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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 Transient DB classes |
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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 dbflib |
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from Thuban.Model.table import DBFTable, MemoryTable, FIELDTYPE_STRING, \ |
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FIELDTYPE_INT, FIELDTYPE_DOUBLE, table_to_dbf |
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from Thuban.Model.transientdb import TransientDatabase, TransientTable, \ |
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TransientJoinedTable, AutoTransientTable |
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|
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|
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class TestTransientTable(unittest.TestCase, support.FileTestMixin): |
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|
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def setUp(self): |
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"""Create a transient database as self.transientdb""" |
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filename = self.temp_file_name("transient_table.sqlite") |
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if os.path.exists(filename): |
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os.remove(filename) |
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journal = filename + "-journal" |
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if os.path.exists(journal): |
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print "removing journal", journal |
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os.remove(journal) |
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self.transientdb = TransientDatabase(filename) |
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|
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def tearDown(self): |
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self.transientdb.close() |
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|
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def run_iceland_political_tests(self, table): |
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"""Run some tests on tablte |
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|
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Assume that table holds the data of the file |
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../Data/iceland/political.dbf sample file. |
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""" |
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self.assertEquals(table.NumRows(), 156) |
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self.assertEquals(table.NumColumns(), 8) |
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|
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# Check one each of the possible field types. |
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columns = table.Columns() |
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self.assertEquals(columns[0].name, 'AREA') |
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self.assertEquals(columns[0].type, FIELDTYPE_DOUBLE) |
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self.assertEquals(columns[3].name, 'PONET_ID') |
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self.assertEquals(columns[3].type, FIELDTYPE_INT) |
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self.assertEquals(columns[6].name, 'POPYCOUN') |
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self.assertEquals(columns[6].type, FIELDTYPE_STRING) |
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|
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# HasColumn |
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self.failUnless(table.HasColumn("AREA")) |
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self.failUnless(table.HasColumn(1)) |
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# HasColumn for non-exisiting columns |
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self.failIf(table.HasColumn("non_existing_name")) |
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self.failIf(table.HasColumn(100)) |
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|
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# Reading rows and values. |
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self.assertEquals(table.ReadRowAsDict(144), |
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{'POPYCOUN': 'IC', 'POPYADMIN': '', 'PONET_': 146, |
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'AREA': 19.462, |
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'POPYTYPE': 1, 'PERIMETER': 88.518000000000001, |
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'POPYREG': '1', |
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'PONET_ID': 145}) |
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self.assertEquals(table.ReadValue(144, "AREA"), 19.462) |
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self.assertEquals(table.ReadValue(144, 3), 145) |
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|
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# ValueRange may induce a copy to the transient database. |
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# Therefore we put it last so that we can execute this method |
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# twice to check whether the other methods still work after the |
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# copy |
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self.assertEquals(table.ValueRange("AREA"), (0.0, 19.462)) |
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|
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unique = table.UniqueValues("PONET_ID") |
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unique.sort() |
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self.assertEquals(unique, range(1, 157)) |
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|
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def test_transient_table(self): |
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"""Test TransientTable(dbftable) |
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|
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The TransientTable should copy the data to the |
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TransientDatabase. |
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""" |
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orig_table = DBFTable(os.path.join("..", "Data", "iceland", |
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"political.dbf")) |
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table = TransientTable(self.transientdb, orig_table) |
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self.run_iceland_political_tests(table) |
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|
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# The transient_table method should return the table itself |
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self.assert_(table is table.transient_table()) |
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|
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# The title is simply copied over from the original table |
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self.assertEquals(table.Title(), orig_table.Title()) |
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|
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# The TransientTable class itself doesn't implement the |
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# Dependencies method, so we don't test it. |
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|
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|
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def test_auto_transient_table(self): |
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"""Test AutoTransientTable(dbftable) |
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|
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The AutoTransientTable should copy the data to the |
