packages/webview_flutter/webview_flutter_web/example/integration_test/webview_flutter_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 'dart:html' as html;

import 'package:flutter/material.dart';
import 'package:flutter/widgets.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:integration_test/integration_test.dart';
import 'package:webview_flutter_web_example/web_view.dart';

void main() {
  IntegrationTestWidgetsFlutterBinding.ensureInitialized();

  // URLs to navigate to in tests. These need to be URLs that we are confident will
  // always be accessible, and won't do redirection. (E.g., just
  // 'https://www.google.com/' will sometimes redirect traffic that looks
  // like it's coming from a bot, which is true of these tests).
  const String primaryUrl = 'https://flutter.dev/';
  const String secondaryUrl = 'https://www.google.com/robots.txt';

  testWidgets('initialUrl', (WidgetTester tester) async {
    final Completer<WebViewController> controllerCompleter =
        Completer<WebViewController>();
    await tester.pumpWidget(
      Directionality(
        textDirection: TextDirection.ltr,
        child: WebView(
          key: GlobalKey(),
          initialUrl: primaryUrl,
          onWebViewCreated: (WebViewController controller) {
            controllerCompleter.complete(controller);
          },
        ),
      ),
    );
    await controllerCompleter.future;

    // Assert an iframe has been rendered to the DOM with the correct src attribute.
    final html.IFrameElement? element =
        html.document.querySelector('iframe') as html.IFrameElement?;
    expect(element, isNotNull);
    expect(element!.src, primaryUrl);
  });

  testWidgets('loadUrl', (WidgetTester tester) async {
    final Completer<WebViewController> controllerCompleter =
        Completer<WebViewController>();
    await tester.pumpWidget(
      Directionality(
        textDirection: TextDirection.ltr,
        child: WebView(
          key: GlobalKey(),
          initialUrl: primaryUrl,
          onWebViewCreated: (WebViewController controller) {
            controllerCompleter.complete(controller);
          },
        ),
      ),
    );
    final WebViewController controller = await controllerCompleter.future;
    await controller.loadUrl(secondaryUrl);

    // Assert an iframe has been rendered to the DOM with the correct src attribute.
    final html.IFrameElement? element =
        html.document.querySelector('iframe') as html.IFrameElement?;
    expect(element, isNotNull);
    expect(element!.src, secondaryUrl);
  });
}