public async Task Delete_Friendship()
{
// arrange
session.Returns(await Json.FromFile("data\\friendsfollowers\\createfriendshipresponse.txt"));
session.ExpectGet("https://api.twitter.com/1.1/post/friendships/destroy.json");
var cfsr = await session.DeleteFriendship("testscreenname", 345);
Assert.IsNotNull(cfsr);
cfsr.Name.ShouldBeEquivalentTo("Doug Williams");
}