flutter/packages/unit/test/widget/align_test.dart

import 'package:flutter/widgets.dart';
import 'package:test/test.dart';

import 'widget_tester.dart';

void main() {
  test('Align smoke test', () {
    testWidgets((WidgetTester tester) {
      tester.pumpWidget(
        new Align(
          child: new Container(),
          alignment: const FractionalOffset(0.75, 0.75)
        )
      );

      tester.pumpWidget(
        new Align(
          child: new Container(),
          alignment: const FractionalOffset(0.5, 0.5)
        )
      );
    });
  });
}