WIP-pyshapelib-bramz/test/test_transientdb.py

# Copyright (c) 2002, 2003 by Intevation GmbH
# Authors:
# Bernhard Herzog <[email protected]>
#
# This program is free software under the GPL (>=v2)
# Read the file COPYING coming with Thuban for details.

"""
Test the Transient DB classes
"""

__version__ = "$Revision$"
# $Source$
# $Id$

import os
import unittest

import support
support.initthuban()

from Thuban.Model.table import DBFTable, MemoryTable, FIELDTYPE_STRING, \
                               FIELDTYPE_INT, FIELDTYPE_DOUBLE
from Thuban.Model.transientdb import TransientDatabase, TransientTable, \
     TransientJoinedTable, AutoTransientTable


class TestTransientTable(unittest.TestCase, support.FileTestMixin):

    def setUp(self):
        """Create a transient database as self.transientdb"""
        filename = self.temp_file_name("transient_table.sqlite")
        if os.path.exists(filename):
            os.remove(filename)
        journal = filename + "-journal"
        if os.path.exists(journal):
            print "removing journal", journal
            os.remove(journal)
        self.transientdb = TransientDatabase(filename)

    def tearDown(self):
        self.transientdb.close()

    def run_iceland_political_tests(self, table):
        """Run some tests on tablte

        Assume that table holds the data of the file
        ../Data/iceland/political.dbf sample file.
        """
        self.assertEquals(table.NumRows(), 156)
        self.assertEquals(table.NumColumns(), 8)

        # Check one each of the possible field types.
        columns = table.Columns()
        self.assertEquals(columns[0].name, 'AREA')
        self.assertEquals(columns[0].type, FIELDTYPE_DOUBLE)
        self.assertEquals(columns[3].name, 'PONET_ID')
        self.assertEquals(columns[3].type, FIELDTYPE_INT)
        self.assertEquals(columns[6].name, 'POPYCOUN')
        self.assertEquals(columns[6].type, FIELDTYPE_STRING)

        # HasColumn
        self.failUnless(table.HasColumn("AREA"))
        self.failUnless(table.HasColumn(1))
        # HasColumn for non-exisiting columns
        self.failIf(table.HasColumn("non_existing_name"))
        self.failIf(table.HasColumn(100))

        # Reading rows and values.
        self.assertEquals(table.ReadRowAsDict(144),
                          {'POPYCOUN': 'IC', 'POPYADMIN': '', 'PONET_': 146,
                           'AREA': 19.462,
                           'POPYTYPE': 1, 'PERIMETER': 88.518000000000001,
                           'POPYREG': '1',
                           'PONET_ID': 145})
        self.assertEquals(table.ReadValue(144, "AREA"), 19.462)
        self.assertEquals(table.ReadValue(144, 3), 145)

        # ValueRange may induce a copy to the transient database.
        # Therefore we put it last so that we can execute this method
        # twice to check whether the other methods still work after the
        # copy
        self.assertEquals(table.ValueRange("AREA"), (0.0, 19.462))

        unique = table.UniqueValues("PONET_ID")
        unique.sort()
        self.assertEquals(unique, range(1, 157))

    def test_transient_table(self):
        """Test TransientTable(dbftable)

        The TransientTable should copy the data to the
        TransientDatabase.
        """
        orig_table = DBFTable(os.path.join("..", "Data", "iceland",
                                           "political.dbf"))
        table = TransientTable(self.transientdb, orig_table)
        self.run_iceland_political_tests(table)

        # The transient_table method should return the table itself
        self.assert_(table is table.transient_table())

        # The title is simply copied over from the original table
        self.assertEquals(table.Title(), orig_table.Title())

        # The TransientTable class itself doesn't implement the
        # Dependencies method, so we don't test it.


    def test_auto_transient_table(self):
        """Test AutoTransientTable(dbftable)

        The AutoTransientTable should copy the data to the
        TransientDatabase on demand.
        """
        orig_table = DBFTable(os.path.join("..", "Data", "iceland",
                                           "political.dbf"))
        table = AutoTransientTable(self.transientdb, orig_table)

