Unit test pylint.checkers.utils.is_typing_literal

tests/checkers/unittest_utils.py

@@ -489,3 +489,29 @@ def visit_assname(self, node: nodes.NodeNG) -> 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])