Clean up a number of 2.19 opt outs in language tests.

This is less than half of them, will send some other chunks later.

Bug:51557
Change-Id: I4e80812a689fde99e23c34b6405aaf57cd431ce8
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/289261
Reviewed-by: Bob Nystrom <[email protected]>
Commit-Queue: Jake Macdonald <[email protected]>

Author: jakemac53

tests/corelib/map_test.dart

@@ -2,10 +2,6 @@
 // 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.
 
-// TODO(51557): Decide if the mixins being applied in this test should be
-// "mixin", "mixin class" or the test should be left at 2.19.
-// @dart=2.19
-
 library map_test;
 
 import "package:expect/expect.dart";
@@ -858,7 +854,7 @@ class Mutable {
 }
 
 // Slow implementation of Map based on MapBase.
-abstract class MapBaseOperations<K, V> {
+mixin class MapBaseOperations<K, V> {
   final List _keys = <K>[];
   final List _values = <V>[];
   int _modCount = 0;

tests/corelib/map_update_test.dart

@@ -2,10 +2,6 @@
 // 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.
 
-// TODO(51557): Decide if the mixins being applied in this test should be
-// "mixin", "mixin class" or the test should be left at 2.19.
-// @dart=2.19
-
 import "package:expect/expect.dart";
 import 'dart:collection';
 import 'dart:convert' show json;
@@ -130,7 +126,7 @@ void testNonNull(Map<Comparable?, Object?> map) {
 }
 
 // Slow implementation of Map based on MapBase.
-abstract class MapBaseOperations<K, V> {
+mixin class MapBaseOperations<K, V> {
   final List _keys = <K>[];
   final List _values = <V>[];
   int _modCount = 0;

tests/language/abstract/getter2_test.dart

@@ -2,10 +2,6 @@
 // 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.
 
-// TODO(51557): Decide if the mixins being applied in this test should be
-// "mixin", "mixin class" or the test should be left at 2.19.
-// @dart=2.19
-
 import "package:expect/expect.dart";
 
 class A {
@@ -25,7 +21,7 @@ class C extends B {
   int get x => super.x;
 }
 
-class GetterConcrete {
+mixin class GetterConcrete {
   var _foo;
 
   get foo => _foo;

tests/language/call/method_as_cast_test.dart

@@ -2,8 +2,7 @@
 // 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.
 
-// TODO(51557): Decide if the mixins being applied in this test should be
-// "mixin", "mixin class" or the test should be left at 2.19.
+// Implements Function which is not allowed in Dart 3.
 // @dart=2.19
 
 // Dart test program to test arithmetic operations.

tests/language/call/method_implicit_invoke_instance_test.dart

@@ -2,8 +2,7 @@
 // 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.
 
-// TODO(51557): Decide if the mixins being applied in this test should be
-// "mixin", "mixin class" or the test should be left at 2.19.
+// Implements Function which is not allowed in Dart 3.
 // @dart=2.19
 
 // Dart test program to test arithmetic operations.

tests/language/call/method_implicit_invoke_local_runtime_1_test.dart

@@ -5,8 +5,7 @@
 // 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.
 
-// TODO(51557): Decide if the mixins being applied in this test should be
-// "mixin", "mixin class" or the test should be left at 2.19.
+// Implements Function which is not allowed in Dart 3.
 // @dart=2.19
 
 // Dart test program to test arithmetic operations.

tests/language/call/method_implicit_invoke_local_runtime_2_test.dart

@@ -5,8 +5,7 @@
 // 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.
 
-// TODO(51557): Decide if the mixins being applied in this test should be
-// "mixin", "mixin class" or the test should be left at 2.19.
+// Implements Function which is not allowed in Dart 3.
 // @dart=2.19
 
 // Dart test program to test arithmetic operations.

tests/language/call/method_implicit_invoke_local_runtime_3_test.dart

@@ -5,8 +5,7 @@
 // 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.
 
-// TODO(51557): Decide if the mixins being applied in this test should be
-// "mixin", "mixin class" or the test should be left at 2.19.
+// Implements Function which is not allowed in Dart 3.
 // @dart=2.19
 
 // Dart test program to test arithmetic operations.

tests/language/call/method_implicit_invoke_local_runtime_4_test.dart

@@ -5,8 +5,7 @@
 // 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.
 
