public void UnitFormatter_When_InputIs2Digits_Then_ResultIsInvalidDigitsException()
{
// arrange
var formatter = new UnitFormatter();
// act
// assert
Assert.Throws<InvalidDigitsException>(() => formatter.Format(10));
}
public void UnitFormatter_When_InputIs1Digit_Then_ResultIsNoException()
{
// arrange
var formatter = new UnitFormatter();
// act
// assert
Assert.DoesNotThrow(() => formatter.Format(9));
}
public void UnitFormatter_When_InputIs9_Then_ResultIsNine()
{
// arrange
var formatter = new UnitFormatter();
// act
var value = formatter.Format(9);
// assert
Assert.That(value, Is.EqualTo("nine"));
}