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TransientDatabase on demand. |
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""" |
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orig_table = DBFTable(os.path.join("..", "Data", "iceland", |
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"political.dbf")) |
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table = AutoTransientTable(self.transientdb, orig_table) |
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|
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# Run the tests twice so that we execute them once when the data |
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# has not been copied to the transient db yet and once when it |
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# has. This assumes that run_iceland_political_tests does at |
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# least one call to a method that copies to the transient db at |
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# its end. |
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self.run_iceland_political_tests(table) |
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self.run_iceland_political_tests(table) |
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|
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def test_auto_transient_table_query(self): |
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"""Test AutoTransientTable.SimpleQuery()""" |
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orig_table = DBFTable(os.path.join("..", "Data", "iceland", |
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"political.dbf")) |
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table = AutoTransientTable(self.transientdb, orig_table) |
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# Only a simple test here. The AutoTransientTable simply |
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# delegates to its transient table so it should be OK that the |
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# real test for it is in test_transient_table_query. However, |
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# it's important to check that the column handling works |
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# correctly because the AutoTransientTable and it's underlying |
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# transient table use different column object types. |
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self.assertEquals(table.SimpleQuery(table.Column("AREA"), ">", 10.0), |
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[144]) |
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|
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# test using a Column object as the right parameter |
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self.assertEquals(table.SimpleQuery(table.Column("POPYTYPE"), |
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"==", |
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table.Column("POPYREG")), |
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range(156)) |
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|
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def test_auto_transient_table_dependencies(self): |
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"""Test AutoTransientTable.Dependencies()""" |
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orig_table = DBFTable(os.path.join("..", "Data", "iceland", |
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"political.dbf")) |
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table = AutoTransientTable(self.transientdb, orig_table) |
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self.assertEquals(table.Dependencies(), (orig_table,)) |
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|
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def test_auto_transient_table_title(self): |
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"""Test AutoTransientTable.Title()""" |
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orig_table = DBFTable(os.path.join("..", "Data", "iceland", |
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"political.dbf")) |
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table = AutoTransientTable(self.transientdb, orig_table) |
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# The title is of course the same as that of the original table |
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self.assertEquals(table.Title(), orig_table.Title()) |
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|
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def test_transient_joined_table(self): |
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"""Test TransientJoinedTable""" |
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simple = MemoryTable([("type", FIELDTYPE_STRING), |
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("code", FIELDTYPE_INT)], |
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[("OTHER/UNKNOWN", 0), |
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("RUINS", 1), |
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("FARM", 2), |
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("BUILDING", 3), |
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("HUT", 4), |
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("LIGHTHOUSE", 5)]) |
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auto = AutoTransientTable(self.transientdb, simple) |
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filename = os.path.join("..", "Data", "iceland", |
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"cultural_landmark-point.dbf") |
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landmarks = AutoTransientTable(self.transientdb, DBFTable(filename)) |
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|
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table = TransientJoinedTable(self.transientdb, landmarks, "CLPTLABEL", |
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auto, "type") |
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|
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self.assertEquals(table.NumRows(), 34) |
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self.assertEquals(table.NumColumns(), 8) |
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self.assertEquals(table.Column(0).type, FIELDTYPE_DOUBLE) |
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self.assertEquals(table.Column(0).name, 'AREA') |
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self.assertEquals(table.Column(7).type, FIELDTYPE_INT) |
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self.assertEquals(table.Column(7).name, 'code') |
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self.assertEquals(table.Column(4).type, FIELDTYPE_STRING) |
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self.assertEquals(table.Column(4).name, 'CLPTLABEL') |
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# HasColumn |
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self.failUnless(table.HasColumn("AREA")) |
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self.failUnless(table.HasColumn(1)) |
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# HasColumn for non-exisiting columns |
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self.failIf(table.HasColumn("non_existing_name")) |
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self.failIf(table.HasColumn(100)) |
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|
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# Reading rows and values |
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self.assertEquals(table.ReadRowAsDict(22), |
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{'PERIMETER': 0.0, 'CLPOINT_': 23, |
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'AREA': 0.0, 'CLPTLABEL': 'RUINS', |
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'CLPOINT_ID': 38, 'CLPTFLAG': 0, |
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'code': 1, 'type': 'RUINS'}) |
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self.assertEquals(table.ReadValue(22, "type"), 'RUINS') |
