public void ToArabic_return_8_when_VIII()
{
var target = new NumeralConverter();
var actual = target.ToArabic("VIII");
Assert.AreEqual(8, actual);
}
public void ToArabic_return_9_when_IX()
{
var target = new NumeralConverter();
var actual = target.ToArabic("IX");
Assert.AreEqual(9, actual);
}
public void ToArabic_return_3888_when_MMMDCCCLXXXVIII()
{
var target = new NumeralConverter();
var actual = target.ToArabic("MMMDCCCLXXXVIII");
Assert.AreEqual(3888, actual);
}
public void ToArabic_return_2016_when_MMXVI()
{
var target = new NumeralConverter();
var actual = target.ToArabic("MMXVI");
Assert.AreEqual(2016, actual);
}
public void ToArabic_return_50_when_L()
{
var target = new NumeralConverter();
var actual = target.ToArabic("L");
Assert.AreEqual(50, actual);
}
public void ToArabic_returns_0_when_empty_string()
{
var target = new NumeralConverter();
var actual = target.ToArabic("");
Assert.AreEqual(0, actual);
}
public static string Add(string addend1, string addend2)
{
var numericAddend1 = NumeralConverter.ToArabic(addend1);
var numericAddend2 = NumeralConverter.ToArabic(addend2);
var sum = numericAddend1 + numericAddend2;
return(ArabicConverter.ToNumeral(sum));
}
public void ConvertToArabic_CaseIsIgnored()
{
const string numeral = "xxV";
var expected = 25;
var result = NumeralConverter.ToArabic(numeral);
result.Should().Be(expected);
}
public void ConvertToArabic_WhenPassedSubtractiveNumeral_ReturnsCorrectIntegerValue()
{
const string numeral = "IV";
var expected = 4;
var result = NumeralConverter.ToArabic(numeral);
result.Should().Be(expected);
}
public void ConvertToArabic_WhenPassedIIReturns2()
{
const string numeral = "II";
var expected = 2;
var result = NumeralConverter.ToArabic(numeral);
result.Should().Be(expected);
}
public void ConvertToArabic_WhenPassedNumeralWithIllegalCharacterRepetitions_Throws()
{
const string numeral1 = "IIII";
const string numeral2 = "DD";
const string numeral3 = "VIIII";
Assert.Throws <ArgumentException>(() => NumeralConverter.ToArabic(numeral1));
Assert.Throws <ArgumentException>(() => NumeralConverter.ToArabic(numeral2));
Assert.Throws <ArgumentException>(() => NumeralConverter.ToArabic(numeral3));
}
public void ConvertToArabic_WhenPassedNumeralWithIllegalCharacters_Throws()
{
const string badNumeral = "WAT";
Assert.Throws <ArgumentException>(() => NumeralConverter.ToArabic(badNumeral));
}
public void ToArabic_throws_exception_when_InvalidFormat()
{
var target = new NumeralConverter();
target.ToArabic("IIX");
}
public void ToArabic_throws_exception_when_InvalidCharater()
{
var target = new NumeralConverter();
target.ToArabic("S");
}