/[thuban]/branches/WIP-pyshapelib-bramz/test/test_transientdb.py
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revision 849 by bh, Wed May 7 11:55:31 2003 UTC revision 1332 by frank, Tue Jul 1 15:40:52 2003 UTC
# Line 50  class TestTransientTable(unittest.TestCa Line 50  class TestTransientTable(unittest.TestCa
50          self.assertEquals(table.NumRows(), 156)          self.assertEquals(table.NumRows(), 156)
51          self.assertEquals(table.NumColumns(), 8)          self.assertEquals(table.NumColumns(), 8)
52    
53          # Check one each of the possible field types. The width and          # Check one each of the possible field types.
         # decimal precision is always 0.  
54          columns = table.Columns()          columns = table.Columns()
55          self.assertEquals(columns[0].name, 'AREA')          self.assertEquals(columns[0].name, 'AREA')
56          self.assertEquals(columns[0].type, FIELDTYPE_DOUBLE)          self.assertEquals(columns[0].type, FIELDTYPE_DOUBLE)
# Line 101  class TestTransientTable(unittest.TestCa Line 100  class TestTransientTable(unittest.TestCa
100          # The transient_table method should return the table itself          # The transient_table method should return the table itself
101          self.assert_(table is table.transient_table())          self.assert_(table is table.transient_table())
102    
103            # The title is simply copied over from the original table
104            self.assertEquals(table.Title(), orig_table.Title())
105    
106            # The TransientTable class itself doesn't implement the
107            # Dependencies method, so we don't test it.
108    
109    
110      def test_auto_transient_table(self):      def test_auto_transient_table(self):
111          """Test AutoTransientTable(dbftable)          """Test AutoTransientTable(dbftable)
# Line 125  class TestTransientTable(unittest.TestCa Line 130  class TestTransientTable(unittest.TestCa
130          orig_table = DBFTable(os.path.join("..", "Data", "iceland",          orig_table = DBFTable(os.path.join("..", "Data", "iceland",
131                                             "political.dbf"))                                             "political.dbf"))
132          table = AutoTransientTable(self.transientdb, orig_table)          table = AutoTransientTable(self.transientdb, orig_table)
133          # Only a simple test here. The AutoTransientTable siply          # Only a simple test here. The AutoTransientTable simply
134          # delegates to its transient table so it should be OK that the          # delegates to its transient table so it should be OK that the
135          # real test for it is in test_transient_table_query. However,          # real test for it is in test_transient_table_query. However,
136          # it's important to check that the column handling works          # it's important to check that the column handling works
# Line 134  class TestTransientTable(unittest.TestCa Line 139  class TestTransientTable(unittest.TestCa
139          self.assertEquals(table.SimpleQuery(table.Column("AREA"), ">", 10.0),          self.assertEquals(table.SimpleQuery(table.Column("AREA"), ">", 10.0),
140                            [144])                            [144])
141    
142            # test using a Column object as the right parameter
143            self.assertEquals(table.SimpleQuery(table.Column("POPYTYPE"),
144                                                "==",
145                                                table.Column("POPYREG")),
146                              range(156))
147    
148        def test_auto_transient_table_dependencies(self):
149            """Test AutoTransientTable.Dependencies()"""
150            orig_table = DBFTable(os.path.join("..", "Data", "iceland",
151                                               "political.dbf"))
152            table = AutoTransientTable(self.transientdb, orig_table)
153            self.assertEquals(table.Dependencies(), (orig_table,))
154    
155        def test_auto_transient_table_title(self):
156            """Test AutoTransientTable.Title()"""
157            orig_table = DBFTable(os.path.join("..", "Data", "iceland",
158                                               "political.dbf"))
159            table = AutoTransientTable(self.transientdb, orig_table)
160            # The title is of course the same as that of the original table
161            self.assertEquals(table.Title(), orig_table.Title())
162    
163      def test_transient_joined_table(self):      def test_transient_joined_table(self):
164          """Test TransientJoinedTable"""          """Test TransientJoinedTable"""
165          simple = MemoryTable([("type", FIELDTYPE_STRING),          simple = MemoryTable([("type", FIELDTYPE_STRING),
# Line 179  class TestTransientTable(unittest.TestCa Line 205  class TestTransientTable(unittest.TestCa
205          # The transient_table method should return the table itself          # The transient_table method should return the table itself
206          self.assert_(table is table.transient_table())          self.assert_(table is table.transient_table())
207    
208            # The TransientJoinedTable depends on both input tables
209            self.assertEquals(table.Dependencies(), (landmarks, auto))
210    
211            # The title is constructed from the titles of the input tables.
