HttpClient Unit Testing

Decorate Http Client for unit test

public interface ICustomHttpClient
    {
        Task<HttpResponseMessage> GetAsync(string url, int timeout);
    }
    
     //Decorating HttpClient in order to mock it
    public class CustomHttpClient : ICustomHttpClient
    {
        public CustomHttpClient()
        {
        }

        public async Task<HttpResponseMessage> GetAsync(string url, int timeout)
        {
            using (var client = new HttpClient())
            {
                client.Timeout = TimeSpan.FromSeconds(timeout);
                return await client.GetAsync(url);
            }
        }
    }