public void GetValueOptions_A1InEmptyBoard_ReturnsAllValues()
{
// arrange
var v = new Board();
var expected = Values.One | Values.Two | Values.Three
| Values.Four | Values.Five | Values.Six
| Values.Seven | Values.Eight | Values.Nine;
// act
var result = v.GetValueOptions(Columns.A, Rows.One)
.Aggregate((v1, v2) => v1 | v2)
;
// assert
Assert.AreEqual(expected, result);
}