public async Task Post_RequestUrlAndAuthHeader_RequestMessageUriSet()
{
// Arrange
const string requestUrl = "http://abc123.def/456";
const string formData = "ghi=789";
HttpRequestMessage message = null;
var mockHttpMessageHandler = new Mock <HttpMessageHandler>();
mockHttpMessageHandler.Protected()
.Setup <Task <HttpResponseMessage> >("SendAsync", ItExpr.IsAny <HttpRequestMessage>(),
ItExpr.IsAny <CancellationToken>())
.Returns(Task <HttpResponseMessage> .Factory.StartNew(() =>
new HttpResponseMessage(HttpStatusCode.OK)
{
Content = new StringContent("{}")
}))
.Callback((HttpRequestMessage m, CancellationToken t) => message = m);
var http = new RestHttpClient(new HttpClient(mockHttpMessageHandler.Object));
// Act
await http.Post(requestUrl, formData);
// Assert
Assert.AreEqual(requestUrl, message.RequestUri.ToString());
}