/[thuban]/branches/WIP-pyshapelib-bramz/test/test_layer.py
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revision 832 by jonathan, Tue May 6 12:07:36 2003 UTC revision 1262 by jonathan, Fri Jun 20 14:15:30 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.assertEquals(layer.GetProjection(), None)
81    
82            # set/get projection
83            proj = Projection(["proj=utm", "zone=26"])
84    
85            layer.SetProjection(proj)
86            self.failUnless(layer.GetProjection() is proj)
87    
88            # __init__ with other arguments
89            layer = BaseLayer("Test BaseLayer", False, proj)
90            self.failIf(layer.Visible())
91            self.failUnless(layer.GetProjection() is proj)
92    
93      def test_arc_layer(self):      def test_arc_layer(self):
94          """Test Layer with arc shapes"""          """Test Layer with arc shapes"""
95          filename = os.path.join("..", "Data", "iceland", "roads-line.shp")          layer = self.layer = Layer("Test Layer",
96          layer = Layer("Test Layer", self.session.OpenShapefile(filename))                                     self.open_shapefile("roads-line.shp"))
         self.assertEquals(layer.Title(), "Test Layer")  
97          self.assertEquals(layer.ShapeType(), SHAPETYPE_ARC)          self.assertEquals(layer.ShapeType(), SHAPETYPE_ARC)
98          self.assertEquals(layer.NumShapes(), 839)          self.assertEquals(layer.NumShapes(), 839)
99          shape = layer.Shape(32)          shape = layer.Shape(32)
# Line 81  class TestLayer(unittest.TestCase, suppo Line 124  class TestLayer(unittest.TestCase, suppo
124          self.assertEquals(layer.ShapesBoundingBox([]), None)          self.assertEquals(layer.ShapesBoundingBox([]), None)
125          self.assertEquals(layer.ShapesBoundingBox(None), None)          self.assertEquals(layer.ShapesBoundingBox(None), None)
126    
         layer.Destroy()  
   
127      def test_polygon_layer(self):      def test_polygon_layer(self):
128          """Test Layer with polygon shapes"""          """Test Layer with polygon shapes"""
129          filename = os.path.join("..", "Data", "iceland", "political.shp")          layer = self.layer = Layer("Test Layer",
130          layer = Layer("Test Layer", self.session.OpenShapefile(filename))                                     self.open_shapefile("political.shp"))
         self.assertEquals(layer.Title(), "Test Layer")  
131          self.assertEquals(layer.ShapeType(), SHAPETYPE_POLYGON)          self.assertEquals(layer.ShapeType(), SHAPETYPE_POLYGON)
132          self.assertEquals(layer.NumShapes(), 156)          self.assertEquals(layer.NumShapes(), 156)
133          shape = layer.Shape(4)          shape = layer.Shape(4)
# Line 101  class TestLayer(unittest.TestCase, suppo Line 141  class TestLayer(unittest.TestCase, suppo
141                                    -13.495815277099609, 66.563774108886719])                                    -13.495815277099609, 66.563774108886719])
142          self.assertEquals(layer.ShapesInRegion((-24.0, 64.0, -23.9, 64.1)),          self.assertEquals(layer.ShapesInRegion((-24.0, 64.0, -23.9, 64.1)),
143                            [91, 92, 144, 146, 148, 150, 152, 153])                            [91, 92, 144, 146, 148, 150, 152, 153])
         layer.Destroy()  
144    
145      def test_point_layer(self):      def test_point_layer(self):
146          """Test Layer with point shapes"""          """Test Layer with point shapes"""
147          filename = os.path.join("..", "Data", "iceland",          layer = self.layer = Layer("Test Layer",
148                                  "cultural_landmark-point.shp")                             self.open_shapefile("cultural_landmark-point.shp"))
