Add paths option in local-plugins config file.

tests/fixtures/config_files/local-plugin-path.ini

@@ -0,0 +1,5 @@
+[flake8:local-plugins]
+extension =
+  XE = aplugin:ExtensionTestPlugin2
+paths =
+  ../../integration/subdir/

tests/integration/subdir/aplugin.py

@@ -0,0 +1,16 @@
+"""Module that is off sys.path by default, for testing local-plugin-paths."""
+
+
+class ExtensionTestPlugin2(object):
+    """Extension test plugin in its own directory."""
+
+    name = 'ExtensionTestPlugin2'
+    version = '1.0.0'
+
+    def __init__(self, tree):
+        """Construct an instance of test plugin."""
+        pass
+
+    def run(self):
+        """Do nothing."""
+        pass

tests/integration/test_plugins.py

@@ -3,6 +3,7 @@ from flake8.main import application
 
 
 LOCAL_PLUGIN_CONFIG = 'tests/fixtures/config_files/local-plugin.ini'
+LOCAL_PLUGIN_PATH_CONFIG = 'tests/fixtures/config_files/local-plugin-path.ini'
 
 
 class ExtensionTestPlugin(object):
@@ -56,3 +57,11 @@ def test_local_plugin_can_add_option():
         ['flake8', '--config', LOCAL_PLUGIN_CONFIG, '--anopt', 'foo'])
 
     assert app.options.anopt == 'foo'
+
+
+def test_enable_local_plugin_at_non_installed_path():
+    """Can add a paths option in local-plugins config section for finding."""
+    app = application.Application()
+    app.initialize(['flake8', '--config', LOCAL_PLUGIN_PATH_CONFIG])
+
+    assert app.check_plugins['XE'].plugin.name == 'ExtensionTestPlugin2'