Add language versions to _2 test libraries

Change-Id: Ib33169c3e0ffc870915c189404074a1dea472546
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/196548
Reviewed-by: Bob Nystrom <rnystrom@google.com>
Commit-Queue: Leaf Petersen <leafp@google.com>

tests/corelib_2/apply2_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.
 
+// @dart = 2.9
+
 // VMOptions=
 // VMOptions=--dwarf_stack_traces --no-retain_function_objects --no-retain_code_objects
 

tests/corelib_2/apply3_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.
 
+// @dart = 2.9
+
 // Test [Function.apply] on user-defined classes that implement [noSuchMethod].
 
 import "package:expect/expect.dart";

tests/corelib_2/apply4_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.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 // Testing Function.apply calls work correctly for arities that are not

tests/corelib_2/apply5_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.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 // Testing that, when compiled to JS, Function.apply works correctly for

tests/corelib_2/apply_generic_function_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.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 import "symbol_map_helper.dart";
 

tests/corelib_2/apply_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.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 import "symbol_map_helper.dart";
 

tests/corelib_2/bigint_from_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.
 
+// @dart = 2.9
+
 // Testing Bigints with and without intrinsics.
 // VMOptions=--intrinsify --no-enable-asserts
 // VMOptions=--intrinsify --enable-asserts

tests/corelib_2/bigint_js_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.
 
+// @dart = 2.9
+
 // Testing Bigints with and without intrinsics.
 // VMOptions=--intrinsify --no-enable-asserts
 // VMOptions=--intrinsify --enable-asserts

tests/corelib_2/bigint_parse_radix_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.
 
+// @dart = 2.9
+
 // Testing Bigints with and without intrinsics.
 // VMOptions=--intrinsify --no-enable-asserts
 // VMOptions=--intrinsify --enable-asserts

tests/corelib_2/bigint_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.
 
+// @dart = 2.9
+
 // Testing Bigints with and without intrinsics.
 // VMOptions=--intrinsify --no-enable-asserts
 // VMOptions=--intrinsify --enable-asserts

tests/corelib_2/bit_twiddling_test.dart

@@ -3,6 +3,8 @@
 // BSD-style license that can be found in the LICENSE file.
 // Testing int.bitLength, int.toUnsigned and int.toSigned.
 
+// @dart = 2.9
+
 library bit_twiddling_test;
 
 import "package:expect/expect.dart";

tests/corelib_2/bool_from_environment2_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.
 
+// @dart = 2.9
+
 main() {
   const bool.fromEnvironment('NOT_FOUND', defaultValue: ''); // //# 01: compile-time error
   const bool.fromEnvironment('NOT_FOUND', defaultValue: 1); // //# 02: compile-time error

tests/corelib_2/bool_from_environment_test.dart

@@ -3,6 +3,8 @@
 // BSD-style license that can be found in the LICENSE file.
 // SharedOptions=-Da=true -Db=false -Dc=NOTBOOL -Dd=True
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 main() {

tests/corelib_2/bool_hashcode_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.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 class BoolHashCodeTest {

tests/corelib_2/bool_operator_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.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 main() {

tests/corelib_2/cast_helper.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.
 
+// @dart = 2.9
+
 final elements = <C>[c, d, e, f, null];
 
 class C {}

tests/corelib_2/cast_iterable_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.
 
+// @dart = 2.9
+
 import "dart:collection";
 import "package:expect/expect.dart";
 import 'cast_helper.dart';

tests/corelib_2/cast_list_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.
 
+// @dart = 2.9
+
 import "dart:collection";
 import "package:expect/expect.dart";
 import 'cast_helper.dart';

tests/corelib_2/cast_map_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.
 
+// @dart = 2.9
+
 import "dart:collection";
 import "package:expect/expect.dart";
 import 'cast_helper.dart';

tests/corelib_2/cast_set_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.
 
+// @dart = 2.9
+
 import "dart:collection";
 import "package:expect/expect.dart";
 import 'cast_helper.dart';

tests/corelib_2/collection_from_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.
 
+// @dart = 2.9
+
 library collection.from.test;
 
 import "package:expect/expect.dart";

tests/corelib_2/collection_length_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.
 
+// @dart = 2.9
+
 library map_test;
 
 import 'dart:collection';

tests/corelib_2/collection_of_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.
 
+// @dart = 2.9
+
 library collection.from.test;
 
 import "package:expect/expect.dart";

tests/corelib_2/collection_removes_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.
 
+// @dart = 2.9
+
 import 'dart:collection';
 import "package:expect/expect.dart";
 

tests/corelib_2/collection_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.
 
+// @dart = 2.9
+
 library collection_test;
 
 import "package:expect/expect.dart";

tests/corelib_2/collection_to_string_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.
 
