gistfile1.txt

// When to use expectAsync?


import 'package:unittest/unittest.dart';
import 'dart:async';

syncAdd(x, y) => x + y;
asyncAdd(x, y) => new Future.value(x + y);

void main() {
  test('testing sync code synchronously', () {
    expect(syncAdd(3, 4), 7);
  });

  test('testing sync code asynchronously', () {
    new Future(expectAsync(() {
      expect(syncAdd(3, 4), 7);
    }));
  });

  test('testing async code synchronously', () {
    asyncAdd(3, 4).then((result) {
      expect(result, 7);
    });
  });

  test('testing async code asynchronously', () {
    new Future(expectAsync(() {
      asyncAdd(3, 4).then((result) {
        expect(result, 7);
      });
    }));
  });

  test("testing async without expectAsync(). DON'T DO THIS.", () {
    new Future(() {
      // Test does not run!!!!!!!!
      expect(1, 2);
    });
  });
}