tests/compiler/dart2js/codegen/identity_test.dart

// Copyright (c) 2011, 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/expect.dart';
import 'package:async_helper/async_helper.dart';
import '../compiler_helper.dart';

const String TEST_ONE = r"""
class A {}
bool foo(bar) {
  var x = new A();
  var y = new A();
  return identical(x, y);
}
""";

main() {
  runTest({bool useKernel}) async {
    await compile(TEST_ONE, entry: 'foo', useKernel: useKernel,
        check: (String generated) {
      // Check that no boolify code is generated.
      RegExp regexp = new RegExp("=== true");
      Iterator matches = regexp.allMatches(generated).iterator;
      Expect.isFalse(matches.moveNext());

      regexp = new RegExp("===");
      matches = regexp.allMatches(generated).iterator;
      Expect.isTrue(matches.moveNext());
      Expect.isFalse(matches.moveNext());
    });
  }

  asyncTest(() async {
    print('--test from ast---------------------------------------------------');
    await runTest(useKernel: false);
    print('--test from kernel------------------------------------------------');
    await runTest(useKernel: true);
  });
}