Add a functional regression test. (#7451)

Refs #2964

tests/functional/r/regression_02/regression_2964.py

@@ -0,0 +1,24 @@
+"""
+Regression test for `no-member`.
+See: https://github.com/PyCQA/pylint/issues/2964
+"""
+
+# pylint: disable=missing-class-docstring,too-few-public-methods
+# pylint: disable=unused-private-member,protected-access
+
+
+class Node:
+    def __init__(self, name, path=()):
+        """
+        Initialize self with "name" string and the tuple "path" of its parents.
+        "self" is added to the tuple as its last item.
+        """
+        self.__name = name
+        self.__path = path + (self,)
+
+    def get_full_name(self):
+        """
+        A `no-member` message was emitted:
+        nodes.py:17:24: E1101: Instance of 'tuple' has no '__name' member (no-member)
+        """
+        return ".".join(node.__name for node in self.__path)