Add test for tuple bounds

Author: zanieb

parser/src/parser.rs

@@ -656,6 +656,16 @@ class Foo[T: str](A, B):
         insta::assert_debug_snapshot!(ast::Suite::parse(source, "<test>").unwrap());
     }
 
+    #[test]
+    #[cfg(feature = "all-nodes-with-ranges")]
+    fn test_parse_class_with_generic_type_with_tuple_bound() {
+        let source = "\
+class Foo[T: (str, bytes)](A, B):
+  pass
+";
+        insta::assert_debug_snapshot!(ast::Suite::parse(source, "<test>").unwrap());
+    }
+
     #[test]
     #[cfg(feature = "all-nodes-with-ranges")]
     fn test_parse_class_with_multiple_generic_types() {