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self.assertEquals(table.ReadValue(22, 7), 1) |
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|
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# The transient_table method should return the table itself |
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self.assert_(table is table.transient_table()) |
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|
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# The TransientJoinedTable depends on both input tables |
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self.assertEquals(table.Dependencies(), (landmarks, auto)) |
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|
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# The title is constructed from the titles of the input tables. |
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self.assertEquals(table.Title(), |
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"Join of %s and %s" % (landmarks.Title(), |
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auto.Title())) |
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|
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|
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def test_transient_joined_table_same_column_name(self): |
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"""Test TransientJoinedTable join on columns with same name |
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The transient DB maps the column names used by the tables to |
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another set of names used only inside the SQLite database. There |
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was a bug in the way this mapping was used when joining on |
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fields with the same names in both tables so that the joined |
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table ended up joining on the same column in the same table. |
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""" |
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mem_stretches = MemoryTable([("stretch_id", FIELDTYPE_INT)], |
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[(i,) for i in range(4)]) |
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stretches = AutoTransientTable(self.transientdb, mem_stretches) |
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|
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mem_discharges = MemoryTable([("disch_id", FIELDTYPE_INT), |
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("stretch_id", FIELDTYPE_INT)], |
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[(1, 0), (2, 3)]) |
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discharges = AutoTransientTable(self.transientdb, mem_discharges) |
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|
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table = TransientJoinedTable(self.transientdb, stretches, "stretch_id", |
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discharges, "stretch_id", |
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outer_join = True) |
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|
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self.assertEquals(table.NumRows(), 4) |
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self.assertEquals(table.NumColumns(), 3) |
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|
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# HasColumn |
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self.failUnless(table.HasColumn("stretch_id")) |
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self.failUnless(table.HasColumn("disch_id")) |
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|
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|
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def test_transient_joined_table_with_equal_column_names(self): |
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"""Test TransientJoinedTable join on tables with equal column names |
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If a name collision occurs for the field names, underscores are |
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appended as long as any collision is resolved. |
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""" |
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mem_stretches = MemoryTable([("stretch_id", FIELDTYPE_INT), |
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("name", FIELDTYPE_INT)], |
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[(0, 10), (1, 11), (2, 12), (3, 13) ]) |
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stretches = AutoTransientTable(self.transientdb, mem_stretches) |
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|
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mem_discharges = MemoryTable([("disch_id", FIELDTYPE_INT), |
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("stretch_id", FIELDTYPE_INT), |
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("name", FIELDTYPE_INT)], |
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[(1, 0, 1), (2, 3, 2)]) |
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discharges = AutoTransientTable(self.transientdb, mem_discharges) |
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|
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table = TransientJoinedTable(self.transientdb, stretches, "stretch_id", |
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discharges, "stretch_id", |
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outer_join = True) |
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|
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self.assertEquals(table.NumRows(), 4) |
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self.assertEquals(table.NumColumns(), 5) |
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|
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# HasColumn |
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self.assertEquals([c.name for c in table.Columns()], |
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["stretch_id", "name", "disch_id", "stretch_id_", |
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"name_"]) |
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|
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def test_transient_joined_table_name_collisions_dont_modify_in_place(self): |
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"""Test TransientJoinedTable name-collisions do not modifying in place |
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|
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The name collision work-around by appending underscores |
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accidentally modified the column objects in place. We do two |
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joins therefore in reverse order to detect this: The first join |
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will lead to a modified name in the column object of the right |
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table which is then used as the left table in the second join so |
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the underscored name will appear before the non-underscored one |
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in the list of column names after the second join. |
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""" |
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mem1 = MemoryTable([("stretch_id", FIELDTYPE_INT), |
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("name", FIELDTYPE_INT)], |
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[(0, 10), (1, 11), (2, 12), (3, 13) ]) |
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table1 = AutoTransientTable(self.transientdb, mem1) |
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|
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mem2 = MemoryTable([("stretch_id", FIELDTYPE_INT), |
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("name", FIELDTYPE_INT)], |
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[(0, 10), (1, 11), (2, 12), (3, 13) ]) |
