public async Task Change_Friendship()
{
// arrange
session.Returns(await Json.FromFile("data\\friendsfollowers\\userstatus.txt"));
session.ExpectPost("https://api.twitter.com/1.1/friendships/update.json");
var updatefs = await session.ChangeFriendship("testscreenname", 345);
Assert.IsNotNull(updatefs);
updatefs.Relationship.Source.CanDM.Should().BeTrue();
updatefs.Relationship.Target.FollowedBy.Should().BeTrue();
}