gh-94808: Coverage: Test uppercase string literal prefixes (GH-95925)

(cherry picked from commit f00383ec9bb9452fd9d5f5003f123e68fc4a71d8)

Co-authored-by: Michael Droettboom <mdboom@gmail.com>

diff --git a/Lib/test/test_string_literals.py b/Lib/test/test_string_literals.py
index 7231970acf19d77dca19fc21e1924dc7e451f1f7..f3d5f3341a7f6e45f70ce37aaec326efe95362e6 100644 (file)
--- a/Lib/test/test_string_literals.py
+++ b/Lib/test/test_string_literals.py
@@ -213,6 +213,13 @@ class TestLiterals(unittest.TestCase):
         self.assertRaises(SyntaxError, eval, """ bu'' """)
         self.assertRaises(SyntaxError, eval, """ ub'' """)
 
+    def test_uppercase_prefixes(self):
+        self.assertEqual(eval(""" B'x' """), b'x')
+        self.assertEqual(eval(r""" R'\x01' """), r'\x01')
+        self.assertEqual(eval(r""" BR'\x01' """), br'\x01')
+        self.assertEqual(eval(""" F'{1+1}' """), f'{1+1}')
+        self.assertEqual(eval(r""" U'\U0001d120' """), u'\U0001d120')
+
     def check_encoding(self, encoding, extra=""):
         modname = "xx_" + encoding.replace("-", "_")
         fn = os.path.join(self.tmpdir, modname + ".py")