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#------------------------------------------------------------------------------
# Copyright 2016, 2017, Oracle and/or its affiliates. All rights reserved.
#
# Portions Copyright 2007-2015, Anthony Tuininga. All rights reserved.
#
# Portions Copyright 2001-2007, Computronix (Canada) Ltd., Edmonton, Alberta,
# Canada. All rights reserved.
#------------------------------------------------------------------------------
"""Module for testing connections."""
import random
import threading
class TestConnection(TestCase):
def __ConnectAndDrop(self):
"""Connect to the database, perform a query and drop the connection."""
connection = cx_Oracle.connect(self.username, self.password,
self.tnsentry, threaded = True)
cursor = connection.cursor()
cursor.execute(u"select count(*) from TestNumbers")
count, = cursor.fetchone()
self.assertEqual(count, 10)
def __VerifyAttributes(self, connection, attrName, value, sql):
setattr(connection, attrName, value)
cursor = connection.cursor()
cursor.execute(sql)
result, = cursor.fetchone()
self.assertEqual(result, value, "%s value mismatch" % attrName)
def setUp(self):
self.username = USERNAME
self.password = PASSWORD
self.tnsentry = TNSENTRY
def verifyArgs(self, connection):
self.assertEqual(connection.username, self.username,
"user name differs")
self.assertEqual(connection.tnsentry, self.tnsentry,
"tnsentry differs")
self.assertEqual(connection.dsn, self.tnsentry, "dsn differs")
def testAllArgs(self):
"connection to database with user, password, TNS separate"
connection = cx_Oracle.connect(self.username, self.password,
self.tnsentry)
self.verifyArgs(connection)
def testAppContext(self):
"test use of application context"
namespace = "CLIENTCONTEXT"
appContextEntries = [
( namespace, "ATTR1", "VALUE1" ),
( namespace, "ATTR2", "VALUE2" ),
( namespace, "ATTR3", "VALUE3" )
]
connection = cx_Oracle.connect(self.username, self.password,
self.tnsentry, appcontext = appContextEntries)
cursor = connection.cursor()
for namespace, name, value in appContextEntries:
cursor.execute("select sys_context(:1, :2) from dual",
(namespace, name))
actualValue, = cursor.fetchone()
self.assertEqual(actualValue, value)
def testAppContextNegative(self):
"test invalid use of application context"
self.assertRaises(TypeError, cx_Oracle.connect, self.username,
self.password, self.tnsentry,
appcontext = [('userenv', 'action')])
def testAttributes(self):
"test connection end-to-end tracing attributes"
connection = cx_Oracle.connect(USERNAME, PASSWORD, TNSENTRY)
if CLIENT_VERSION >= (12, 1):
self.__VerifyAttributes(connection, "dbop", "cx_OracleTest_DBOP",
"select dbop_name from v$sql_monitor "
"where sid = sys_context('userenv', 'sid')")
self.__VerifyAttributes(connection, "action", "cx_OracleTest_Action",
"select sys_context('userenv', 'action') from dual")
self.__VerifyAttributes(connection, "module", "cx_OracleTest_Module",
"select sys_context('userenv', 'module') from dual")
self.__VerifyAttributes(connection, "clientinfo",
"cx_OracleTest_CInfo",
"select sys_context('userenv', 'client_info') from dual")
self.__VerifyAttributes(connection, "client_identifier",
"cx_OracleTest_CID",
"select sys_context('userenv', 'client_identifier') from dual")
def testAutoCommit(self):
"test use of autocommit"
connection = cx_Oracle.connect(USERNAME, PASSWORD, TNSENTRY)
cursor = connection.cursor()
otherConnection = cx_Oracle.connect(USERNAME, PASSWORD, TNSENTRY)
otherCursor = otherConnection.cursor()
cursor.execute("truncate table TestTempTable")
cursor.execute("""
insert into TestTempTable (IntCol, StringCol)
values (1, null)""")
otherCursor.execute("select * from TestTempTable")
rows = otherCursor.fetchall()
self.assertEqual(rows, [])
connection.autocommit = True
cursor.execute("""
insert into TestTempTable (IntCol, StringCol)
values (2, null)""")
otherCursor.execute("select * from TestTempTable order by IntCol")
rows = otherCursor.fetchall()
self.assertEqual(rows, [(1, None), (2, None)])
def testBadConnectString(self):
"connection to database with bad connect string"
self.assertRaises(cx_Oracle.DatabaseError, cx_Oracle.connect,
self.username)
self.assertRaises(cx_Oracle.DatabaseError, cx_Oracle.connect,