        # Run the tests twice so that we execute them once when the data
        # has not been copied to the transient db yet and once when it
        # has. This assumes that run_iceland_political_tests does at
        # least one call to a method that copies to the transient db at
        # its end.
        self.run_iceland_political_tests(table)
        self.run_iceland_political_tests(table)

    def test_auto_transient_table_query(self):
        """Test AutoTransientTable.SimpleQuery()"""
        orig_table = DBFTable(os.path.join("..", "Data", "iceland",
                                           "political.dbf"))
        table = AutoTransientTable(self.transientdb, orig_table)
        # Only a simple test here. The AutoTransientTable simply
        # delegates to its transient table so it should be OK that the
        # real test for it is in test_transient_table_query. However,
        # it's important to check that the column handling works
        # correctly because the AutoTransientTable and it's underlying
        # transient table use different column object types.
        self.assertEquals(table.SimpleQuery(table.Column("AREA"), ">", 10.0),
                          [144])

        # test using a Column object as the right parameter
        self.assertEquals(table.SimpleQuery(table.Column("POPYTYPE"),
                                            "==",
                                            table.Column("POPYREG")),
                          range(156))

    def test_auto_transient_table_dependencies(self):
        """Test AutoTransientTable.Dependencies()"""
        orig_table = DBFTable(os.path.join("..", "Data", "iceland",
                                           "political.dbf"))
        table = AutoTransientTable(self.transientdb, orig_table)
        self.assertEquals(table.Dependencies(), (orig_table,))

    def test_auto_transient_table_title(self):
        """Test AutoTransientTable.Title()"""
        orig_table = DBFTable(os.path.join("..", "Data", "iceland",
                                           "political.dbf"))
        table = AutoTransientTable(self.transientdb, orig_table)
        # The title is of course the same as that of the original table
        self.assertEquals(table.Title(), orig_table.Title())

    def test_transient_joined_table(self):
        """Test TransientJoinedTable"""
        simple = MemoryTable([("type", FIELDTYPE_STRING),
                              ("code", FIELDTYPE_INT)],
                             [("OTHER/UNKNOWN", 0),
                              ("RUINS", 1),
                              ("FARM", 2),
                              ("BUILDING", 3),
                              ("HUT", 4),
                              ("LIGHTHOUSE", 5)])
        auto = AutoTransientTable(self.transientdb, simple)
        filename = os.path.join("..", "Data", "iceland",
                                "cultural_landmark-point.dbf")
        landmarks = AutoTransientTable(self.transientdb, DBFTable(filename))

        table = TransientJoinedTable(self.transientdb, landmarks, "CLPTLABEL",
                                     auto, "type")

        self.assertEquals(table.NumRows(), 34)
        self.assertEquals(table.NumColumns(), 8)
        self.assertEquals(table.Column(0).type, FIELDTYPE_DOUBLE)
        self.assertEquals(table.Column(0).name, 'AREA')
        self.assertEquals(table.Column(7).type, FIELDTYPE_INT)
        self.assertEquals(table.Column(7).name, 'code')
        self.assertEquals(table.Column(4).type, FIELDTYPE_STRING)
        self.assertEquals(table.Column(4).name, 'CLPTLABEL')
        # HasColumn
        self.failUnless(table.HasColumn("AREA"))
        self.failUnless(table.HasColumn(1))
        # HasColumn for non-exisiting columns
        self.failIf(table.HasColumn("non_existing_name"))
        self.failIf(table.HasColumn(100))

        # Reading rows and values
        self.assertEquals(table.ReadRowAsDict(22),
                          {'PERIMETER': 0.0, 'CLPOINT_': 23,
                           'AREA': 0.0, 'CLPTLABEL': 'RUINS',
                           'CLPOINT_ID': 38, 'CLPTFLAG': 0,
                           'code': 1, 'type': 'RUINS'})
        self.assertEquals(table.ReadValue(22, "type"), 'RUINS')
        self.assertEquals(table.ReadValue(22, 7), 1)

