public void SendAsync_RequestNull()
        {
            var client = new Mock <IHttpClient>(MockBehavior.Strict).Object;
            var uut    = new HttpServiceSendRequest(client);

            Assert.ThrowsAsync <ArgumentNullException>(
                async() => await uut.SendAsync(null)
                );
        }
        public async Task SendAsync()
        {
            var request  = new HttpRequestMessage();
            var response = new HttpResponseMessage();
            var client   = new Mock <IHttpClient>(MockBehavior.Strict);

            client.Setup(n => n.SendAsync(request)).ReturnsAsync(response);
            var uut    = new HttpServiceSendRequest(client.Object);
            var result = await uut.SendAsync(request);
        }