Flutter testing with mockito and injectable - flutter

Question

I'm learing test writing with mockito but i have some problems with testing remote_data_source_class.
Here's my abstract class
abstract class ApiRemoteDataSource {
Future<PokemonsListResponseModel> getPokemons();
}
Here's the implementation
import 'dart:convert';
import 'package:injectable/injectable.dart';
import 'package:http/http.dart' as http;
import '../../models/pokemons_list_response_model.dart';
import 'api_remote_data_source.dart';
#Injectable(as: ApiRemoteDataSource)
class ApiRemoteDataSourceImpl implements ApiRemoteDataSource {
ApiRemoteDataSourceImpl(this.client);
final http.Client client;
final pokemonListUrl = Uri.parse('https://pokeapi.co/api/v2/pokemon');
#override
Future<PokemonsListResponseModel> getPokemons() async {
final response = await client.get(pokemonListUrl);
final data = response.body;
final modelData = PokemonsListResponseModel.fromJson(json.decode(data));
return modelData;
}
}
Now Iwant to verify that when i invoke method .getPokemons() on mock data source my http.Client will execute a call to given endpoint:
#GenerateMocks([http.Client, ApiRemoteDataSource])
void main() {
late ApiRemoteDataSource dataSource;
late MockClient mockHttpClient;
setUp(() async {
await configureDependencies();
mockHttpClient = MockClient();
dataSource = MockApiRemoteDataSource();
print('test: $mockHttpClient, data source $dataSource');
});
group('getPokemonsList', () {
test('Should perform a GET request on a URL', () async {
final url = Uri.parse('https://pokeapi.co/api/v2/pokemon');
// arrange
when(mockHttpClient.get(url, headers: anyNamed('headers')))
.thenAnswer((_) async => http.Response(fixture('pokemon_list.json'), 200));
// act
dataSource.getPokemons();
// assert
verify(mockHttpClient.get(Uri.parse('https://pokeapi.co/api/v2/pokemon')));
});
});
}
Running test above gives me this error: "MissingStubError: 'getPokemons'
No stub was found which matches the arguments of this method call:
getPokemons()"
When i replace dataSource.getPokemons() in //act part with "mockHttpClient.get(url)" everything works but I'm not sure if that kind of test is valid