Issue 22845. Rename should prevent the use of invalid identifiers.

pkg/analysis_server/test/services/refactoring/naming_conventions_test.dart

Index: pkg/analysis_server/test/services/refactoring/naming_conventions_test.dart
diff --git a/pkg/analysis_server/test/services/refactoring/naming_conventions_test.dart b/pkg/analysis_server/test/services/refactoring/naming_conventions_test.dart
index 04f7e03e8010c87bf1831baf3d2972514cfba81a..4652ecaf3524acdc28a70013b0c85741640aaa34 100644
--- a/pkg/analysis_server/test/services/refactoring/naming_conventions_test.dart
+++ b/pkg/analysis_server/test/services/refactoring/naming_conventions_test.dart
@@ -479,6 +479,12 @@ class NamingConventionsTest extends RefactoringTest {
         expectedMessage: "Method name must not be empty.");
   }
 
+  void test_validateMethodName_keyword() {
+    assertRefactoringStatus(
+        validateMethodName("for"), RefactoringProblemSeverity.FATAL,
+        expectedMessage: "Method name must not be a keyword.");
+  }
+
   void test_validateMethodName_leadingBlanks() {
     assertRefactoringStatus(
         validateMethodName(" newName"), RefactoringProblemSeverity.FATAL,