_modified_flag(self):
275            """Test whether Layer.SetShapeStore() sets the modified flag"""
276            memtable = MemoryTable([("FOO", FIELDTYPE_STRING)],
277                          [("bla",)] * self.layer.ShapeStore().Table().NumRows())
278            self.layer.SetShapeStore(DerivedShapeStore(self.store, memtable))
279    
280            self.assert_(self.layer.WasModified())
281    
282        def test_set_shape_store_different_field_name(self):
283            """Test Layer.SetShapeStore() with different column name"""
284            memtable = MemoryTable([("FOO", FIELDTYPE_STRING)],
285                          [("bla",)] * self.layer.ShapeStore().Table().NumRows())
286            self.layer.SetShapeStore(DerivedShapeStore(self.store, memtable))
287            # The classification should contain only the default group now.
288            self.assertEquals(self.layer.GetClassification().GetNumGroups(), 0)
289            self.check_messages([(self.layer, LAYER_CHANGED),
290                                 (self.layer, LAYER_SHAPESTORE_REPLACED)])
291    
292        def test_set_shape_store_same_field(self):
293            """Test Layer.SetShapeStore() with same column name and type"""
294            memtable = MemoryTable([("CLPTLABEL", FIELDTYPE_STRING)],
295                          [("bla",)] * self.layer.ShapeStore().Table().NumRows())
296            self.layer.SetShapeStore(DerivedShapeStore(self.store, memtable))
297            # The classification should be the same as before
298            self.assert_(self.layer.GetClassification() is self.classification)
299            self.check_messages([(self.layer, LAYER_SHAPESTORE_REPLACED)])
300    
301        def test_set_shape_store_same_field_different_type(self):
302            """Test Layer.SetShapeStore() with same column name but different type
303            """
304            memtable = MemoryTable([("CLPTLABEL", FIELDTYPE_DOUBLE)],
305                          [(0.0,)] * self.layer.ShapeStore().Table().NumRows())
306            self.layer.SetShapeStore(DerivedShapeStore(self.store, memtable))
307            # The classification should contain only the default group now.
308            self.assertEquals(self.layer.GetClassification().GetNumGroups(), 0)
309            self.check_messages([(self.layer, LAYER_CHANGED),
310                                 (self.layer, LAYER_SHAPESTORE_REPLACED)])
311    
312    
313  class TestLayerLegend(unittest.TestCase, support.SubscriberMixin):  class TestLayerLegend(unittest.TestCase, support.SubscriberMixin):
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