        # The transient_table method should return the table itself
        self.assert_(table is table.transient_table())

        # The TransientJoinedTable depends on both input tables
        self.assertEquals(table.Dependencies(), (landmarks, auto))

        # The title is constructed from the titles of the input tables.
        self.assertEquals(table.Title(),
                          "Join of %s and %s" % (landmarks.Title(),
                                                 auto.Title()))


    def test_transient_joined_table_same_column_name(self):
        """Test TransientJoinedTable join on columns with same name

        The transient DB maps the column names used by the tables to
        another set of names used only inside the SQLite database. There
        was a bug in the way this mapping was used when joining on
        fields with the same names in both tables so that the joined
        table ended up joining on the same column in the same table.
        """
        mem_stretches = MemoryTable([("stretch_id", FIELDTYPE_INT)],
                                    [(i,) for i in range(4)])
        stretches = AutoTransientTable(self.transientdb, mem_stretches)

        mem_discharges = MemoryTable([("disch_id", FIELDTYPE_INT),
                                      ("stretch_id", FIELDTYPE_INT)],
                                     [(1, 0), (2, 3)])
        discharges = AutoTransientTable(self.transientdb, mem_discharges)

        table = TransientJoinedTable(self.transientdb, stretches, "stretch_id",
                                     discharges, "stretch_id",
                                     outer_join = True)

        self.assertEquals(table.NumRows(), 4)
        self.assertEquals(table.NumColumns(), 2)

        # HasColumn
        self.failUnless(table.HasColumn("stretch_id"))
        self.failUnless(table.HasColumn("disch_id"))


    def test_transient_table_read_twice(self):
        """Test TransientTable.ReadRowAsDict() reading the same record twice"""
        simple = MemoryTable([("type", FIELDTYPE_STRING),
                              ("code", FIELDTYPE_INT)],
                             [("OTHER/UNKNOWN", 0),
                              ("RUINS", 1),
                              ("FARM", 2),
                              ("BUILDING", 3),
                              ("HUT", 4),
                              ("LIGHTHOUSE", 5)])
        table = TransientTable(self.transientdb, simple)

        # There was a bug where reading the same record twice would
        # raise an exception in the second call because of an
        # unitialized local variable, so for passing the test it's
        # enough if reading simply succeeds. OTOH, while we're at it we
        # might as well check whether the results are equal anyway :)
        result1 = table.ReadRowAsDict(3)
        result2 = table.ReadRowAsDict(3)
        self.assertEquals(result1, result2)


    def test_transient_table_query(self):
        """Test TransientTable.SimpleQuery()"""
        simple = MemoryTable([("type", FIELDTYPE_STRING),
                              ("value", FIELDTYPE_DOUBLE),
                              ("code", FIELDTYPE_INT)],
                             [("OTHER/UNKNOWN", -1.5, 11),
                              ("RUINS", 0.0, 1),
                              ("FARM", 3.141, 2),
                              ("BUILDING", 2.5, 3),
                              ("HUT", 1e6, 4),
                              ("LIGHTHOUSE", -0.01, 5)])
        table = TransientTable(self.transientdb, simple)

        # A column and a value
        self.assertEquals(table.SimpleQuery(table.Column(0), "==", "RUINS"),
                          [1])
        self.assertEquals(table.SimpleQuery(table.Column(2), "!=", 2),
                          [0, 1, 3, 4, 5])
        self.assertEquals(table.SimpleQuery(table.Column(1), "<", 1.0),
                          [0, 1, 5])
        self.assertEquals(table.SimpleQuery(table.Column(1), "<=", -1.5),
                          [0])
        self.assertEquals(table.SimpleQuery(table.Column(2), ">", 3),
                          [0, 4, 5])
        self.assertEquals(table.SimpleQuery(table.Column(2), ">=", 3),
                          [0, 3, 4, 5])

        # Two columns as operands
        self.assertEquals(table.SimpleQuery(table.Column(1),
                                            "<=", table.Column(2)),
                          [0, 1, 3, 5])