+// @dart = 2.9
+
 /**
  * Tests for the toString methods on collections and maps.
  */

tests/corelib_2/compare_to2_test.dart

@@ -3,6 +3,8 @@
 // BSD-style license that can be found in the LICENSE file.
 // Dart test for testing Math.min and Math.max.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 negate(x) => -x;

tests/corelib_2/compare_to_test.dart

@@ -3,6 +3,8 @@
 // BSD-style license that can be found in the LICENSE file.
 // Dart test for testing Math.min and Math.max.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 negate(x) => -x;

tests/corelib_2/const_list_literal_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.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 // Test that a final list literal is not expandable nor modifiable.

tests/corelib_2/const_list_remove_range_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.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 main() {

tests/corelib_2/const_list_set_range_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.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 main() {

tests/corelib_2/core_runtime_types_static_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.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 /**

tests/corelib_2/core_runtime_types_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.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 /**

tests/corelib_2/data_uri_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.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 import "dart:convert";
 import "dart:typed_data";

tests/corelib_2/date_time10_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.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 // Make sure the years in the range of single digits are handled correctly with

tests/corelib_2/date_time11_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.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 // Make sure that date-times close to daylight savings work correctly.

tests/corelib_2/date_time2_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.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 // Dart test program for DateTime's hashCode.

tests/corelib_2/date_time3_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.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 // At some point dart was emitting a bad padding 0 for Dates where the ms were

tests/corelib_2/date_time4_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.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 // Test fromString with 6 digits after the decimal point.

tests/corelib_2/date_time5_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.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 // Test DateTime constructor with optional arguments.

tests/corelib_2/date_time6_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.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 // Test DateTime comparison operators.

tests/corelib_2/date_time7_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.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 // Test DateTime timeZoneName and timeZoneOffset getters.

tests/corelib_2/date_time8_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.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 // Make sure the year 0 is correctly printed.

tests/corelib_2/date_time9_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.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 main() {

tests/corelib_2/date_time_extremes_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.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 // Dart test program for DateTime, extreme values.

tests/corelib_2/date_time_far_away_dates_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.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 // Dart test program for DateTime, far away dates.

tests/corelib_2/date_time_js_modified_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.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 // The JavaScript Date constructor 'corrects' 2-digit years NN to 19NN.

tests/corelib_2/date_time_parse_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.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 check(DateTime expected, String str) {

tests/corelib_2/date_time_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.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 // Dart test program for DateTime.

tests/corelib_2/double_ceil2_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.
 
+// @dart = 2.9
+
 import 'package:expect/expect.dart';
 
 main() {

tests/corelib_2/double_ceil_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.
 
+// @dart = 2.9
+
 import 'package:expect/expect.dart';
 
 main() {

tests/corelib_2/double_ceil_to_double_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.
 
+// @dart = 2.9
+
 import 'package:expect/expect.dart';
 
 main() {

tests/corelib_2/double_compare_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.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 // Dart test program for testing 'compare' on doubles.

tests/corelib_2/double_floor2_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.
 
+// @dart = 2.9
+
 import 'package:expect/expect.dart';
 
 main() {

tests/corelib_2/double_floor_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.
 
+// @dart = 2.9
+
 import 'package:expect/expect.dart';
 
 main() {

tests/corelib_2/double_floor_to_double_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.
 
+// @dart = 2.9
+
 import 'package:expect/expect.dart';
 
 main() {

tests/corelib_2/double_hash_code_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.
 
+// @dart = 2.9
+
 // VMOptions=--intrinsify
 // VMOptions=--no_intrinsify
 

tests/corelib_2/double_parse_test.dart

@@ -4,6 +4,8 @@
 // VMOptions=--no-use-field-guards
 // VMOptions=
 
+// @dart = 2.9
+
 import "dart:math" show pow;
 import "package:expect/expect.dart";
 

tests/corelib_2/double_round2_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.
 
+// @dart = 2.9
+
 import 'package:expect/expect.dart';
 
 main() {

tests/corelib_2/double_round3_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.
 
+// @dart = 2.9
+
 import 'package:expect/expect.dart';
 
 main() {

tests/corelib_2/double_round4_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.
 
+// @dart = 2.9
+
 import 'package:expect/expect.dart';
 
 main() {

tests/corelib_2/double_round_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.
 
+// @dart = 2.9
+
 import 'package:expect/expect.dart';
 
 main() {

tests/corelib_2/double_round_to_double2_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.
 
+// @dart = 2.9
+
 import 'package:expect/expect.dart';
 
 main() {

tests/corelib_2/double_round_to_double3_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.
 
+// @dart = 2.9
+
 import 'package:expect/expect.dart';
 
 main() {

tests/corelib_2/double_round_to_double_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.
 
+// @dart = 2.9
+
 import 'package:expect/expect.dart';
 
 main() {

tests/corelib_2/double_truncate2_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.
 
+// @dart = 2.9
+
 import 'package:expect/expect.dart';
 
 main() {

tests/corelib_2/double_truncate_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.
 
