my overlay ok

my_overlay_updated.dart

import 'dart:io';

import 'package:dialog/overlayimage/overlay.dart';
import 'package:dialog/show_overlay_method.dart';
import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:network_image_mock/network_image_mock.dart';

void main() {
  TestWidgetsFlutterBinding.ensureInitialized();
  HttpOverrides.global = null;

  testWidgets('showOverlayMethod navigates to MyOverlayImage', (tester) async {
    final myOverlay = MyOverlayImage(
      foregroundColor: Colors.red.withOpacity(.5),
    );

    await mockNetworkImagesFor(
      () => _createWidget(
        tester: tester,
        route: myOverlay,
      ),
    );

    final buttonFinder = find.byType(TextButton);

    expect(buttonFinder, findsOneWidget);

    await tester.tap(buttonFinder);

    await tester.pumpAndSettle();

    // verify(() => mockObserver.didPush(any(), any())).called(1);

    // expect(find.byType(MyOverlayImage), findsOneWidget);
  });
}

Future<void> _createWidget({
  required WidgetTester tester,
  required ModalRoute<void>? route,
}) async {
  await tester.pumpWidget(
    MaterialApp(
      onGenerateRoute: (settings) {
        return route;
      },
      home: Builder(
        builder: (context) => TextButton(
          onPressed: () => showOverlayMethod(context),
          child: const Text('Show Overlay'),
        ),
      ),
    ),
  );
}