Fix #3299 false positives with names in string literal type annotations (#7400)

Don't emit 'unused-variable' or 'unused-import' on names in string literal type annotations (#3299)
Don't treat strings inside typing.Literal as names

1 files changed, 26 insertions, 0 deletions

diff --git a/tests/checkers/unittest_utils.py b/tests/checkers/unittest_utils.py
index 8b9189892..f68a48dbb 100644
--- a/tests/checkers/unittest_utils.py
+++ b/tests/checkers/unittest_utils.py
@@ -489,3 +489,29 @@ def test_deprecation_check_messages() -> None:
             records[0].message.args[0]
             == "utils.check_messages will be removed in favour of calling utils.only_required_for_messages in pylint 3.0"
         )
+
+
+def test_is_typing_literal() -> None:
+    code = astroid.extract_node(
+        """
+    from typing import Literal as Lit, Set as Literal
+    import typing as t
+
+    Literal #@
+    Lit #@
+    t.Literal #@
+    """
+    )
+
+    assert not utils.is_typing_literal(code[0])
+    assert utils.is_typing_literal(code[1])
+    assert utils.is_typing_literal(code[2])
+
+    code = astroid.extract_node(
+        """
+    Literal #@
+    typing.Literal #@
+    """
+    )
+    assert not utils.is_typing_literal(code[0])
+    assert not utils.is_typing_literal(code[1])