Add test and code for handling __all__ with pylint. Closes #4685.

2 files changed, 49 insertions, 0 deletions

diff --git a/test/input/func_all.py b/test/input/func_all.py
new file mode 100644
index 0000000..e9f1fc8
--- /dev/null
+++ b/test/input/func_all.py
@@ -0,0 +1,45 @@
+"""Test Pylint's use of __all__.
+
+* NonExistant is not defined in this module, and it is listed in
+  __all__. An error is expected.
+
+* This module imports path and republished it in __all__. No errors
+  are expected.
+"""
+#  pylint: disable=R0903,R0201,W0612
+
+__revision__ = 0
+
+from os import path
+
+__all__ = [
+    'Dummy',
+    'NonExistant',
+    'path',
+    'func',
+    'inner',
+    'InnerKlass']
+
+
+class Dummy(object):
+    """A class defined in this module."""
+    pass
+
+DUMMY = Dummy()
+
+def function():
+    """Function docstring
+    """
+    pass
+
+function()
+
+class Klass(object):
+    """A klass which contains a function"""
+    def func(self):
+        """A klass method"""
+        inner = None
+
+    class InnerKlass(object):
+        """A inner klass"""
+        pass
diff --git a/test/messages/func_all.txt b/test/messages/func_all.txt
new file mode 100644
index 0000000..ba0e855
--- /dev/null
+++ b/test/messages/func_all.txt
@@ -0,0 +1,4 @@
+E: 17: Undefined variable name 'NonExistant' in __all__
+E: 19: Undefined variable name 'func' in __all__
+E: 20: Undefined variable name 'inner' in __all__
+E: 21: Undefined variable name 'InnerKlass' in __all__