public void Then_ValidOffset_ValidMovedOffset()
{
//Arrange
var sut = new Offset(-1, 1);
//Act
var result = sut.Then(Offset.BottomBy(2)).Then(Offset.RightBy(1));
//Assert
Assert.Equal((0, -1), (result.X, result.Y));
}
public void BottomBy_NegativeValue_PositiveY()
{
//Arrange
var sut = Offset.BottomBy(-1);
//Act
var(x, y) = sut;
//Assert
Assert.Equal(0, x);
Assert.Equal(1, y);
}