Pyhon Test messages with all chars lowercased

test_lowercased.py

import ast
import logging
import sys
import unittest
from io import BytesIO

class TestFormatterMessagesOutputs(unittest.TestCase):

    def setUp(self):
        logging.basicConfig( level=logging.INFO)
        self.logger = logging.getLogger(__name__)
        self.log_capture_string = BytesIO()
        self.syslog = logging.StreamHandler(self.log_capture_string)        
        self.syslog.setFormatter(MyLogFormatter(LOG_FORMAT))
        self.logger.addHandler(self.syslog)
        self.logger.propagate = False

    def test_all_lowercase(self):        
        self.logger.info('Simple MESSAGE É necessária uma ação',    
            extra={'fields': 
                        {'value_1': 'a',
                         'value_2': 'B',
                         'value_3': 'DEF'
                   }
                  })                        
        log_contents = self.log_capture_string.getvalue()        
        root = ast.literal_eval(log_contents)
        message = root['msg']
        
        self.assertEquals(message.replace(" ","").islower(), True, "Message not lowercased")

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