blob: d81d18c75cdf1589900737581f4453038f4da416 [file] [log] [blame]
// Copyright 2014 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:html' as html;
import 'package:flutter_test/flutter_test.dart';
import 'package:integration_test/integration_test.dart';
import 'package:web_e2e_tests/common.dart';
import 'package:web_e2e_tests/image_loading_main.dart' as app;
void main() {
testWidgets('Image loads asset variant based on device pixel ratio',
(WidgetTester tester) async {
await app.main();
await tester.pumpAndSettle();
// `pumpAndSettle` only waits until no more frames are scheduled, but the
// test must wait for the image network requests to finish.
await app.whenAssetImageLoads;
await app.whenNetworkImageLoads;
// At the time the network requests are finished the engine may not have
// updated the DOM yet. Delay checking the DOM until the next event, which
// will guarantee that the current frame is done rendering.
await Future<void>.delayed(;
final List<html.ImageElement> imageElements = findElements('img').cast<html.ImageElement>();
expect(imageElements.length, 2);
expect(imageElements[0].naturalWidth, 1.5 * 64);
expect(imageElements[0].naturalHeight, 1.5 * 64);
expect(imageElements[0].width, 64);
expect(imageElements[0].height, 64);
expect(imageElements[1].width, isNot(0));