RomanNumeralsTest.java

import org.junit.Test;
import org.junit.Ignore;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;

import java.util.Arrays;
import java.util.Collection;

import static org.junit.Assert.assertEquals;

@RunWith(Parameterized.class)
public class RomanNumeralsTest {

    private int arabicNumeral;
    private String romanNumeral;

    @Parameters(name = "{index}: expected arabic numeral {0} to be converted to roman numeral \"{1}\".")
    public static Collection<Object[]> data() {
        return Arrays.asList(new Object[][]{
                {0, ""},
                {1, "I"},
                {2, "II"},
                {3, "III"},
                {4, "IV"},
                {5, "V"},
                {6, "VI"},
                {9, "IX"},
                {27, "XXVII"},
                {48, "XLVIII"},
                {59, "LIX"},
                {93, "XCIII"},
                {141, "CXLI"},
                {163, "CLXIII"},
                {402, "CDII"},
                {575, "DLXXV"},
                {911, "CMXI"},
                {1024, "MXXIV"},
                {3000, "MMM"}
        });
    }

    public RomanNumeralsTest(int arabicNumeral, String romanNumeral) {
        this.arabicNumeral = arabicNumeral;
        this.romanNumeral = romanNumeral;
    }


    @Test
    public void convertArabicNumberalToRomanNumeral() {
        RomanNumeral romanNumeral = new RomanNumeral(arabicNumeral);

        assertEquals(this.romanNumeral, romanNumeral.getRomanNumeral());
    }
}