self.username + u"@" + self.tnsentry)
self.assertRaises(cx_Oracle.DatabaseError, cx_Oracle.connect,
self.username + "@" + self.tnsentry + "/" + self.password)
def testBadPassword(self):
"connection to database with bad password"
self.assertRaises(cx_Oracle.DatabaseError, cx_Oracle.connect,
self.username, self.password + u"X", self.tnsentry)
def testChangePassword(self):
"test changing password"
newPassword = "NEW_PASSWORD"
connection = cx_Oracle.connect(self.username, self.password,
self.tnsentry)
connection.changepassword(self.password, newPassword)
cconnection = cx_Oracle.connect(self.username, newPassword,
self.tnsentry)
connection.changepassword(newPassword, self.password)
def testChangePasswordNegative(self):
"test changing password to an invalid value"
newPassword = "1" * 150
connection = cx_Oracle.connect(self.username, self.password,
self.tnsentry)
self.assertRaises(cx_Oracle.DatabaseError, connection.changepassword,
self.password, newPassword)
def testEncodings(self):
"connection with only encoding or nencoding specified should work"
connection = cx_Oracle.connect(self.username, self.password,
self.tnsentry)
encoding = connection.encoding
nencoding = connection.nencoding
connection = cx_Oracle.connect(self.username, self.password,
self.tnsentry, encoding = "UTF-8")
self.assertEqual(connection.encoding, "UTF-8")
self.assertEqual(connection.nencoding, nencoding)
connection = cx_Oracle.connect(self.username, self.password,
self.tnsentry, nencoding = "UTF-8")
self.assertEqual(connection.encoding, encoding)
self.assertEqual(connection.nencoding, "UTF-8")
def testDifferentEncodings(self):
connection = cx_Oracle.connect(self.username, self.password,
self.tnsentry, encoding = "UTF-8", nencoding = "UTF-16")
value = u"\u03b4\u4e2a"
cursor = connection.cursor()
ncharVar = cursor.var(cx_Oracle.NCHAR, 100)
ncharVar.setvalue(0, value)
cursor.execute("select :value from dual", value = ncharVar)
result, = cursor.fetchone()
self.assertEqual(result, value)
def testExceptionOnClose(self):
"confirm an exception is raised after closing a connection"
connection = cx_Oracle.connect(self.username, self.password,
self.tnsentry)
connection.close()
self.assertRaises(cx_Oracle.DatabaseError, connection.rollback)
def testConnectWithHandle(self):
"test creating a connection using a handle"
connection = cx_Oracle.connect(self.username, self.password,
self.tnsentry)
cursor = connection.cursor()
cursor.execute("truncate table TestTempTable")
intValue = random.randint(1, 32768)
cursor.execute("insert into TestTempTable values (:val, null)",
val = intValue)
connection2 = cx_Oracle.connect(handle = connection.handle)
cursor = connection2.cursor()
cursor.execute("select IntCol from TestTempTable")
fetchedIntValue, = cursor.fetchone()
self.assertEqual(fetchedIntValue, intValue)
cursor.close()
self.assertRaises(cx_Oracle.DatabaseError, connection2.close)
connection.close()
cursor = connection2.cursor()
self.assertRaises(cx_Oracle.DatabaseError, cursor.execute,
"select count(*) from TestTempTable")
def testMakeDSN(self):
"test making a data source name from host, port and sid"
formatString = u"(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)" + \
"(HOST=%s)(PORT=%d))(CONNECT_DATA=(SID=%s)))"
args = ("hostname", 1521, "TEST")
result = cx_Oracle.makedsn(*args)
self.assertEqual(result, formatString % args)
args = (u"hostname", 1521, u"TEST")
result = cx_Oracle.makedsn(*args)
self.assertEqual(result, formatString % args)
def testSingleArg(self):
"connection to database with user, password, TNS together"
connection = cx_Oracle.connect("%s/%s@%s" % \
(self.username, self.password, self.tnsentry))
self.verifyArgs(connection)
def testVersion(self):
"connection version is a string"
connection = cx_Oracle.connect(self.username, self.password,
self.tnsentry)
self.assertTrue(isinstance(connection.version, str))
def testRollbackOnClose(self):
"connection rolls back before close"
connection = cx_Oracle.connect(self.username, self.password,
self.tnsentry)
cursor = connection.cursor()
cursor.execute("truncate table TestTempTable")
otherConnection = cx_Oracle.connect(self.username, self.password,
self.tnsentry)
otherCursor = otherConnection.cursor()
