Added test for unicode handling around MatchSequence

Author: lieryan

ropetest/refactor/patchedasttest.py

@@ -1595,6 +1595,26 @@ def test_match_node_with_match_sequence_with_star_and_value(self):
             "MatchSequence", ["[", "", "MatchStar", "", ",", " ", "MatchValue", "", "]"]
         )
 
+    @testutils.only_for_versions_higher("3.10")
+    def test_match_node_with_match_sequence_with_multibyte_unicode(self):
+        source = dedent("""\
+            match x:
+                case ["😃", *rest] as myval:
+                    print(myval)
+        """)
+        ast_frag = patchedast.get_patched_ast(source, True)
+        checker = _ResultChecker(self, ast_frag)
+        self.assert_single_case_match_block(checker, "MatchAs")
+        checker.check_children("MatchAs", [
+            "MatchSequence", " ", "as", " ", "myval",
+        ])
+        checker.check_children("MatchSequence", [
+            "[", "", "MatchValue", "", ",", " ", "MatchStar", "", "]",
+        ])
+        checker.check_children("MatchStar", [
+            "*", "", "rest"
+        ])
+
     @testutils.only_for_versions_higher("3.10")
     def test_match_node_with_match_as_capture_pattern(self):
         source = dedent("""\