InternetCaller.cs

using System;
using System.Net;
using System.Net.Http;
using System.Threading.Tasks;

namespace HttpClientTest.Class
{
    public interface ICallTheInternet
    {
        public Task<bool> GetWithNamedClient(string clientName, string url, HttpStatusCode expectedStatusCode);
        public Task<bool> GetWithClient(HttpClient client, string url, HttpStatusCode expectedStatusCode);
    }

    public class InternetCaller : ICallTheInternet
    {
        private readonly IHttpClientFactory _httpClientFactory;

        public InternetCaller(IHttpClientFactory httpClientFactory)
        {
            _httpClientFactory = httpClientFactory ?? throw new ArgumentNullException(nameof(httpClientFactory));
        }

        public async Task<bool> GetWithClient(HttpClient client, string url, HttpStatusCode expectedStatusCode)
        {
            var result = await client.GetAsync(url);
            return result.StatusCode == expectedStatusCode;
        }

        public Task<bool> GetWithNamedClient(string clientName, string url, HttpStatusCode expectedStatusCode)
        {
            var httpClient = _httpClientFactory.CreateClient(clientName);
            return GetWithClient(httpClient, url, expectedStatusCode);
        }
    }
}