otherCursor.execute("insert into TestTempTable (IntCol) values (1)")
otherCursor.close()
otherConnection.close()
cursor.execute("select count(*) from TestTempTable")
count, = cursor.fetchone()
self.assertEqual(count, 0)
def testRollbackOnDel(self):
"connection rolls back before destruction"
connection = cx_Oracle.connect(self.username, self.password,
self.tnsentry)
cursor = connection.cursor()
cursor.execute("truncate table TestTempTable")
otherConnection = cx_Oracle.connect(self.username, self.password,
self.tnsentry)
otherCursor = otherConnection.cursor()
otherCursor.execute("insert into TestTempTable (IntCol) values (1)")
del otherCursor
del otherConnection
cursor.execute("select count(*) from TestTempTable")
count, = cursor.fetchone()
self.assertEqual(count, 0)
def testThreading(self):
"connection to database with multiple threads"
threads = []
for i in range(20):
thread = threading.Thread(None, self.__ConnectAndDrop)
threads.append(thread)
thread.start()
for thread in threads:
thread.join()
def testStringFormat(self):
"test string format of connection"
connection = cx_Oracle.connect(self.username, self.password,
self.tnsentry)
expectedValue = "<cx_Oracle.Connection to %s@%s>" % \
(self.username, self.tnsentry)
self.assertEqual(str(connection), expectedValue)
def testCtxMgrClose(self):
"test context manager - close"
connection = cx_Oracle.connect(self.username, self.password,
self.tnsentry)
with connection:
cursor = connection.cursor()
cursor.execute("truncate table TestTempTable")
cursor.execute("insert into TestTempTable values (1, null)")
connection.commit()
cursor.execute("insert into TestTempTable values (2, null)")
self.assertRaises(cx_Oracle.DatabaseError, connection.ping)
connection = cx_Oracle.connect(self.username, self.password,
self.tnsentry)
cursor = connection.cursor()
cursor.execute("select count(*) from TestTempTable")
count, = cursor.fetchone()
self.assertEqual(count, 1)
def testConnectionAttributes(self):
"test connection attribute values"
connection = cx_Oracle.connect(self.username, self.password,
self.tnsentry, encoding = "ASCII")
self.assertEqual(connection.maxBytesPerCharacter, 1)
connection = cx_Oracle.connect(self.username, self.password,
self.tnsentry, encoding = "UTF-8")
self.assertEqual(connection.maxBytesPerCharacter, 4)
if CLIENT_VERSION >= (12, 1):
self.assertEqual(connection.ltxid, b'')
self.assertEqual(connection.current_schema, None)
connection.current_schema = "test_schema"
self.assertEqual(connection.current_schema, "test_schema")
self.assertEqual(connection.edition, None)
connection.external_name = "test_external"
self.assertEqual(connection.external_name, "test_external")
connection.internal_name = "test_internal"
self.assertEqual(connection.internal_name, "test_internal")
connection.stmtcachesize = 30
self.assertEqual(connection.stmtcachesize, 30)
self.assertRaises(TypeError, connection.stmtcachesize, 20.5)
self.assertRaises(TypeError, connection.stmtcachesize, "value")
def testClosedConnectionAttributes(self):
"test closed connection attribute values"
connection = cx_Oracle.connect(self.username, self.password,
self.tnsentry)
connection.close()
attrNames = ["current_schema", "edition", "external_name",
"internal_name", "stmtcachesize"]
if CLIENT_VERSION >= (12, 1):
attrNames.append("ltxid")
for name in attrNames:
self.assertRaises(cx_Oracle.DatabaseError, getattr, connection,
name)
def testPing(self):
"test connection ping"
connection = cx_Oracle.connect(self.username, self.password,
self.tnsentry)
connection.ping()
def testTransactionBegin(self):
"test begin, prepare, cancel transaction"
connection = cx_Oracle.connect(self.username, self.password,
self.tnsentry)
cursor = connection.cursor()
cursor.execute("truncate table TestTempTable")
connection.begin(10, 'trxnId', 'branchId')
self.assertEqual(connection.prepare(), False)
connection.begin(10, 'trxnId', 'branchId')
cursor.execute("""
insert into TestTempTable (IntCol, StringCol)
values (1, 'tesName')""")
self.assertEqual(connection.prepare(), True)
connection.cancel()
connection.rollback()
cursor.execute("select count(*) from TestTempTable")
count, = cursor.fetchone()
self.assertEqual(count, 0)
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