support extend-exclude Fixes #535

tests/integration/test_checker.py

@@ -206,8 +206,7 @@ def test_report_order(results, expected_order):
     file_checker.results = results
     file_checker.display_name = 'placeholder'
 
-    style_guide = mock.Mock(spec=['options'])
-    style_guide.processing_file = mock.MagicMock()
+    style_guide = mock.MagicMock(spec=['options', 'processing_file'])
 
     # Create a placeholder manager without arguments or plugins
     # Just add one custom file checker which just provides the results

tests/integration/test_main.py

@@ -60,6 +60,22 @@ t.py:2:1: F401 'sys' imported but unused
     assert err == ''
 
 
+def test_extend_exclude(tmpdir, capsys):
+    """Ensure that `flake8 --extend-exclude` works."""
+    for d in ['project', 'vendor', 'legacy', '.git', '.tox', '.hg']:
+        tmpdir.mkdir(d).join('t.py').write('import os\nimport sys\n')
+
+    with tmpdir.as_cwd():
+        application.Application().run(['--extend-exclude=vendor,legacy'])
+
+    out, err = capsys.readouterr()
+    assert out == '''\
+./project/t.py:1:1: F401 'os' imported but unused
+./project/t.py:2:1: F401 'sys' imported but unused
+'''
+    assert err == ''
+
+
 def test_malformed_per_file_ignores_error(tmpdir, capsys):
     """Test the error message for malformed `per-file-ignores`."""
     setup_cfg = '''\

tests/unit/test_checker_manager.py

@@ -7,13 +7,12 @@ import pytest
 from flake8 import checker
 
 
-def style_guide_mock(**kwargs):
+def style_guide_mock():
     """Create a mock StyleGuide object."""
-    kwargs.setdefault('diff', False)
-    kwargs.setdefault('jobs', '4')
-    style_guide = mock.Mock()
-    style_guide.options = mock.Mock(**kwargs)
-    return style_guide
+    return mock.MagicMock(**{
+        'options.diff': False,
+        'options.jobs': '4',
+    })
 
 
 def _parallel_checker_manager():