public async Task AuthHandler_Selects_UsernamePassword()
{
string username = "******";
string password = "******";
var expectedAuth = AuthenticationHandler.EncodeCredentials(username, password);
var handler = new AuthenticationHandler(null, null, NullLogger.Instance);
handler.SetCredentials(username, password);
var fakeHandler = new FakeRequireAuthHandler("Basic", null, expectedAuth);
handler.InnerHandler = fakeHandler;
var invoker = new HttpMessageInvoker(handler);
var response = await invoker.SendAsync(new HttpRequestMessage(), CancellationToken.None);
response.EnsureSuccessStatusCode();
}