        # Test whether invalid operators raise a ValueError
        self.assertRaises(ValueError,
                          table.SimpleQuery,
                          table.Column(1), "<<", table.Column(2))


if __name__ == "__main__":
    support.run_tests()
1	bh	765	# Copyright (c) 2002, 2003 by Intevation GmbH
2			# Authors:
3			# Bernhard Herzog <[email protected]>
4			#
5			# This program is free software under the GPL (>=v2)
6			# Read the file COPYING coming with Thuban for details.
7
8			"""
9			Test the Transient DB classes
10			"""
11
12			__version__ = "$Revision$"
13			# $Source$
14			# $Id$
15
16			import os
17			import unittest
18
19			import support
20			support.initthuban()
21
22	jan	805	from Thuban.Model.table import DBFTable, MemoryTable, FIELDTYPE_STRING, \
23	bh	839	FIELDTYPE_INT, FIELDTYPE_DOUBLE
24	bh	765	from Thuban.Model.transientdb import TransientDatabase, TransientTable, \
25			TransientJoinedTable, AutoTransientTable
26
27
28			class TestTransientTable(unittest.TestCase, support.FileTestMixin):
29
30			def setUp(self):
31			"""Create a transient database as self.transientdb"""
32			filename = self.temp_file_name("transient_table.sqlite")
33			if os.path.exists(filename):
34			os.remove(filename)
35			journal = filename + "-journal"
36			if os.path.exists(journal):
37			print "removing journal", journal
38			os.remove(journal)
39			self.transientdb = TransientDatabase(filename)
40
41			def tearDown(self):
42			self.transientdb.close()
43
44			def run_iceland_political_tests(self, table):
45			"""Run some tests on tablte
46
47			Assume that table holds the data of the file
48			../Data/iceland/political.dbf sample file.
49			"""
50	bh	818	self.assertEquals(table.NumRows(), 156)
51			self.assertEquals(table.NumColumns(), 8)
52	bh	765
53	bh	1041	# Check one each of the possible field types.
54	bh	818	columns = table.Columns()
55			self.assertEquals(columns[0].name, 'AREA')
56	bh	839	self.assertEquals(columns[0].type, FIELDTYPE_DOUBLE)
57	bh	818	self.assertEquals(columns[3].name, 'PONET_ID')
58	bh	839	self.assertEquals(columns[3].type, FIELDTYPE_INT)
59	bh	818	self.assertEquals(columns[6].name, 'POPYCOUN')
60	bh	839	self.assertEquals(columns[6].type, FIELDTYPE_STRING)
61	bh	765
62	bh	839	# HasColumn
63			self.failUnless(table.HasColumn("AREA"))
64			self.failUnless(table.HasColumn(1))
65			# HasColumn for non-exisiting columns
66			self.failIf(table.HasColumn("non_existing_name"))
67			self.failIf(table.HasColumn(100))
68
69	bh	849	# Reading rows and values.
70	bh	818	self.assertEquals(table.ReadRowAsDict(144),
71	bh	765	{'POPYCOUN': 'IC', 'POPYADMIN': '', 'PONET_': 146,
72			'AREA': 19.462,
73			'POPYTYPE': 1, 'PERIMETER': 88.518000000000001,
74			'POPYREG': '1',
75			'PONET_ID': 145})
76	bh	849	self.assertEquals(table.ReadValue(144, "AREA"), 19.462)
77			self.assertEquals(table.ReadValue(144, 3), 145)
78	bh	765
79	bh	839	# ValueRange may induce a copy to the transient database.
80	bh	765	# Therefore we put it last so that we can execute this method
81			# twice to check whether the other methods still work after the
82			# copy
83	bh	818	self.assertEquals(table.ValueRange("AREA"), (0.0, 19.462))
84	bh	765
85	bh	818	unique = table.UniqueValues("PONET_ID")
86	bh	765	unique.sort()
87			self.assertEquals(unique, range(1, 157))
88
89			def test_transient_table(self):
90			"""Test TransientTable(dbftable)
91
92			The TransientTable should copy the data to the
93			TransientDatabase.
94			"""
