opt assignable_expression_test into 2.19

opt switch related tests back to 2.19
opt map/set hashCode override tests back to 2.19

Change-Id: Ib5c44fc17de43eaf9bcad71d7a326c5fcbff02bf
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/285800
Auto-Submit: Jake Macdonald <jakemac@google.com>
Reviewed-by: Bob Nystrom <rnystrom@google.com>
Commit-Queue: Jake Macdonald <jakemac@google.com>

tests/language/const/map_hashcode_override2_test.dart

@@ -1,6 +1,8 @@
 // Copyright (c) 2021, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
+//
+// @dart=2.19
 
 import 'package:expect/expect.dart';
 

tests/language/const/map_hashcode_override_test.dart

@@ -1,6 +1,8 @@
 // Copyright (c) 2021, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
+//
+// @dart=2.19
 
 import 'package:expect/expect.dart';
 

tests/language/const/set_hashcode_override2_test.dart

@@ -1,6 +1,8 @@
 // Copyright (c) 2021, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
+//
+// @dart=2.19
 
 import 'package:expect/expect.dart';
 

tests/language/const/switch2_test.dart

@@ -1,6 +1,8 @@
 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
+//
+// @dart=2.19
 
 import 'package:expect/expect.dart';
 

tests/language/const_functions/const_functions_switch_statements_error_test.dart

@@ -27,17 +27,3 @@ int labelDoesNotExistSwitch(int x) {
   }
   return 0;
 }
-
-const var2 = wrongTypeSwitch(1);
-//           ^^^^^^^^^^^^^^^^^^
-// [analyzer] COMPILE_TIME_ERROR.CONST_INITIALIZED_WITH_NON_CONSTANT_VALUE
-int wrongTypeSwitch(int x) {
-  switch (x) {
-    case "string":
-      // ^^^^^^^^
-      // [analyzer] COMPILE_TIME_ERROR.CASE_EXPRESSION_TYPE_IS_NOT_SWITCH_EXPRESSION_SUBTYPE
-      // [cfe] Type 'String' of the case expression is not a subtype of type 'int' of this switch expression.
-      return 100;
-  }
-  return 0;
-}

tests/language/nonfunction_type_aliases/generic_usage_function_error_test.dart

@@ -1,6 +1,8 @@
 // Copyright (c) 2019, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
+//
+// @dart=2.19
 
 
 import 'dart:async';

tests/language/nonfunction_type_aliases/usage_function_error_test.dart

@@ -1,6 +1,8 @@
 // Copyright (c) 2019, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
+//
+// @dart=2.19
 
 
 // Introduce an aliased type.

tests/language/switch/bad_case_test.dart

@@ -1,8 +1,11 @@
 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
+//
+// @dart=2.19
 
-// Test reporting a compile-time error if case expressions are of type double.
+// Test reporting a compile-time error if case expressions are of type double,
+// prior to Dart 3.0 and patterns.
 
 import "package:expect/expect.dart";
 

tests/language/switch/case_expression_with_assignment_test.dart

@@ -1,6 +1,8 @@
 // Copyright (c) 2017, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
+//
+// @dart=2.19
 
 // Regression test for crash in VM parser (issue 29370).
 

tests/language/switch/case_test.dart

@@ -1,6 +1,8 @@
 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
+//
+// @dart=2.19
 
 import "package:expect/expect.dart";
 

tests/language/switch/case_warn_test.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 // Test switch statement.
+//
+// @dart=2.19
 
 // Tests some switch-case statements blocks that should and should not
 // cause static warnings.

tests/language/switch/empty_block_case_test.dart

@@ -1,6 +1,8 @@
 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
+//
+// @dart=2.19
 
 import "package:expect/expect.dart";
 

tests/language/switch/fallthru_test.dart

@@ -1,6 +1,8 @@
 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
+//
+// @dart=2.19
 
 import "package:expect/expect.dart";
 

tests/language/unsorted/assignable_expression_test.dart

@@ -1,6 +1,8 @@
 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
+//
+// @dart=2.19
 
 // Test to detect syntactically illegal left-hand-side (assignable)
 // expressions.