internal static void AssertProxy(DefaultConnection connection, Proxy proxy)
{
HttpClient httpClient = (HttpClient)connection.GetPrivateField("_httpClient");
HttpClientHandler handler = (HttpClientHandler)httpClient.GetPrivateField <HttpMessageInvoker>("handler");
Assert.That(handler.UseProxy, Is.True);
Assert.That(((WebProxy)handler.Proxy).Address, Is.EqualTo(proxy.Uri));
Assert.That(((NetworkCredential)handler.Proxy.Credentials), Is.Null);
}