How to write widget test for CachedNetworkImage in flutter

I can widget test Image.network using HttpOverrides and tried following code to test CachedNetworkImage with no success Is there anybody who tested this package already? I've also tried to use sqflite using setMockMethodCallHandler to MethodChannel('com.tekartik.sqflite') but just getDatabasesPath method get called what is the correct approach to test this package?

import 'dart:async';
import 'dart:io';

import 'package:cached_network_image/cached_network_image.dart';
import 'package:flutter/widgets.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:mockito/mockito.dart';

import '../unit_test/sqlcool.dart';

const List<int> kTransparentImage = <int>[
  0x89,
  0x50,
  0x4E,
  0x47,
  0x0D,
  0x0A,
  0x1A,
  0x0A,
  0x00,
  0x00,
  0x00,
  0x0D,
  0x49,
  0x48,
  0x44,
  0x52,
  0x00,
  0x00,
  0x00,
  0x01,
  0x00,
  0x00,
  0x00,
  0x01,
  0x08,
  0x06,
  0x00,
  0x00,
  0x00,
  0x1F,
  0x15,
  0xC4,
  0x89,
  0x00,
  0x00,
  0x00,
  0x0A,
  0x49,
  0x44,
  0x41,
  0x54,
  0x78,
  0x9C,
  0x63,
  0x00,
  0x01,
  0x00,
  0x00,
  0x05,
  0x00,
  0x01,
  0x0D,
  0x0A,
  0x2D,
  0xB4,
  0x00,
  0x00,
  0x00,
  0x00,
  0x49,
  0x45,
  0x4E,
  0x44,
  0xAE,
];
void main() async {
  TestWidgetsFlutterBinding.ensureInitialized();
  await setup();
  final MockHttpClient client = MockHttpClient();
  final MockHttpClientRequest request = MockHttpClientRequest();
  final MockHttpClientResponse response = MockHttpClientResponse();
  final MockHttpHeaders headers = MockHttpHeaders();

  testWidgets('Headers', (WidgetTester tester) async {
    HttpOverrides.runZoned<Future<void>>(() async {
      // await tester.pumpWidget(Image.network(
      //   'https://www.example.com/images/frame.png',
      //   headers: const <String, String>{'flutter': 'flutter'},
      // ));

      await tester.pumpWidget(CachedNetworkImage(
          imageUrl: 'https://www.example.com/images/frame.png',
          errorWidget: (context, err, o) {
            print(
                "===========>>>>> CachedNetworkImage error= $err <<<<=================");
          }));
    }, createHttpClient: (SecurityContext _) {
      when(client.getUrl(any)).thenAnswer((invocation) {
        print(
            "================>>>>>> getUrl = ${invocation.positionalArguments}  <<<<<===============");
        return Future<HttpClientRequest>.value(request);
      });
      when(request.headers).thenReturn(headers);
      when(request.close()).thenAnswer((invocation) {
        print(
            "================>>>>>> request.close = ${invocation.toString()}  <<<<<===============");
        return Future<HttpClientResponse>.value(response);
      });
      when(response.contentLength).thenReturn(kTransparentImage.length);
      when(response.statusCode).thenReturn(HttpStatus.ok);
      when(response.listen(any)).thenAnswer((Invocation invocation) {
        final void Function(List<int>) onData =
            invocation.positionalArguments[0] as void Function(List<int>);
        print(
            "================>>>>>> onData = ${onData}  <<<<<===============");
        final void Function() onDone =
            invocation.namedArguments[#onDone] as void Function();
        print(
            "================>>>>>> onDone = ${onDone}  <<<<<===============");
        final void Function(Object, [StackTrace]) onError = invocation
            .namedArguments[#onError] as void Function(Object, [StackTrace]);
        final bool cancelOnError =
            invocation.namedArguments[#cancelOnError] as bool;
        return Stream<List<int>>.fromIterable(<List<int>>[kTransparentImage])
            .listen(onData,
                onDone: onDone, onError: onError, cancelOnError: cancelOnError);
      });
      return client;
    });
  }, skip: isBrowser);
}

class MockHttpClient extends Mock implements HttpClient {}

class MockHttpClientRequest extends Mock implements HttpClientRequest {}

class MockHttpClientResponse extends Mock implements HttpClientResponse {}

class MockHttpHeaders extends Mock implements HttpHeaders {}

Directory directory;
const MethodChannel channel = MethodChannel('com.tekartik.sqflite');
final List<MethodCall> log = <MethodCall>[];
bool setupDone = false;

Future<void> setup() async {
  // WidgetsFlutterBinding.ensureInitialized();
  if (setupDone) {
    return;
  }
  directory = await Directory.systemTemp.createTemp();
  String response;
  channel.setMockMethodCallHandler((MethodCall methodCall) async {
    print("METHOD CALL: $methodCall");
    log.add(methodCall);
    switch (methodCall.method) {
      case "getDatabasesPath":
        return directory.path;
        break;
      case "query":
        return 1;
        break;
     }
    return response;
}