Teil17 Datenbanken
This commit is contained in:
65
db/testdb.py
65
db/testdb.py
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import unittest
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from DBConnection import DBConnection
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import logging
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logging.basicConfig( format='%(asctime)-15s [%(levelname)s] %(funcName)s: %(message)s', level=logging.DEBUG)
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class TestDBConnection(unittest.TestCase):
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@classmethod
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def setUpClass(cls):
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logging.debug(f'setUpClass() {cls}')
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cls.db_connection = DBConnection()
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cls.db_connection.connect('database','piuser','SW_Ep.6:ROTJ','pidb')
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logging.debug('erzeuge Table fib...')
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cls.db_connection.execute_query('create table if not exists fib (id int auto_increment primary key, wert int)')
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cls.db_connection.execute_query('create table if not exists schueler (id int auto_increment primary key, vorname varchar(20),name varchar(20))')
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logging.debug('setup() fertig')
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@classmethod
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def tearDownClass(cls):
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logging.debug(f'tearDownClass() {cls}')
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logging.debug('Räume Tables auf')
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cls.db_connection.execute_query('drop table if exists fib')
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cls.db_connection.execute_query('drop table if exists schueler')
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logging.debug('schliesse Datenbankverbindung.')
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cls.db_connection.disconnect()
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cls.db_connection = None
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def test_insert(self):
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logging.debug(f'connected= {self.db_connection.isConnected()}')
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self.assertTrue(self.db_connection.isConnected())
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self.db_connection.execute_query("insert into schueler (name,vorname) values('Simpson','Bart')")
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self.db_connection.execute_query("insert into schueler (name,vorname) values('Simpson','Lisa')")
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self.db_connection.execute_query("insert into schueler (name,vorname) values('van Houten','Milhouse')")
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self.db_connection.execute_query("insert into schueler (name,vorname) values('Wiggum','Ralph')")
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# input('Press Any Key')
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def test_select(self):
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# self.test_insert()
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self.assertTrue(self.db_connection.isConnected())
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result = self.db_connection.execute_query("select * from schueler where name='Simpson'")
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self.assertEqual(2,len(result))
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result = self.db_connection.execute_query("select * from schueler")
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self.assertEqual(4,len(result))
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def test_connected(self):
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self.assertTrue(self.db_connection.isConnected())
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def test_disconnect(self):
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self.db_connection.disconnect()
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self.assertFalse(self.db_connection.isConnected())
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def test_create_table(self):
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self.assertTrue(self.db_connection.isConnected())
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if __name__ =='__main__':
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unittest.main()
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1
db/.gitignore → teil17/.gitignore
vendored
1
db/.gitignore → teil17/.gitignore
vendored
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./__pycache__
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./__pycache__
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./db.ini
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./network/__pycache__/*
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./network/__pycache__/*
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#encoding: utf-8
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import mysql.connector
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import mysql.connector
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import logging
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import logging
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@@ -7,47 +8,38 @@ class DBConnection():
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def __init__(self):
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def __init__(self):
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self.dbconnection = None
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self.dbconnection = None
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#Verbindung zur Datenbank mit den übergebenen Wreten herstellen.
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def connect(self, host, user, password, database):
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def connect(self, host, user, password, database):
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self.connection= mysql.connector.connect(host=host, user=user,password=password,database=database)
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self.connection= mysql.connector.connect(host=host, user=user,password=password,database=database)
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logging.debug(f'Datenbankverbindung aufgebaut ${self.connection}')
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logging.debug(f'Cursor gesetzt ${self.cursor}')
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# Verbindung trennen
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def disconnect(self):
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def disconnect(self):
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if self.connection is not None:
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if self.connection is not None:
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self.connection.close()
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self.connection.close()
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self.connection = None
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# Schüler-Record in die Tabelle einfügen.