         layer = Layer("Test Layer", self.session.OpenShapefile(filename))  
         self.assertEquals(layer.Title(), "Test Layer")  
149          self.assertEquals(layer.ShapeType(), SHAPETYPE_POINT)          self.assertEquals(layer.ShapeType(), SHAPETYPE_POINT)
150          self.assertEquals(layer.NumShapes(), 34)          self.assertEquals(layer.NumShapes(), 34)
151          shape = layer.Shape(0)          shape = layer.Shape(0)
# Line 119  class TestLayer(unittest.TestCase, suppo Line 156  class TestLayer(unittest.TestCase, suppo
156                                    -15.12291431427002, 66.36572265625])                                    -15.12291431427002, 66.36572265625])
157          self.assertEquals(layer.ShapesInRegion((-24.0, 64.0, -23.80, 64.1)),          self.assertEquals(layer.ShapesInRegion((-24.0, 64.0, -23.80, 64.1)),
158                            [0, 1, 2, 3, 4, 5, 27, 28, 29, 30, 31])                            [0, 1, 2, 3, 4, 5, 27, 28, 29, 30, 31])
         layer.Destroy()  
159    
160      def test_empty_layer(self):      def test_empty_layer(self):
161          """Test Layer with empty shape file"""          """Test Layer with empty shape file"""
# Line 134  class TestLayer(unittest.TestCase, suppo Line 170  class TestLayer(unittest.TestCase, suppo
170          dbf.add_field("NAME", dbflib.FTString, 20, 0)          dbf.add_field("NAME", dbflib.FTString, 20, 0)
171    
172          # Now try to open it.          # Now try to open it.
173          layer = Layer("Empty Layer",          layer = self.layer = Layer("Empty Layer",
174                        self.session.OpenShapefile(shapefilename))                                     self.session.OpenShapefile(shapefilename))
175          self.assertEquals(layer.BoundingBox(), None)          self.assertEquals(layer.BoundingBox(), None)
176          self.assertEquals(layer.LatLongBoundingBox(), None)          self.assertEquals(layer.LatLongBoundingBox(), None)
177          self.assertEquals(layer.NumShapes(), 0)          self.assertEquals(layer.NumShapes(), 0)
178          layer.Destroy()  
179        def test_get_field_type(self):
180            """Test Layer.GetFieldType()"""
181            layer = self.layer = Layer("Test Layer",
182                                       self.open_shapefile("roads-line.shp"))
183            self.assertEquals(layer.GetFieldType("LENGTH"), FIELDTYPE_DOUBLE)
184            self.assertEquals(layer.GetFieldType("non existing"), None)
185    
186        def test_raster_layer(self):
187            if not Thuban.Model.resource.has_gdal_support():
188                return
189    
190            filename = self.build_path("island.tif")
191            layer = RasterLayer("Test RasterLayer", filename)
192            self.assertEquals(layer.GetImageFilename(), filename)
193            self.assertFloatSeqEqual(layer.BoundingBox(),
194                                     [-24.5500000, 63.2833330,
195                                      -13.4916670, 66.5666670])
196            self.assertFloatSeqEqual(layer.LatLongBoundingBox(),
197                                     [-24.5500000, 63.2833330,
198                                      -13.4916670, 66.5666670])
199    
200        def test_derived_store(self):
201            """Test layer with derived store"""
202            layer = self.layer = Layer("Test Layer",
203                                       self.open_shapefile("roads-line.shp"))
204            try:
205                store = layer.ShapeStore()
206                derived = DerivedShapeStore(store, store.Table())
207                layer.SetShapeStore(derived)
208                self.assert_(layer.ShapeStore() is derived)
209    
210                # check that an exception is raised when the number
211                # of shapes differ from the number of rows in a table.
