public void UpdateTest_Spr()
{
Sprite target = new Sprite();
TimeSpan span = new TimeSpan(0,0,0,0,100); //100 milisecond
GameTime theGameTime = new GameTime(span, span);
Vector2 theSpeed = new Vector2(160, 0);
Vector2 theDirection = new Vector2(-1, 0);
Vector2 lastPos = target.getPos();
target.Update(theGameTime, theSpeed, theDirection);
Assert.IsFalse(lastPos == target.getPos());
}