Test new logging approach, both debug.logger and resetLogging

src/debug.py

@@ -68,7 +68,8 @@ def configureLogging():
     fail_msg = ''
     try:
         logging_config = os.path.join(state.appdata, 'logging.dat')
-        logging.config.fileConfig(logging_config)
+        logging.config.fileConfig(
+            logging_config, disable_existing_loggers=False)
         return (
             False,
             'Loaded logger configuration from %s' % logging_config
@@ -80,7 +81,8 @@ def configureLogging():
                 ' logging config\n%s' % \
                 (logging_config, sys.exc_info())
         else:
-            # no need to confuse the user if the logger config is missing entirely
+            # no need to confuse the user if the logger config
+            # is missing entirely
             fail_msg = 'Using default logger configuration'
 
     logging_config = {

src/tests/test_logger.py

@@ -0,0 +1,69 @@
+"""
+Testing the logger configuration
+"""
+
+import logging
+import os
+import tempfile
+import unittest
+
+
+class TestLogger(unittest.TestCase):
+    """A test case for bmconfigparser"""
+
+    conf_template = '''
+[loggers]
+keys=root
+
+[handlers]
+keys=default
+
+[formatters]
+keys=default
+
+[formatter_default]
+format=%(asctime)s {1} %(message)s
+
+[handler_default]
+class=FileHandler
+level=NOTSET
+formatter=default
+args=('{0}', 'w')
+
+[logger_root]
+level=DEBUG
+handlers=default
+'''
+
+    def test_fileConfig(self):
+        """Put logging.dat with special pattern and check it was used"""
+        tmp = os.environ['BITMESSAGE_HOME'] = tempfile.gettempdir()
+        log_config = os.path.join(tmp, 'logging.dat')
+        log_file = os.path.join(tmp, 'debug.log')
+
+        def gen_log_config(pattern):
+            """A small closure to generate logging.dat with custom pattern"""
+            with open(log_config, 'wb') as dst:
+                dst.write(self.conf_template.format(log_file, pattern))
+
+        pattern = r' o_0 '
+        gen_log_config(pattern)
+
+        try:
+            from pybitmessage.debug import logger, resetLogging
+            if not os.path.isfile(log_file):  # second pass
+                pattern = r' <===> '
+                gen_log_config(pattern)
+                resetLogging()
+        except ImportError:
+            self.fail('There is no package pybitmessage. Things gone wrong.')
+        finally:
+            os.remove(log_config)
+
+        logger_ = logging.getLogger('default')
+
+        self.assertEqual(logger, logger_)
+
+        logger_.info('Testing the logger...')
+
+        self.assertRegexpMatches(open(log_file).read(), pattern)