1 files changed, 86 insertions, 0 deletions
diff --git a/tests/functional/u/undefined/undefined_variable_py30.py b/tests/functional/u/undefined/undefined_variable_py30.py
new file mode 100644
index 000000000..78d6dd3ea
--- /dev/null
+++ b/tests/functional/u/undefined/undefined_variable_py30.py
@@ -0,0 +1,86 @@
+"""Test warnings about access to undefined variables
+for various Python 3 constructs. """
+# pylint: disable=too-few-public-methods, no-init, no-self-use, import-error
+# pylint: disable=wrong-import-position, invalid-metaclass, useless-object-inheritance
+class Undefined:
+    """ test various annotation problems. """
+
+    def test(self)->Undefined: # [undefined-variable]
+        """ used Undefined, which is Undefined in this scope. """
+
+    Undefined = True
+
+    def test1(self)->Undefined:
+        """ This Undefined exists at local scope. """
+
+    def test2(self):
+        """ This should not emit. """
+        def func()->Undefined:
+            """ empty """
+            return 2
+        return func
+
+
+class Undefined1:
+    """ Other annotation problems. """
+
+    Undef = 42
+    ABC = 42
+
+    class InnerScope:
+        """ Test inner scope definition. """
+
+        def test_undefined(self)->Undef: # [undefined-variable]
+            """ Looking at a higher scope is impossible. """
+
+        def test1(self)->ABC: # [undefined-variable]
+            """ Triggers undefined-variable. """
+
+
+class FalsePositive342(object):
+    # pylint: disable=line-too-long
+    """ Fix some false positives found in
+    https://bitbucket.org/logilab/pylint/issue/342/spurious-undefined-variable-for-class
+    """
+
+    top = 42
+
+    def test_good(self, bac: top):
+        """ top is defined at this moment. """
+
+    def test_bad(self, bac: trop): # [undefined-variable]
+        """ trop is undefined at this moment. """
+
+    def test_bad1(self, *args: trop1): # [undefined-variable]
+        """ trop1 is undefined at this moment. """
+
+    def test_bad2(self, **bac: trop2): # [undefined-variable]
+        """ trop2 is undefined at this moment. """
+
+import abc
+from abc import ABCMeta
+
+class Bad(metaclass=ABCMet): # [undefined-variable]
+    """ Notice the typo """
+
+class SecondBad(metaclass=ab.ABCMeta): # [undefined-variable]
+    """ Notice the `ab` module. """
+
+class Good(metaclass=int):
+    """ int is not a proper metaclass, but it is defined. """
+
+class SecondGood(metaclass=Good):
+    """ empty """
+
+class ThirdGood(metaclass=ABCMeta):
+    """ empty """
+
+class FourthGood(ThirdGood):
+    """ This should not trigger anything. """
+
+class FifthGood(metaclass=abc.Metaclass):
+    """Metaclasses can come from imported modules."""
+
+# The following used to raise used-before-assignment
+# pylint: disable=missing-docstring, multiple-statements
+def used_before_assignment(*, arg): return arg + 1