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def insertSchueler(self,schueler):
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self.execute_query('insert into schueler (name,vorname) values(%s,%s)', (schueler['name'],schueler['vorname']))
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# Liefert True, wenn die Verbindung zur DB besteht, sonst False
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def isConnected(self):
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def isConnected(self):
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# logging.debug(f'connection={self.connection}')
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# logging.debug(f'connected= {self.connection.is_connected()}')
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if self.connection is not None:
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if self.connection is not None:
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return self.connection.is_connected()
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return self.connection.is_connected()
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return False
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return False
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# Wenn DB-Verbindung besteht, wird der Cursor geliefert, sonst None
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def cursor(self):
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def cursor(self):
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if self.isConnected():
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if self.isConnected():
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return self.connection.cursor()
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return self.connection.cursor()
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return None
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return None
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def insert(self,cmd):
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# Datenbank Kommando ausführen. Das params-Tupel wird in die Query eingesetzt.
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pass
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# Liefert ein Resultset zurück.
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def fetch(self):
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pass
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def create_table(self):
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pass
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def execute_query(self, query, params = None):
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def execute_query(self, query, params = None):
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if self.isConnected():
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if self.isConnected():
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cursor = self.cursor()
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cursor = self.cursor()
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if cursor is not None:
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if cursor is not None:
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cursor.execute(query,params)
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cursor.execute(query,params) #Kommdo ausführen
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return cursor.fetchall()
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return cursor.fetchall() # Ergebnis zurückliefern.
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BIN
teil17/__pycache__/DBConnection.cpython-39.pyc
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BIN
teil17/__pycache__/DBConnection.cpython-39.pyc
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Binary file not shown.
8
teil17/db.ini.sample
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8
teil17/db.ini.sample
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[pidb]
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host=database
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user=piuser
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password=<passwort>
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database=pidb
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88
teil17/testdb.py
Executable file
88
teil17/testdb.py
Executable file
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#!/usr/bin/python3
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# encoding:utf-8
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import unittest
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from DBConnection import DBConnection
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import logging
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import configparser
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logging.basicConfig( format='%(asctime)-15s [%(levelname)s] %(funcName)s: %(message)s', level=logging.DEBUG)
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schueler = [
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{'name':'Simpson','vorname': 'Bart'},
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{'name':'Simpson','vorname':'Lisa'},
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{'name':'van Houten','vorname':'Milhouse'},
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{'name':'Wiggum','vorname':'Ralph'},
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{'name':'Jones','vorname':'Jimbo'}
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]
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class TestDBConnection(unittest.TestCase):
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@classmethod
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def setUpClass(cls):
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logging.debug(f'setUpClass() {cls}')
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config = configparser.ConfigParser()
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config.read('db.ini')
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logging.debug(f"host={config['pidb']['host']}")
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cls.db_connection = DBConnection()
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cls.db_connection.connect(config['pidb']['host'],config['pidb']['user'],config['pidb']['password'],config['pidb']['database'])
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if cls.db_connection.isConnected():
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logging.debug('erzeuge Table schueler...')
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cls.db_connection.execute_query('create table if not exists schueler (id int auto_increment primary key, vorname varchar(20),name varchar(20))')
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# Testdaten aufbauen.
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cls.fill_table()
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logging.debug('setup() fertig')
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@classmethod
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def tearDownClass(cls):
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logging.debug(f'tearDownClass() {cls}')
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logging.debug('Räume Tables auf')
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cls.db_connection.execute_query('drop table if exists schueler')
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logging.debug('schliesse Datenbankverbindung.')
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cls.db_connection.disconnect()
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cls.db_connection = None
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# input('Press Any Key')
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#Testdaten in die Datenbank übertragen
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@classmethod
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def fill_table(cls):
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for s in range(0,len(schueler)):
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student = schueler[s]
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cls.db_connection.insertSchueler(student)
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# Nur die Records mit Nachname ='Simpson' lesen
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def test_select_name(self):
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self.assertTrue(self.db_connection.isConnected())
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result = self.db_connection.execute_query("select * from schueler where name='Simpson'")
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self.assertEqual(2,len(result))
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def test_select_all(self):
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# self.test_insert()
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result = self.db_connection.execute_query("select * from schueler")
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logging.debug(f'result={result}')
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self.assertEqual(len(schueler),len(result))
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for i in range(len(result)):
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self.assertEqual(schueler[i]['vorname'], result[i][1])
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def test_connected(self):
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self.assertTrue(self.db_connection.isConnected())
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def test_create_table(self):
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self.assertTrue(self.db_connection.isConnected())
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if __name__ =='__main__':
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unittest.main()
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