public void CalculateMultipliersOfSplitStringTests()
{
// Arrange
var splitString1 = new string[] { "three", "two hundred and sixty seven",
"nine hundred and ninety nine", "nine hundred and ninety nine", "minus" };
var expectedResult1 = new int[] { 3, 267, 999, 999, -1 };
var splitString2 = new string[] { null, null, null, "seven", "negative" };
var expectedResult2 = new int[] { 0, 0, 0, 7, -1 };
var splitString3 = new string[] { null, null, null, "four", null };
var expectedResult3 = new int[] { 0, 0, 0, 4, 1 };
// Act
var actualResult1 = converterHelper.CalculateMultipliersOfSplitString(splitString1);
var actualResult2 = converterHelper.CalculateMultipliersOfSplitString(splitString2);
var actualResult3 = converterHelper.CalculateMultipliersOfSplitString(splitString3);
// Assert
Assert.AreEqual(expectedResult1, actualResult1);
Assert.AreEqual(expectedResult2, actualResult2);
Assert.AreEqual(expectedResult3, actualResult3);
}