测试 Flutter App

import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';

void main() {
  testWidgets('my first widget test', (WidgetTester tester) async {
    // You can use keys to locate the widget you need to test
    var sliderKey = new UniqueKey();
    var value = 0.0;

    // Tells the tester to build a UI based on the widget tree passed to it
    await tester.pumpWidget(
      new StatefulBuilder(
        builder: (BuildContext context, StateSetter setState) {
          return new MaterialApp(
            home: new Material(
              child: new Center(
                child: new Slider(
                  key: sliderKey,
                  value: value,
                  onChanged: (double newValue) {
                    setState(() {
                      value = newValue;
                    });
                  },
                ),
              ),
            ),
          );
        },
      ),
    );
    expect(value, equals(0.0));

    // Taps on the widget found by key
    await tester.tap(find.byKey(sliderKey));

    // Verifies that the widget updated the value correctly
    expect(value, equals(0.5));
  });
}

// 这一行导入扩展
import 'package:flutter_driver/driver_extension.dart';

void main() {
  // 启用扩展
  enableFlutterDriverExtension();

  // Call the `main()` of your app or call `runApp` with whatever widget
  // you are interested in testing.
}

import 'dart:async';

// Imports the Flutter Driver API
import 'package:flutter_driver/flutter_driver.dart';
import 'package:test/test.dart';

void main() {
  group('scrolling performance test', () {
    FlutterDriver driver;

    setUpAll(() async {
      // 连接app
      driver = await FlutterDriver.connect();
    });

    tearDownAll(() async {
      if (driver != null) {
        // 关闭连接
        driver.close();
      }
    });

    test('measure', () async {
      // 记录闭包中的performance timeline
      Timeline timeline = await driver.traceAction(() async {
        // Find the scrollable user list
        SerializableFinder userList = find.byValueKey('user-list');

        // Scroll down 5 times
        for (int i = 0; i < 5; i++) {
          // Scroll 300 pixels down, for 300 millis
          await driver.scroll(
              userList, 0.0, -300.0, new Duration(milliseconds: 300));

          // Emulate a user's finger taking its time to go back to the original
          // position before the next scroll
          await new Future<Null>.delayed(new Duration(milliseconds: 500));
        }

        // Scroll up 5 times
        for (int i = 0; i < 5; i++) {
          await driver.scroll(
              userList, 0.0, 300.0, new Duration(milliseconds: 300));
          await new Future<Null>.delayed(new Duration(milliseconds: 500));
        }
      });

      // The `timeline` object contains all the performance data recorded during
      // the scrolling session. It can be digested into a handful of useful
      // aggregate numbers, such as "average frame build time".
      TimelineSummary summary = new TimelineSummary.summarize(timeline);
      summary.writeSummaryToFile('stocks_scroll_perf', pretty: true);
      summary.writeTimelineToFile('stocks_scroll_perf', pretty: true);
    });
  });
}