pkg/compiler/test/inlining/meta_annotations_test.dart

// 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.

import 'package:expect/async_helper.dart';
import 'package:expect/expect.dart';
import 'package:compiler/src/common/elements.dart';
import 'package:compiler/src/compiler.dart';
import 'package:compiler/src/elements/entities.dart';
import 'package:compiler/src/kernel/kernel_world.dart';
import 'package:compiler/src/util/memory_compiler.dart';

const Map<String, String> MEMORY_SOURCE_FILES = const {
  'main.dart': r"""
import 'package:meta/dart2js.dart';

int method(String arg) => arg.length;

@noInline
int methodNoInline(String arg) => arg.length;

@tryInline
int methodTryInline(String arg) => arg.length;


void main(List<String> args) {
  print(method(args[0]));
  print(methodNoInline('bar'));
  print(methodTryInline('bar'));
}
""",
};

main() {
  runTests() async {
    CompilationResult result = await runCompiler(
      memorySourceFiles: MEMORY_SOURCE_FILES,
    );
    Compiler compiler = result.compiler!;
    KClosedWorld closedWorld = compiler.frontendClosedWorldForTesting!;
    KElementEnvironment elementEnvironment = closedWorld.elementEnvironment;
    Expect.isFalse(compiler.compilationFailed, 'Unsuccessful compilation');

    void test(
      String name, {
      bool expectNoInline = false,
      bool expectTryInline = false,
    }) {
      LibraryEntity mainLibrary = elementEnvironment.mainLibrary!;
      final method =
          elementEnvironment.lookupLibraryMember(mainLibrary, name)
              as FunctionEntity?;
      Expect.isNotNull(method);
      Expect.equals(
        expectNoInline,
        closedWorld.annotationsData.hasNoInline(method!),
        "Unexpected annotation of @pragma('dart2js:noInline') on '$method'.",
      );
      Expect.equals(
        expectTryInline,
        closedWorld.annotationsData.hasTryInline(method),
        "Unexpected annotation of @pragma('dart2js:tryInline') on '$method'.",
      );
    }

    test('method');
    test('methodNoInline', expectNoInline: true);
    test('methodTryInline', expectTryInline: true);
  }

  asyncTest(() async {
    print('--test from kernel------------------------------------------------');
    await runTests();
  });
}