+// @dart = 2.9
+
 import 'package:expect/expect.dart';
 
 main() {

tests/corelib_2/double_truncate_to_double_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.
 
+// @dart = 2.9
+
 import 'package:expect/expect.dart';
 
 main() {

tests/corelib_2/double_try_parse_test.dart

@@ -4,6 +4,8 @@
 // VMOptions=--no-use-field-guards
 // VMOptions=
 
+// @dart = 2.9
+
 import "dart:math" show pow;
 import "package:expect/expect.dart";
 

tests/corelib_2/duration_big_num_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.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 import 'dart:math';
 

tests/corelib_2/duration_double_multiplication_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.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 main() {

tests/corelib_2/duration_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.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 main() {

tests/corelib_2/dynamic_nosuchmethod_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.
 
+// @dart = 2.9
+
 // VMOptions=--lazy-dispatchers
 // VMOptions=--no-lazy-dispatchers
 

tests/corelib_2/error_stack_trace1_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.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 class A {

tests/corelib_2/error_stack_trace2_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.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 class A {

tests/corelib_2/error_stack_trace_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.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 void argument() {

tests/corelib_2/errors_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.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 // Test that error constructors do what they are documented as doing.

tests/corelib_2/exception_implementation_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.
 
+// @dart = 2.9
+
 library exception_implementation_test;
 
 import "package:expect/expect.dart";

tests/corelib_2/expando_test.dart

@@ -5,6 +5,8 @@
 // VMOptions=--enable-ffi=true
 // VMOptions=--enable-ffi=false
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 class ExpandoTest {

tests/corelib_2/expression_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.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 // Tests basic expressions. Does not attempt to validate the details of arithmetic, coercion, and

tests/corelib_2/for_in_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.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 class ForInTest {

tests/corelib_2/format_exception_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.
 
+// @dart = 2.9
+
 library format_exception_test;
 
 import "package:expect/expect.dart";

tests/corelib_2/from_environment_const_type_test.dart

@@ -3,6 +3,8 @@
 // BSD-style license that can be found in the LICENSE file.
 // SharedOptions=-Da=true -Db=false -Dc=3 -Dd=STRING
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 class Foo {}

tests/corelib_2/from_environment_const_type_undefined_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.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 class Foo {}

tests/corelib_2/from_environment_default_value_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.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 main() {

tests/corelib_2/growable_list_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.
 
+// @dart = 2.9
+
 // Sanity check on the growing behavior of a growable list.
 
 import "package:expect/expect.dart";

tests/corelib_2/has_next_iterator_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.
 
+// @dart = 2.9
+
 library hasNextIterator.test;
 
 import "package:expect/expect.dart";

tests/corelib_2/hash_map2_test.dart

@@ -5,6 +5,8 @@
 // VMOptions=
 // VMOptions=--use_internal_hash_map
 
+// @dart = 2.9
+
 // Tests of hash map behavior, with focus in iteration and concurrent
 // modification errors.
 

tests/corelib_2/hash_map_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.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 // Test program for the HashMap class.

tests/corelib_2/hash_set_test.dart

@@ -4,6 +4,8 @@
 //
 // VMOptions=
 
+// @dart = 2.9
+
 // Tests of hash set behavior, with focus in iteration and concurrent
 // modification errors.
 

tests/corelib_2/hash_set_type_check_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.
 
+// @dart = 2.9
+
 // Tests of hash set type checking.
 
 library hash_set_type_check_test;

tests/corelib_2/hashcode_boxed_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.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 double fib(double n) {

tests/corelib_2/hashcode_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.
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 class Override {

tests/corelib_2/hidden_library2_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.
 
+// @dart = 2.9
+
 // Test that the internal hidden library doesn't make problems with taking
 // stack-traces.
 

tests/corelib_2/int_ceil_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.
 
+// @dart = 2.9
+
 import 'package:expect/expect.dart';
 
 main() {

tests/corelib_2/int_ceil_to_double_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.
 
+// @dart = 2.9
+
 import 'package:expect/expect.dart';
 
 main() {

tests/corelib_2/int_floor_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.
 
+// @dart = 2.9
+
 import 'package:expect/expect.dart';
 
 main() {

tests/corelib_2/int_floor_to_double_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.
 
+// @dart = 2.9
+
 import 'package:expect/expect.dart';
 
 main() {

tests/corelib_2/int_from_environment2_test.dart

@@ -3,6 +3,8 @@
 // BSD-style license that can be found in the LICENSE file.
 // SharedOptions=-Da=x -Db=- -Dc=0xg -Dd=+ -Dd=
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 main() {

tests/corelib_2/int_from_environment_int64_test.dart

@@ -3,6 +3,8 @@
 // BSD-style license that can be found in the LICENSE file.
 // SharedOptions=-Df=-9223372036854775808 -Dg=9223372036854775807
 
+// @dart = 2.9
+
 import "package:expect/expect.dart";
 
 main() {