212            self.assertEquals(table.Title(),
213                              "Join of %s and %s" % (landmarks.Title(),
214                                                     auto.Title()))
215    
216    
217        def test_transient_joined_table_same_column_name(self):
218            """Test TransientJoinedTable join on columns with same name
219    
220            The transient DB maps the column names used by the tables to
221            another set of names used only inside the SQLite database. There
222            was a bug in the way this mapping was used when joining on
223            fields with the same names in both tables so that the joined
224            table ended up joining on the same column in the same table.
225            """
226            mem_stretches = MemoryTable([("stretch_id", FIELDTYPE_INT)],
227                                        [(i,) for i in range(4)])
228            stretches = AutoTransientTable(self.transientdb, mem_stretches)
229    
230            mem_discharges = MemoryTable([("disch_id", FIELDTYPE_INT),
231                                          ("stretch_id", FIELDTYPE_INT)],
232                                         [(1, 0), (2, 3)])
233            discharges = AutoTransientTable(self.transientdb, mem_discharges)
234    
235            table = TransientJoinedTable(self.transientdb, stretches, "stretch_id",
236                                         discharges, "stretch_id",
237                                         outer_join = True)
238    
239            self.assertEquals(table.NumRows(), 4)
240            self.assertEquals(table.NumColumns(), 2)
241    
242            # HasColumn
243            self.failUnless(table.HasColumn("stretch_id"))
244            self.failUnless(table.HasColumn("disch_id"))
245    
246    
247        def test_transient_joined_table_with_equal_column_names(self):
248            """Test TransientJoinedTable join on tables with equal column names
249    
250            The join of two tables contains all fields from both tables instead
251            th field the join was performed on. This special field is included
252            once. If a name collision occurs for the field names, underscores are
253            appended as long as any collision is resolved.      
254            """
255            mem_stretches = MemoryTable([("stretch_id", FIELDTYPE_INT),
256                                         ("name", FIELDTYPE_INT)],
257                                        [(0, 10), (1, 11), (2, 12), (3, 13) ])
258            stretches = AutoTransientTable(self.transientdb, mem_stretches)
259    
260            mem_discharges = MemoryTable([("disch_id", FIELDTYPE_INT),
261                                          ("stretch_id", FIELDTYPE_INT),
262                                          ("name", FIELDTYPE_INT)],
263                                         [(1, 0, 1), (2, 3, 2)])
264            discharges = AutoTransientTable(self.transientdb, mem_discharges)
265    
266            table = TransientJoinedTable(self.transientdb, stretches, "stretch_id",
267                                         discharges, "stretch_id",
268                                         outer_join = True)
269    
270            self.assertEquals(table.NumRows(), 4)
271            self.assertEquals(table.NumColumns(), 4)
272    
273            # HasColumn
274            self.failUnless(table.HasColumn("stretch_id"))
275            self.failUnless(table.HasColumn("disch_id"))
276            self.failUnless(table.HasColumn("name"))
277            self.failUnless(table.HasColumn("name_"))
278    
279    
280      def test_transient_table_read_twice(self):      def test_transient_table_read_twice(self):
281          """Test TransientTable.ReadRowAsDict() reading the same record twice"""          """Test TransientTable.ReadRowAsDict() reading the same record twice"""
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