Add specific tests for is_inline_ignored

Update the logic so someone can use a class in their ``# noqa`` ignore
list

2 files changed, 21 insertions, 1 deletions

diff --git a/flake8/style_guide.py b/flake8/style_guide.py
index af68dce..6a05249 100644
--- a/flake8/style_guide.py
+++ b/flake8/style_guide.py
@@ -173,7 +173,7 @@ class StyleGuide(object):
             return True
 
         codes = set(utils.parse_comma_separated_list(codes_str))
-        if error.code in codes:
+        if error.code in codes or error.code.startswith(tuple(codes)):
             LOG.debug('%r is ignored specifically inline with ``# noqa: %s``',
                       error, codes_str)
             return True
diff --git a/tests/unit/test_style_guide.py b/tests/unit/test_style_guide.py
index e02fdc7..4ae4f5f 100644
--- a/tests/unit/test_style_guide.py
+++ b/tests/unit/test_style_guide.py
@@ -125,6 +125,26 @@ def test_should_report_error(select_list, ignore_list, error_code, expected):
     assert guide.should_report_error(error_code) is expected
 
 
+@pytest.mark.parametrize('error_code,physical_line,expected_result', [
+    ('E111', 'a = 1', False),
+    ('E121', 'a = 1  # noqa: E111', False),
+    ('E121', 'a = 1  # noqa: E111,W123,F821', False),
+    ('E111', 'a = 1  # noqa: E111,W123,F821', True),
+    ('W123', 'a = 1  # noqa: E111,W123,F821', True),
+    ('E111', 'a = 1  # noqa: E11,W123,F821', True),
+])
+def test_is_inline_ignored(error_code, physical_line, expected_result):
+    """Verify that we detect inline usage of ``# noqa``."""
+    guide = style_guide.StyleGuide(create_options(select=['E', 'W', 'F']),
+                                   arguments=[],
+                                   listener_trie=None,
+                                   formatter=None)
+    error = style_guide.Error(error_code, 'filename.py', 1, 1, 'error text')
+
+    with mock.patch('linecache.getline', return_value=physical_line):
+        assert guide.is_inline_ignored(error) is expected_result
+
+
 @pytest.mark.parametrize('select_list,ignore_list,error_code', [
     (['E111', 'E121'], [], 'E111'),
     (['E111', 'E121'], [], 'E121'),