create an io version of the test to fix build-ipas+drive-examples's html error

Author: nturgut

packages/integration_test/example/test_driver/example_integration_extended.dart

@@ -0,0 +1,18 @@
+// This is a Flutter widget test can take a screenshot.
+//
+// NOTE: Screenshots are only supported on Web for now.
+//
+// To perform an interaction with a widget in your test, use the WidgetTester
+// utility that Flutter provides. For example, you can send tap and scroll
+// gestures. You can also use WidgetTester to find child widgets in the widget
+// tree, read text, and verify that the values of widget properties are correct.
+
+import 'package:integration_test/integration_test.dart';
+
+import 'example_integration_io_extended.dart'
+    if (dart.library.html) 'example_integration_web_extended.dart' as tests;
+
+void main() {
+  IntegrationTestWidgetsFlutterBinding.ensureInitialized();
+  tests.main();
+}

…ample_integration_web_extended_test.dart …r/example_integration_extended_test.dartpackages/integration_test/example/test_driver/example_integration_web_extended_test.dart renamed to packages/integration_test/example/test_driver/example_integration_extended_test.dart packages/integration_test/example/test_driver/example_integration_web_extended_test.dart renamed to packages/integration_test/example/test_driver/example_integration_extended_test.dart

@@ -0,0 +1,37 @@
+// This is a basic Flutter widget test.
+//
+// To perform an interaction with a widget in your test, use the WidgetTester
+// utility that Flutter provides. For example, you can send tap and scroll
+// gestures. You can also use WidgetTester to find child widgets in the widget
+// tree, read text, and verify that the values of widget properties are correct.
+
+import 'dart:io' show Platform;
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:integration_test/integration_test.dart';
+
+import 'package:integration_test_example/main.dart' as app;
+
+void main() {
+  IntegrationTestWidgetsFlutterBinding.ensureInitialized();
+
+  testWidgets('verify text', (WidgetTester tester) async {
+    // Build our app and trigger a frame.
+    app.main();
+
+    // Trigger a frame.
+    await tester.pumpAndSettle();
+
+    // TODO: Add screenshot capability for mobile platforms.
+
+    // Verify that platform version is retrieved.
+    expect(
+      find.byWidgetPredicate(
+        (Widget widget) =>
+            widget is Text &&
+            widget.data.startsWith('Platform: ${Platform.operatingSystem}'),
+      ),
+      findsOneWidget,
+    );
+  });
+}