95			orig_table = DBFTable(os.path.join("..", "Data", "iceland",
96			"political.dbf"))
97			table = TransientTable(self.transientdb, orig_table)
98			self.run_iceland_political_tests(table)
99
100			# The transient_table method should return the table itself
101			self.assert_(table is table.transient_table())
102
103	bh	998	# The title is simply copied over from the original table
104			self.assertEquals(table.Title(), orig_table.Title())
105
106	bh	984	# The TransientTable class itself doesn't implement the
107			# Dependencies method, so we don't test it.
108	bh	765
109	bh	984
110	bh	765	def test_auto_transient_table(self):
111			"""Test AutoTransientTable(dbftable)
112
113			The AutoTransientTable should copy the data to the
114			TransientDatabase on demand.
115			"""
116			orig_table = DBFTable(os.path.join("..", "Data", "iceland",
117			"political.dbf"))
118			table = AutoTransientTable(self.transientdb, orig_table)
119
120			# Run the tests twice so that we execute them once when the data
121			# has not been copied to the transient db yet and once when it
122			# has. This assumes that run_iceland_political_tests does at
123			# least one call to a method that copies to the transient db at
124			# its end.
125			self.run_iceland_political_tests(table)
126			self.run_iceland_political_tests(table)
127
128	bh	845	def test_auto_transient_table_query(self):
129			"""Test AutoTransientTable.SimpleQuery()"""
130			orig_table = DBFTable(os.path.join("..", "Data", "iceland",
131			"political.dbf"))
132			table = AutoTransientTable(self.transientdb, orig_table)
133	jonathan	948	# Only a simple test here. The AutoTransientTable simply
134	bh	845	# delegates to its transient table so it should be OK that the
135			# real test for it is in test_transient_table_query. However,
136			# it's important to check that the column handling works
137			# correctly because the AutoTransientTable and it's underlying
138			# transient table use different column object types.
139			self.assertEquals(table.SimpleQuery(table.Column("AREA"), ">", 10.0),
140			[144])
141	bh	765
142	jonathan	948	# test using a Column object as the right parameter
143	bh	984	self.assertEquals(table.SimpleQuery(table.Column("POPYTYPE"),
144	jonathan	948	"==",
145			table.Column("POPYREG")),
146			range(156))
147
148	bh	984	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	bh	998	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	bh	765	def test_transient_joined_table(self):
164			"""Test TransientJoinedTable"""
165	jan	805	simple = MemoryTable([("type", FIELDTYPE_STRING),
166	bh	765	("code", FIELDTYPE_INT)],
167			[("OTHER/UNKNOWN", 0),
168			("RUINS", 1),
169			("FARM", 2),
170			("BUILDING", 3),
171			("HUT", 4),
172			("LIGHTHOUSE", 5)])
173			auto = AutoTransientTable(self.transientdb, simple)
174			filename = os.path.join("..", "Data", "iceland",
175			"cultural_landmark-point.dbf")
176			landmarks = AutoTransientTable(self.transientdb, DBFTable(filename))
177
178			table = TransientJoinedTable(self.transientdb, landmarks, "CLPTLABEL",
179			auto, "type")
180
181	bh	818	self.assertEquals(table.NumRows(), 34)
182			self.assertEquals(table.NumColumns(), 8)
183	bh	839	self.assertEquals(table.Column(0).type, FIELDTYPE_DOUBLE)
184			self.assertEquals(table.Column(0).name, 'AREA')
185			self.assertEquals(table.Column(7).type, FIELDTYPE_INT)
186			self.assertEquals(table.Column(7).name, 'code')
187			self.assertEquals(table.Column(4).type, FIELDTYPE_STRING)
