Fix bugs found while writing parse_cli_config test

flake8/options/config.py

@@ -186,9 +186,11 @@ class MergedConfigParser(object):
             value = method(self.program_name, option_name)
             LOG.debug('Option "%s" returned value: %r', option_name, value)
 
-            final_value = self._normalize_value(value)
+            final_value = self._normalize_value(option, value)
             config_dict[option_name] = final_value
 
+        return config_dict
+
     def is_configured_by(self, config):
         """Check if the specified config parser has an appropriate section."""
         return config.has_section(self.program_name)

flake8/options/manager.py

@@ -104,7 +104,8 @@ class Option(object):
             'dest={dest}, type={type}, callback={callback}, help={help},'
             ' callback={callback}, callback_args={callback_args}, '
             'callback_kwargs={callback_kwargs}, metavar={metavar})'
-            ).format(*self.option_args, **self.option_kwargs)
+            ).format(self.short_option_name, self.long_option_name,
+                     **self.option_kwargs)
 
     def _make_dest(self, dest):
         if dest:

tests/unit/test_merged_config_parser.py

@@ -1,4 +1,6 @@
 """Unit tests for flake8.options.config.MergedConfigParser."""
+import os
+
 import mock
 import pytest
 
@@ -38,4 +40,21 @@ def test_creates_its_own_config_file_finder(args, extra_config_files,
 
 
 def test_parse_cli_config(optmanager):
-    pass
+    optmanager.add_option('--exclude', parse_from_config=True,
+                          comma_separated_list=True,
+                          normalize_paths=True)
+    optmanager.add_option('--ignore', parse_from_config=True,
+                          comma_separated_list=True)
+    parser = config.MergedConfigParser(optmanager)
+
+    parsed_config = parser.parse_cli_config(
+        'tests/fixtures/config_files/cli-specified.ini'
+    )
+    assert parsed_config == {
+        'ignore': ['E123', 'W234', 'E111'],
+        'exclude': [
+            os.path.abspath('foo/'),
+            os.path.abspath('bar/'),
+            os.path.abspath('bogus/'),
+        ]
+    }