public void SHOULD_return_value_subtracted_from_main_letter_by_subtrahend()
{
var minuend = Letters.X;
var subtrahend = Letters.I;
var sut = new Lib.SubtractionChunk(minuend, subtrahend, 1);
Assert.That(sut.Value, Is.EqualTo(9));
}
public void SHOULD_return_minuend_as_main_letter()
{
var minuend = Letters.X;
var subtrahend = Letters.I;
var sut = new Lib.SubtractionChunk(minuend, subtrahend, 1);
Assert.That(sut.MainLetter, Is.EqualTo(minuend));
}
public void SHOULD_throw_ArgumentOutOfRange_exception_if_repetitions_count_not_1(int repetitionsCount)
{
var mainLetter = Letters.X;
var addition = Letters.I;
Assert.Throws <ArgumentOutOfRangeException>(() =>
{
var sut = new Lib.SubtractionChunk(mainLetter, addition, repetitionsCount);
});
}
public void SHOULD_throw_exception_if_subtrahend_is_not_valid_neighbour()
{
var minuend = Letters.M;
var subtrahend = Letters.I;
Assert.Throws <ArgumentException>(() =>
{
var sut = new Lib.SubtractionChunk(minuend, subtrahend, 1);
});
}