public async Task Change_Profile_Image()
{
session.Returns(await Json.FromFile("data\\users\\accountprofile.txt"));
session.ExpectPost("https://api.twitter.com/1.1/account/update_profile_image.json");
var user = await session.ChangeAccountProfileImage("test.jpg", new byte[]{});
Assert.IsNotNull(user);
user.UserId.ShouldBeEquivalentTo(776627022);
}