dart-lang#2559. Add merge order and augmenting declarations tests

LanguageFeatures/Augmentation-libraries/augmenting_declarations_A01_t01.dart

@@ -0,0 +1,22 @@
+// Copyright (c) 2024, 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.
+
+/// @assertion It is a compile-time error if:
+/// - An augmenting declaration has no corresponding original declaration to
+///   apply to.
+///
+/// @description Checks that it is a compile-time error if an augmenting
+/// declaration has no corresponding original declaration to apply to
+/// @author sgrekhov22@gmail.com
+
+// SharedOptions=--enable-experiment=macros
+
+augment class C {}
+//            ^
+// [analyzer] unspecified
+// [cfe] unspecified
+
+main() {
+  print(C);
+}

LanguageFeatures/Augmentation-libraries/augmenting_declarations_A01_t02.dart

@@ -0,0 +1,23 @@
+// Copyright (c) 2024, 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.
+
+/// @assertion It is a compile-time error if:
+/// - An augmenting declaration has no corresponding original declaration to
+///   apply to.
+///
+/// @description Checks that it is a compile-time error if an augmenting
+/// declaration has no corresponding original declaration to apply to
+/// @author sgrekhov22@gmail.com
+
+// SharedOptions=--enable-experiment=macros
+
+augment void foo() {}
+//           ^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+
+main() {
+  void foo() {}
+  print(foo);
+}

LanguageFeatures/Augmentation-libraries/augmenting_declarations_A01_t03.dart

@@ -0,0 +1,25 @@
+// Copyright (c) 2024, 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.
+
+/// @assertion It is a compile-time error if:
+/// - An augmenting declaration has no corresponding original declaration to
+///   apply to.
+///
+/// @description Checks that it is not an error if an augmenting
+/// declaration do has a corresponding original declaration to apply to
+/// @author sgrekhov22@gmail.com
+
+// SharedOptions=--enable-experiment=macros
+
+import '../../Utils/expect.dart';
+
+augment class C {
+  int get baz => 42;
+}
+
+class C {}
+
+main() {
+  Expect.equals(42, C().baz);
+}

LanguageFeatures/Augmentation-libraries/augmenting_declarations_A02_t01.dart

@@ -0,0 +1,25 @@
+// Copyright (c) 2024, 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.
+
+/// @assertion It is a compile-time error if:
+/// ...
+/// - An augmenting declaration appears in a library before the library where
+///   the original declaration occurs, according to merge order.
+///
+/// @description Checks that it is a compile-time error if an augmenting
+/// declaration appears before non-augmenting one. Test augmented declaration in
+/// a main library
+/// @author sgrekhov22@gmail.com
+
+// SharedOptions=--enable-experiment=macros
+
+import augment 'augmenting_declarations_A02_t01_lib.dart';
+
+/**/augment class C {}
+//  ^^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+main() {
+  print(C);
+}

LanguageFeatures/Augmentation-libraries/augmenting_declarations_A02_t01_lib.dart

@@ -0,0 +1,19 @@
+// Copyright (c) 2024, 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.
+
+/// @assertion It is a compile-time error if:
+/// ...
+/// - An augmenting declaration appears in a library before the library where
+///   the original declaration occurs, according to merge order.
+///
+/// @description Checks that it is a compile-time error if an augmenting
+/// declaration appears before non-augmenting one. Test augmented declaration in
+/// a main library
+/// @author sgrekhov22@gmail.com
+
+// SharedOptions=--enable-experiment=macros
+
+library augment 'augmenting_declarations_A02_t01.dart';
+
+class C {}

LanguageFeatures/Augmentation-libraries/augmenting_declarations_A02_t02.dart

@@ -0,0 +1,21 @@
+// Copyright (c) 2024, 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.
+
+/// @assertion It is a compile-time error if:
+/// ...
+/// - An augmenting declaration appears in a library before the library where
+///   the original declaration occurs, according to merge order.
+///
+/// @description Checks that it is a compile-time error if an augmenting
+/// declaration appears before non-augmenting one. Test augmented declaration in
+/// an augment library
+/// @author sgrekhov22@gmail.com
+
+// SharedOptions=--enable-experiment=macros
+
+import augment 'augmenting_declarations_A02_t02_lib1.dart';
+
+main() {
+  print(C);
+}

