gh-95066: ast: Replace assert with ValueError (GH-95072)

Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/Lib/test/test_ast.py b/Lib/test/test_ast.py
index 9734218..de34ccf 100644
--- a/Lib/test/test_ast.py
+++ b/Lib/test/test_ast.py
@@ -756,6 +756,12 @@ class AST_Tests(unittest.TestCase):
         with self.assertRaises(SyntaxError):
             ast.parse('(x := 0)', feature_version=(3, 7))
 
+    def test_invalid_major_feature_version(self):
+        with self.assertRaises(ValueError):
+            ast.parse('pass', feature_version=(2, 7))
+        with self.assertRaises(ValueError):
+            ast.parse('pass', feature_version=(4, 0))
+
     def test_constant_as_name(self):
         for constant in "True", "False", "None":
             expr = ast.Expression(ast.Name(constant, ast.Load()))