testing/dart/dart_test.dart

// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import 'dart:async';

import 'package:test/test.dart';

/// Verifies Dart semantics governed by flags set by Flutter tooling.
void main() {
  String greeting = 'hello';
  Future<void> changeGreeting() async {
    greeting += ' 1';
    await Future<void>.value();
    greeting += ' 2';
  }
  test('execution of async method starts synchronously', () async {
    expect(greeting, 'hello');
    final Future<void> future = changeGreeting();
    expect(greeting, 'hello 1');
    await future;
    expect(greeting, 'hello 1 2');
  });
}