188			self.assertEquals(table.Column(4).name, 'CLPTLABEL')
189			# HasColumn
190			self.failUnless(table.HasColumn("AREA"))
191			self.failUnless(table.HasColumn(1))
192			# HasColumn for non-exisiting columns
193			self.failIf(table.HasColumn("non_existing_name"))
194			self.failIf(table.HasColumn(100))
195	bh	765
196	bh	849	# Reading rows and values
197	bh	839	self.assertEquals(table.ReadRowAsDict(22),
198	bh	765	{'PERIMETER': 0.0, 'CLPOINT_': 23,
199			'AREA': 0.0, 'CLPTLABEL': 'RUINS',
200			'CLPOINT_ID': 38, 'CLPTFLAG': 0,
201			'code': 1, 'type': 'RUINS'})
202	bh	849	self.assertEquals(table.ReadValue(22, "type"), 'RUINS')
203			self.assertEquals(table.ReadValue(22, 7), 1)
204	bh	765
205			# The transient_table method should return the table itself
206			self.assert_(table is table.transient_table())
207
208	bh	984	# The TransientJoinedTable depends on both input tables
209			self.assertEquals(table.Dependencies(), (landmarks, auto))
210	bh	765
211	bh	998	# 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	bh	984
216	bh	998
217	bh	1328	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	bh	785	def test_transient_table_read_twice(self):
248	bh	842	"""Test TransientTable.ReadRowAsDict() reading the same record twice"""
249	jan	805	simple = MemoryTable([("type", FIELDTYPE_STRING),
250	bh	785	("code", FIELDTYPE_INT)],
251			[("OTHER/UNKNOWN", 0),
252			("RUINS", 1),
253			("FARM", 2),
254			("BUILDING", 3),
255			("HUT", 4),
256			("LIGHTHOUSE", 5)])
257			table = TransientTable(self.transientdb, simple)
258	bh	765
259	bh	785	# There was a bug where reading the same record twice would
260			# raise an exception in the second call because of an
261			# unitialized local variable, so for passing the test it's
262			# enough if reading simply succeeds. OTOH, while we're at it we
263			# might as well check whether the results are equal anyway :)
264	bh	839	result1 = table.ReadRowAsDict(3)
265			result2 = table.ReadRowAsDict(3)
266	bh	785	self.assertEquals(result1, result2)
267
268	bh	818
269	bh	842	def test_transient_table_query(self):
270			"""Test TransientTable.SimpleQuery()"""
271			simple = MemoryTable([("type", FIELDTYPE_STRING),
272			("value", FIELDTYPE_DOUBLE),
273			("code", FIELDTYPE_INT)],
274			[("OTHER/UNKNOWN", -1.5, 11),
275			("RUINS", 0.0, 1),
276			("FARM", 3.141, 2),
277			("BUILDING", 2.5, 3),
278			("HUT", 1e6, 4),
279			("LIGHTHOUSE", -0.01, 5)])
280			table = TransientTable(self.transientdb, simple)
281
282			# A column and a value
283			self.assertEquals(table.SimpleQuery(table.Column(0), "==", "RUINS"),
284			[1])
285			self.assertEquals(table.SimpleQuery(table.Column(2), "!=", 2),
286			[0, 1, 3, 4, 5])
287			self.assertEquals(table.SimpleQuery(table.Column(1), "<", 1.0),
288			[0, 1, 5])
289			self.assertEquals(table.SimpleQuery(table.Column(1), "<=", -1.5),
290			[0])
291			self.assertEquals(table.SimpleQuery(table.Column(2), ">", 3),
292			[0, 4, 5])
293			self.assertEquals(table.SimpleQuery(table.Column(2), ">=", 3),
294			[0, 3, 4, 5])
295
296			# Two columns as operands
297			self.assertEquals(table.SimpleQuery(table.Column(1),
298			"<=", table.Column(2)),
299			[0, 1, 3, 5])
300
301			# Test whether invalid operators raise a ValueError
302			self.assertRaises(ValueError,
303			table.SimpleQuery,
304			table.Column(1), "<<", table.Column(2))
305
306
307	bh	765	if __name__ == "__main__":
308			support.run_tests()
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