fix bug with parsing WrapModes from config file

2 files changed, 23 insertions, 2 deletions

diff --git a/isort/settings.py b/isort/settings.py
index c1d17802..aac9d50d 100644
--- a/isort/settings.py
+++ b/isort/settings.py
@@ -32,7 +32,7 @@ import stat
 import warnings
 from distutils.util import strtobool
 from functools import lru_cache
-from typing import Any, Dict, Iterable, List, Mapping, MutableMapping, Type
+from typing import Any, Dict, Iterable, List, Mapping, MutableMapping, Callable
 
 from .utils import difference, union
 
@@ -216,6 +216,13 @@ def _update_settings_with_config(
         _update_with_config_file(editor_config_file, sections, computed_settings)
 
 
+def _get_str_to_type_converter(setting_name: str) -> Callable[[str], Any]:
+    type_converter = type(default.get(setting_name, ''))  # type: Callable[[str], Any]
+    if type_converter == WrapModes:
+        type_converter = WrapModes.from_string
+    return type_converter
+
+
 def _update_with_config_file(
     file_path: str,
     sections: Iterable[str],
@@ -243,7 +250,7 @@ def _update_with_config_file(
 
     for key, value in settings.items():
         access_key = key.replace('not_', '').lower()
-        existing_value_type = type(default.get(access_key, ''))  # type: Type[Any]
+        existing_value_type = _get_str_to_type_converter(access_key)
         if existing_value_type in (list, tuple):
             # sections has fixed order values; no adding or substraction from any set
             if access_key == 'sections':
diff --git a/test_isort.py b/test_isort.py
index b35d6cdd..e7f03d0d 100644
--- a/test_isort.py
+++ b/test_isort.py
@@ -26,6 +26,7 @@ import os.path
 import sys
 import sysconfig
 
+import py
 import pytest
 
 from isort import finders, main, settings
@@ -2772,3 +2773,16 @@ def test_noqa_issue_679():
                    'import zed # NOQA\n'
                    'import ujson # NOQA\n')
     assert SortImports(file_contents=test_input).output == test_output
+
+
+def test_extract_multiline_output_wrap_setting_from_a_config_file(tmpdir: py.path.local) -> None:
+    editorconfig_contents = [
+        'root = true',
+        ' [*.py]',
+        'multi_line_output = 5'
+    ]
+    config_file = tmpdir.join('.editorconfig')
+    config_file.write('\n'.join(editorconfig_contents))
+
+    config = settings.from_path(str(tmpdir))
+    assert config['multi_line_output'] == WrapModes.VERTICAL_GRID_GROUPED