-// TODO(51557): Decide if the mixins being applied in this test should be
-// "mixin", "mixin class" or the test should be left at 2.19.
+// Implements Function which is not allowed in Dart 3.
 // @dart=2.19
 
 // Dart test program to test arithmetic operations.

tests/language/call/method_implicit_invoke_local_runtime_test.dart

@@ -5,8 +5,7 @@
 // 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.
 
-// TODO(51557): Decide if the mixins being applied in this test should be
-// "mixin", "mixin class" or the test should be left at 2.19.
+// Implements Function which is not allowed in Dart 3.
 // @dart=2.19
 
 // Dart test program to test arithmetic operations.

tests/language/call/method_implicit_invoke_local_test.dart

@@ -2,8 +2,7 @@
 // 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.
 
-// TODO(51557): Decide if the mixins being applied in this test should be
-// "mixin", "mixin class" or the test should be left at 2.19.
+// Implements Function which is not allowed in Dart 3.
 // @dart=2.19
 
 // Dart test program to test arithmetic operations.

tests/language/call/method_implicit_invoke_static_test.dart

@@ -2,8 +2,7 @@
 // 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.
 
-// TODO(51557): Decide if the mixins being applied in this test should be
-// "mixin", "mixin class" or the test should be left at 2.19.
+// Implements Function which is not allowed in Dart 3.
 // @dart=2.19
 
 // Dart test program to test arithmetic operations.

tests/language/call/method_implicit_invoke_top_level_test.dart

@@ -2,8 +2,7 @@
 // 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.
 
-// TODO(51557): Decide if the mixins being applied in this test should be
-// "mixin", "mixin class" or the test should be left at 2.19.
+// Implements Function which is not allowed in Dart 3.
 // @dart=2.19
 
 // Dart test program to test arithmetic operations.

tests/language/call/method_is_check_test.dart

@@ -2,8 +2,7 @@
 // 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.
 
-// TODO(51557): Decide if the mixins being applied in this test should be
-// "mixin", "mixin class" or the test should be left at 2.19.
+// Implements Function which is not allowed in Dart 3.
 // @dart=2.19
 
 // Dart test program to test arithmetic operations.

tests/language/class/override_inference_test.dart

@@ -2,10 +2,6 @@
 // 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.
 
-// TODO(51557): Decide if the mixins being applied in this test should be
-// "mixin", "mixin class" or the test should be left at 2.19.
-// @dart=2.19
-
 // Test that inheriting types on overriding members work as specified.
 
 // ignore_for_file: unused_local_variable
@@ -47,7 +43,7 @@ class INumInt {
   int foo(num x) => x.toInt();
 }
 
-class IIntNum {
+mixin class IIntNum {
   num foo(int x) => x.toInt();
 }
 

tests/language/const/constructor_mixin2_test.dart

@@ -2,11 +2,7 @@
 // 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.
 
-// TODO(51557): Decide if the mixins being applied in this test should be
-// "mixin", "mixin class" or the test should be left at 2.19.
-// @dart=2.19
-
-class Mixin {
+mixin Mixin {
   var nonFinalField;
 }
 

tests/language/const/constructor_mixin3_test.dart

@@ -2,11 +2,7 @@
 // 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.
 
-// TODO(51557): Decide if the mixins being applied in this test should be
-// "mixin", "mixin class" or the test should be left at 2.19.
-// @dart=2.19
-
-class Mixin {}
+mixin Mixin {}
 
 class A {
   const A();

tests/language/const/constructor_mixin_test.dart

@@ -2,11 +2,7 @@
 // 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.
 
-// TODO(51557): Decide if the mixins being applied in this test should be
-// "mixin", "mixin class" or the test should be left at 2.19.
-// @dart=2.19
-
-class Mixin {}
+mixin Mixin {}
 
 class A {
   const A(foo);

tests/language/constructor/missing_initializer_test.dart

@@ -2,17 +2,13 @@
 // 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.
 
-// TODO(51557): Decide if the mixins being applied in this test should be
-// "mixin", "mixin class" or the test should be left at 2.19.
-// @dart=2.19
-
 // Test that it is an error for a class with no generative constructors to
 // have a final instance variable without an initializing expression, except
 // if it is `abstract` or `external`. The latter also holds in a class with
 // generative constructors.
 
