Fix a crash when `TYPE_CHECKING` is used without importing it (#8435) (#8436)

(cherry picked from commit 4c56ba82d7aac50b1ea34e929833c91418e1d117)

Co-authored-by: Jacob Walls <jacobtylerwalls@gmail.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/tests/checkers/unittest_utils.py b/tests/checkers/unittest_utils.py
index b2cbcb590..a0dfe299b 100644
--- a/tests/checkers/unittest_utils.py
+++ b/tests/checkers/unittest_utils.py
@@ -447,6 +447,16 @@ def test_if_typing_guard() -> None:
     assert utils.is_typing_guard(code[3]) is False
 
 
+def test_in_type_checking_block() -> None:
+    code = astroid.extract_node(
+        """
+    if TYPE_CHECKING:  # don't import this!
+        import math  #@
+    """
+    )
+    assert utils.in_type_checking_block(code) is False
+
+
 def test_is_empty_literal() -> None:
     list_node = astroid.extract_node("a = []")
     assert utils.is_base_container(list_node.value)