LanguageFeatures/Augmentation-libraries/augmenting_declarations_A02_t02_lib1.dart

@@ -0,0 +1,19 @@
+// Copyright (c) 2024, 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.
+
+/// @assertion A non-augmenting declaration must appear first before it can be
+/// augmented.
+///
+/// @description Checks the merge order of augment libraries
+/// @author sgrekhov22@gmail.com
+
+// SharedOptions=--enable-experiment=macros
+
+library augment 'augmenting_declarations_A02_t02.dart';
+import augment 'augmenting_declarations_A02_t02_lib2.dart';
+
+/**/augment class C {}
+//  ^^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified

LanguageFeatures/Augmentation-libraries/augmenting_declarations_A02_t02_lib2.dart

@@ -0,0 +1,15 @@
+// Copyright (c) 2024, 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.
+
+/// @assertion A non-augmenting declaration must appear first before it can be
+/// augmented.
+///
+/// @description Checks the merge order of augment libraries
+/// @author sgrekhov22@gmail.com
+
+// SharedOptions=--enable-experiment=macros
+
+library augment 'augmenting_declarations_A02_t02_lib1.dart';
+
+class C {}

LanguageFeatures/Augmentation-libraries/merge_order_A01_t01.dart

@@ -0,0 +1,27 @@
+// Copyright (c) 2024, 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.
+
+/// @assertion The merge order is defined as a depth-first pre-order traversal
+/// of the import augment directives starting at the main library.
+///
+/// @description Checks the merge order of augment libraries
+/// @author sgrekhov22@gmail.com
+/// @issue 55154
+
+// SharedOptions=--enable-experiment=macros
+
+import '../../Utils/expect.dart';
+import augment 'merge_order_A01_t01_lib1.dart';
+import augment 'merge_order_A01_t01_lib3.dart';
+
+String log = "";
+
+void logger() {
+  log += "main;";
+}
+
+main() {
+  logger();
+  Expect.equals("main;lib1;lib2;lib3;", log);
+}

LanguageFeatures/Augmentation-libraries/merge_order_A01_t01_lib1.dart

@@ -0,0 +1,20 @@
+// Copyright (c) 2024, 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.
+
+/// @assertion The merge order is defined as a depth-first pre-order traversal
+/// of the import augment directives starting at the main library.
+///
+/// @description Checks the merge order of augment libraries
+/// @author sgrekhov22@gmail.com
+
+// SharedOptions=--enable-experiment=macros
+
+library augment 'merge_order_A01_t01.dart';
+
+import augment 'merge_order_A01_t01_lib2.dart';
+
+augment void logger() {
+  augmented();
+  log += "lib1;";
+}

LanguageFeatures/Augmentation-libraries/merge_order_A01_t01_lib2.dart

@@ -0,0 +1,18 @@
+// Copyright (c) 2024, 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.
+
+/// @assertion The merge order is defined as a depth-first pre-order traversal
+/// of the import augment directives starting at the main library.
+///
+/// @description Checks the merge order of augment libraries
+/// @author sgrekhov22@gmail.com
+
+// SharedOptions=--enable-experiment=macros
+
+library augment 'merge_order_A01_t01_lib1.dart';
+
+augment void logger() {
+  augmented();
+  log += "lib2;";
+}

LanguageFeatures/Augmentation-libraries/merge_order_A01_t01_lib3.dart

@@ -0,0 +1,18 @@
+// Copyright (c) 2024, 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.
+
+/// @assertion The merge order is defined as a depth-first pre-order traversal
+/// of the import augment directives starting at the main library.
+///
+/// @description Checks the merge order of augment libraries
+/// @author sgrekhov22@gmail.com
+
+// SharedOptions=--enable-experiment=macros
+
+library augment 'merge_order_A01_t01.dart';
+
+augment void logger() {
+  augmented();
+  log += "lib3;";
+}