 // Has factory, hence no default, hence no generative constructors.
-abstract class A {
+abstract mixin class A {
   final dynamic n;
   //            ^
   // [analyzer] COMPILE_TIME_ERROR.FINAL_NOT_INITIALIZED

tests/language/constructor/with_mixin_test.dart

@@ -2,10 +2,6 @@
 // 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.
 
-// TODO(51557): Decide if the mixins being applied in this test should be
-// "mixin", "mixin class" or the test should be left at 2.19.
-// @dart=2.19
-
 // Test super constructor invocation with mixins.
 // Regression test for issue dartbug.com/22604
 
@@ -21,7 +17,7 @@ class A {
   }
 }
 
-class I {}
+mixin I {}
 
 class B extends A with I {
   int y;

tests/language/covariant/setter_test.dart

@@ -2,10 +2,6 @@
 // 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.
 
-// TODO(51557): Decide if the mixins being applied in this test should be
-// "mixin", "mixin class" or the test should be left at 2.19.
-// @dart=2.19
-
 import "package:expect/expect.dart";
 
 class A {}
@@ -67,11 +63,11 @@ abstract class D<T> {
   void set m1(T x);
 }
 
-class E {
+mixin E {
   void set m1(A x) {}
 }
 
-class F = Object with E implements D<A>;
+mixin class F = Object with E implements D<A>;
 class G = C with E implements D<A>;
 
 class H extends Object with E implements D<A> {}

tests/language/covariant/subtyping_test.dart

@@ -2,10 +2,6 @@
 // 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.
 
-// TODO(51557): Decide if the mixins being applied in this test should be
-// "mixin", "mixin class" or the test should be left at 2.19.
-// @dart=2.19
-
 import 'package:expect/expect.dart';
 
 class Fields<T> {
@@ -132,7 +128,7 @@ testFieldOfGenericFunctionType() {
   cNum.g(42);
 }
 
-class Base {
+mixin class Base {
   int _t = 0;
   add(int t) {
     _t += t;

tests/language/covariant/subtyping_with_mixin_test.dart

@@ -2,10 +2,6 @@
 // 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.
 
-// TODO(51557): Decide if the mixins being applied in this test should be
-// "mixin", "mixin class" or the test should be left at 2.19.
-// @dart=2.19
-
 import 'package:expect/expect.dart';
 
 class A {}
@@ -14,7 +10,7 @@ class B extends A {}
 
 class Base<S> {}
 
-class Mixin<T> {
+mixin Mixin<T> {
   void f(T arg) {}
 }
 

tests/language/covariant_override/tear_off_type_test.dart

@@ -2,10 +2,6 @@
 // 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.
 
-// TODO(51557): Decide if the mixins being applied in this test should be
-// "mixin", "mixin class" or the test should be left at 2.19.
-// @dart=2.19
-
 import "package:expect/expect.dart";
 
 // If a parameter is directly or indirectly a covariant override, its type in
@@ -21,11 +17,11 @@ typedef void TakeOptionalObjectsAndInts([Object? a, int b, Object? c, int d]);
 typedef void TakeNamedInts({int a, int b, int c, int d});
 typedef void TakeNamedObjectsAndInts({Object? a, int b, Object? c, int d});
 
-class M1 {
+mixin M1 {
   method(covariant int a, int b) {}
 }
 
-class M2 {
+mixin M2 {
   method(int a, covariant int b) {}
 }
 
@@ -87,11 +83,11 @@ class Interface2 {
   void method(int a, covariant int b, int c, int d, int e) {}
 }
 
-class Mixin1 {
+mixin Mixin1 {
   void method(int a, int b, covariant int c, int d, int e) {}
 }
 
-class Mixin2 {
+mixin Mixin2 {
   void method(int a, int b, int c, covariant int d, int e) {}
 }
 

tests/language/deferred/inheritance_constraints_runtime_test.dart

@@ -5,14 +5,10 @@
 // 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.
 
-// TODO(51557): Decide if the mixins being applied in this test should be
-// "mixin", "mixin class" or the test should be left at 2.19.
-// @dart=2.19
-
 import "package:expect/expect.dart";
 import "inheritance_constraints_lib.dart" deferred as lib;
 
-class Foo {}
+mixin class Foo {}
 
 class Foo2 extends D {}