212                layer2 = Layer("Test Layer",
213                               self.open_shapefile("political.shp"))
214                store2 = layer2.ShapeStore()
215                self.assertRaises(ValueError,
216                                  DerivedShapeStore, store2, store.Table())
217    
218            finally:
219                store = derived = None
220                layer2.Destroy()
221                store2 = None
222    
223    
224    class SetShapeStoreTests(unittest.TestCase, support.SubscriberMixin):
225    
226        def setUp(self):
227            """Create a layer with a classification as self.layer"""
228            self.clear_messages()
229            self.session = Session("Test session for %s" % self.__class__)
230            self.shapefilename = os.path.join("..", "Data", "iceland",
231                                              "cultural_landmark-point.dbf")
232            self.store = self.session.OpenShapefile(self.shapefilename)
233            self.layer = Layer("test layer", self.store)
234            self.classification = Classification(field = "CLPTLABEL")
235            self.classification.AppendGroup(ClassGroupSingleton("FARM"))
236            self.layer.SetClassification(self.classification)
237            self.layer.UnsetModified()
238            self.layer.Subscribe(LAYER_SHAPESTORE_REPLACED,
239                                 self.subscribe_with_params,
240                                 LAYER_SHAPESTORE_REPLACED)
241            self.layer.Subscribe(LAYER_CHANGED,
242                                 self.subscribe_with_params, LAYER_CHANGED)
243    
244        def tearDown(self):
245            self.clear_messages()
246            self.layer.Destroy()
247            self.session.Destroy()
248            self.session = self.layer = self.store = self.classification = None
249    
250        def test_sanity(self):
251            """SetShapeStoreTests sanity check
252    
253            Test the initial state of the test case instances after setUp.
254            """
255            cls = self.layer.GetClassification()
256            self.assert_(cls is self.classification)
257            self.assertEquals(cls.GetField(), "CLPTLABEL")
258            self.assertEquals(cls.GetFieldType(), FIELDTYPE_STRING)
259            self.assertEquals(self.layer.GetClassification().GetNumGroups(), 1)
260            self.failIf(self.layer.WasModified())
261    
262        def test_set_shape_store_modified_flag(self):
263            """Test whether Layer.SetShapeStore() sets the modified flag"""
264            memtable = MemoryTable([("FOO", FIELDTYPE_STRING)],
265                          [("bla",)] * self.layer.ShapeStore().Table().NumRows())
266            self.layer.SetShapeStore(DerivedShapeStore(self.store, memtable))
267    
268            self.assert_(self.layer.WasModified())
269    
270        def test_set_shape_store_different_field_name(self):
271            """Test Layer.SetShapeStore() with different column name"""
272            memtable = MemoryTable([("FOO", FIELDTYPE_STRING)],
273                          [("bla",)] * self.layer.ShapeStore().Table().NumRows())
274            self.layer.SetShapeStore(DerivedShapeStore(self.store, memtable))
275            # The classification should contain only the default group now.
276            self.assertEquals(self.layer.GetClassification().GetNumGroups(), 0)
277            self.check_messages([(self.layer, LAYER_CHANGED),
278                                 (self.layer, LAYER_SHAPESTORE_REPLACED)])
279    
280        def test_set_shape_store_same_field(self):
281            """Test Layer.SetShapeStore() with same column name and type"""
282            memtable = MemoryTable([("CLPTLABEL", FIELDTYPE_STRING)],
283                          [("bla",)] * self.layer.ShapeStore().Table().NumRows())
284            self.layer.SetShapeStore(DerivedShapeStore(self.store, memtable))
285            # The classification should be the same as before
286            self.assert_(self.layer.GetClassification() is self.classification)
287            self.check_messages([(self.layer, LAYER_SHAPESTORE_REPLACED)])
288    
289        def test_set_shape_store_same_field_different_type(self):
290            """Test Layer.SetShapeStore() with same column name but different type
291            """
292            memtable = MemoryTable([("CLPTLABEL", FIELDTYPE_DOUBLE)],
293                          [(0.0,)] * self.layer.ShapeStore().Table().NumRows())
294            self.layer.SetShapeStore(DerivedShapeStore(self.store, memtable))
295            # The classification should contain only the default group now.
296            self.assertEquals(self.layer.GetClassification().GetNumGroups(), 0)
297            self.check_messages([(self.layer, LAYER_CHANGED),
298                                 (self.layer, LAYER_SHAPESTORE_REPLACED)])
299    
300    
301  class TestLayerLegend(unittest.TestCase, support.SubscriberMixin):  class TestLayerLegend(unittest.TestCase, support.SubscriberMixin):
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