// 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=2.9

import 'dart:io';

import 'package:kernel/target/targets.dart';
import 'package:kernel/ast.dart';
import 'package:kernel/kernel.dart';
import 'package:kernel/verifier.dart';
import 'package:test/test.dart';
import 'package:vm/transformations/unreachable_code_elimination.dart'
    show transformComponent;

import '../common_test_utils.dart';

final String pkgVmDir = Platform.script.resolve('../..').toFilePath();

runTestCase(Uri source) async {
  final target = new TestingVmTarget(new TargetFlags());
  Component component = await compileTestCaseToKernelProgram(source,
      target: target,
      environmentDefines: {
        'test.define.isTrue': 'true',
        'test.define.isFalse': 'false'
      });

  component = transformComponent(component, /* enableAsserts = */ false);
  verifyComponent(component);

  final actual = kernelLibraryToString(component.mainMethod.enclosingLibrary);

  compareResultWithExpectationsFile(source, actual);
}

main() {
  group('unreachable-code-elimination', () {
    final testCasesDir = new Directory(
        pkgVmDir + '/testcases/transformations/unreachable_code_elimination');

    for (var entry in testCasesDir
        .listSync(recursive: true, followLinks: false)
        .reversed) {
      if (entry.path.endsWith(".dart")) {
        test(entry.path, () => runTestCase(entry.uri));
      }
    }
  });
}