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table2 = AutoTransientTable(self.transientdb, mem2) |
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|
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table = TransientJoinedTable(self.transientdb, table1, "stretch_id", |
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table2, "stretch_id", outer_join = True) |
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table = TransientJoinedTable(self.transientdb, table2, "stretch_id", |
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table1, "stretch_id", outer_join = True) |
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|
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self.assertEquals([c.name for c in table.Columns()], |
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["stretch_id", "name", "stretch_id_", "name_"]) |
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|
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def test_transient_table_read_twice(self): |
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"""Test TransientTable.ReadRowAsDict() reading the same record twice""" |
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simple = MemoryTable([("type", FIELDTYPE_STRING), |
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("code", FIELDTYPE_INT)], |
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[("OTHER/UNKNOWN", 0), |
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("RUINS", 1), |
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("FARM", 2), |
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("BUILDING", 3), |
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("HUT", 4), |
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("LIGHTHOUSE", 5)]) |
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table = TransientTable(self.transientdb, simple) |
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|
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# There was a bug where reading the same record twice would |
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# raise an exception in the second call because of an |
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# unitialized local variable, so for passing the test it's |
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# enough if reading simply succeeds. OTOH, while we're at it we |
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# might as well check whether the results are equal anyway :) |
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result1 = table.ReadRowAsDict(3) |
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result2 = table.ReadRowAsDict(3) |
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self.assertEquals(result1, result2) |
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|
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|
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def test_transient_table_query(self): |
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"""Test TransientTable.SimpleQuery()""" |
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simple = MemoryTable([("type", FIELDTYPE_STRING), |
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("value", FIELDTYPE_DOUBLE), |
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("code", FIELDTYPE_INT)], |
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[("OTHER/UNKNOWN", -1.5, 11), |
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("RUINS", 0.0, 1), |
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("FARM", 3.141, 2), |
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("BUILDING", 2.5, 3), |
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("HUT", 1e6, 4), |
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("LIGHTHOUSE", -0.01, 5)]) |
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table = TransientTable(self.transientdb, simple) |
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|
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# A column and a value |
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self.assertEquals(table.SimpleQuery(table.Column(0), "==", "RUINS"), |
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[1]) |
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self.assertEquals(table.SimpleQuery(table.Column(2), "!=", 2), |
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[0, 1, 3, 4, 5]) |
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self.assertEquals(table.SimpleQuery(table.Column(1), "<", 1.0), |
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[0, 1, 5]) |
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self.assertEquals(table.SimpleQuery(table.Column(1), "<=", -1.5), |
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[0]) |
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self.assertEquals(table.SimpleQuery(table.Column(2), ">", 3), |
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[0, 4, 5]) |
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self.assertEquals(table.SimpleQuery(table.Column(2), ">=", 3), |
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[0, 3, 4, 5]) |
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|
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# Two columns as operands |
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self.assertEquals(table.SimpleQuery(table.Column(1), |
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"<=", table.Column(2)), |
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[0, 1, 3, 5]) |
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|
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# Test whether invalid operators raise a ValueError |
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self.assertRaises(ValueError, |
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table.SimpleQuery, |
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table.Column(1), "<<", table.Column(2)) |
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|
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def test_transienttable_to_dbf(self): |
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memtable = MemoryTable([("type", FIELDTYPE_STRING), |
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("value", FIELDTYPE_DOUBLE), |
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("code", FIELDTYPE_INT)], |
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[("UNKNOWN", 0.0, 0), |
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("Foo", 0.5, -1), |
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("Foo", 1.0/256, 100), |
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("bar", 1e10, 17)]) |
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table = TransientTable(self.transientdb, memtable) |
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filename = self.temp_file_name("test_transienttable_to_dbf.dbf") |
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table_to_dbf(table, filename) |
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|
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dbf = dbflib.DBFFile(filename) |
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self.assertEquals(dbf.read_record(2), |
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{'code': 100, 'type': 'Foo', 'value': 0.00390625}) |
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self.assertEquals(dbf.field_count(), 3) |
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self.assertEquals(dbf.record_count(), 4) |
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self.assertEquals(dbf.field_info(0), |
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(dbflib.FTString, "type", 7, 0)) |
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self.assertEquals(dbf.field_info(1), |
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(dbflib.FTDouble, "value", 24, 12)) |
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self.assertEquals(dbf.field_info(2), |
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(dbflib.FTInteger, "code", 3, 0)) |
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|
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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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