python - Using pyodbc in Unit Tests -


i'm struggling write unit tests python use pyodbc query local sql server database.

the following code runs...

import pyodbc import random import unittest emailsender import emailsender  class testsequencefunctions(unittest.testcase):      def setup(self):         self.email_sender = emailsender()         self.other_email_sender = emailsender()      def test_for_initialisation_variables(self):         """         tests check object created         """         self.asserttrue(self.email_sender.server)         self.asserttrue(self.email_sender.errorlogfile)         self.asserttrue(self.email_sender.connection)         self.asserttrue(self.email_sender.cursor)         self.asserttrue(self.email_sender.siteauth)         self.asserttrue(self.email_sender.apicallslimitperrun)      def test_sql_server_connection(self):         value in self.email_sender.cursor.execute("select * sys.tables"):.             print value

however, when add second, identical test code...

import pyodbc import random import unittest emailsender import emailsender  class testsequencefunctions(unittest.testcase):      def setup(self):         self.email_sender = emailsender()         self.other_email_sender = emailsender()      def test_for_initialisation_variables(self):         """         tests check object created         """         self.asserttrue(self.email_sender.server)         self.asserttrue(self.email_sender.errorlogfile)         self.asserttrue(self.email_sender.connection)         self.asserttrue(self.email_sender.cursor)         self.asserttrue(self.email_sender.siteauth)         self.asserttrue(self.email_sender.apicallslimitperrun)      def test_sql_server_connection(self):         value in self.email_sender.cursor.execute("select * sys.tables"):.             print value      def test_getsites_method(self):         value in self.other_email_sender.cursor.execute("select * sys.tables"):.             print value

the third test fails following error message:

error: ('im001', '[im001] [unixodbc][driver manager]driver not support function (0) (sqlrowcount)')

p.s.

just note, started off 1 email_sender object being created couldn't run back queries changed query identical , when didn't work, added connection , cursor there no issues re: position cursor.

found solution - problem in (default) teardown method.

something going on cursor wasn't being reset - overrode method below , hey presto, worked:

def teardown(self):     """     make sure reset cursor     """     if self.email_sender.connection:         self.email_sender.connection.close()     del self.email_sender

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