test/initializer_type_filter_test.dart

// Copyright (c) 2015, 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.

// TODO(jakemac): swap this to @TestOn('pub-serve') once
// https://github.com/dart-lang/test/issues/388 is completed.
@TestOn('!js')
library initialize.initializer_type_filter_test;

import 'package:initialize/initialize.dart';
import 'package:test/test.dart';

// Initializers will mess with this value, and it gets reset to 0 at the
// start of every test.
var total;

main() {
  setUp(() {
    total = 0;
  });

  test('filter option limits which types of annotations will be ran', () {
    return run(typeFilter: const [_Adder])
        .then((_) {
          expect(total, 2);
        })
        .then((_) => run(typeFilter: const [_Subtractor]))
        .then((_) {
          expect(total, 0);
        })
        .then((_) => run(typeFilter: const [_Adder]))
        .then((_) {
          // Sanity check, future calls should be no-ops
          expect(total, 0);
        })
        .then((_) => run(typeFilter: const [_Subtractor]))
        .then((_) {
          expect(total, 0);
        });
  });
}

@adder
a() {}
@subtractor
b() {}
@adder
@subtractor
c() {}

// Initializer that increments `total` by one.
class _Adder implements Initializer<dynamic> {
  const _Adder();

  @override
  initialize(_) => total++;
}

const adder = const _Adder();

// Initializer that decrements `total` by one.
class _Subtractor implements Initializer<dynamic> {
  const _Subtractor();

  @override
  initialize(_) => total--;
}

const subtractor = const _Subtractor();