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Project Finished #18

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45 changes: 43 additions & 2 deletions src/RomanNumerals.java
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Original file line number Diff line number Diff line change
@@ -1,8 +1,49 @@
import java.util.HashMap;

public class RomanNumerals {
public int convertToInteger(String romanNum) {
public static int convertToInteger(String romanNum) {
// To be Implemented
return 0;

HashMap<String, Integer> hashMap = new HashMap<String, Integer>();
hashMap.put("I",1);
hashMap.put("IV",4);
hashMap.put("V",5);
hashMap.put("IX",9);
hashMap.put("X",10);
hashMap.put("XL",40);
hashMap.put("L",50);
hashMap.put("XC",90);
hashMap.put("C",100);
hashMap.put("CD",400);
hashMap.put("D",500);
hashMap.put("CM",900);
hashMap.put("M",1000);

int i = 0;
int arabicNum = 0;
int subsequence = 0;

while(i<romanNum.length()){
if(i<romanNum.length()-1){
if(hashMap.containsKey(romanNum.subSequence(i,i+2))){
subsequence = hashMap.get(romanNum.subSequence(i,i+2));
arabicNum += subsequence;
i += 2;
}
else{
subsequence = hashMap.get(romanNum.subSequence(i,i+1));
arabicNum += subsequence;
i += 1;
}
}
else{
subsequence = hashMap.get(romanNum.subSequence(i,i+1));
arabicNum += subsequence;
i += 1;
}
}

return arabicNum;

}
}
183 changes: 180 additions & 3 deletions tests/TestRomanNumerals.java
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Original file line number Diff line number Diff line change
Expand Up @@ -3,10 +3,187 @@
import org.junit.Test;

public class TestRomanNumerals {


RomanNumerals num = new RomanNumerals();

@Test
public void test_I_1() {
int romanNum = RomanNumerals.convertToInteger("I");
assertEquals(1,romanNum);
}

@Test
public void test_II_2() {
int romanNum = RomanNumerals.convertToInteger("II");
assertEquals(2,romanNum);
}

@Test
public void test_III_3() {
int romanNum = RomanNumerals.convertToInteger("III");
assertEquals(3,romanNum);
}

@Test
public void test_IV_4() {
int romanNum = RomanNumerals.convertToInteger("IV");
assertEquals(4,romanNum);
}

@Test
public void test_V_5() {
int romanNum = RomanNumerals.convertToInteger("V");
assertEquals(5,romanNum);
}

@Test
public void test_VI_6() {
int romanNum = RomanNumerals.convertToInteger("VI");
assertEquals(6,romanNum);
}

@Test
public void test_VII_7() {
int romanNum = RomanNumerals.convertToInteger("VII");
assertEquals(7,romanNum);
}

@Test
public void test_VIII_8() {
int romanNum = RomanNumerals.convertToInteger("VIII");
assertEquals(8,romanNum);
}

@Test
public void test_IX_9() {
int romanNum = RomanNumerals.convertToInteger("IX");
assertEquals(9,romanNum);
}

@Test
public void test_X_10() {
int romanNum = RomanNumerals.convertToInteger("X");
assertEquals(10,romanNum);
}

@Test
public void test_XX_20() {
int romanNum = RomanNumerals.convertToInteger("XX");
assertEquals(20,romanNum);
}

@Test
public void test_XXX_30() {
int romanNum = RomanNumerals.convertToInteger("XXX");
assertEquals(30,romanNum);
}

@Test
public void test_XL_40() {
int romanNum = RomanNumerals.convertToInteger("XL");
assertEquals(40,romanNum);
}

@Test
public void test_L_50() {
int romanNum = RomanNumerals.convertToInteger("L");
assertEquals(50,romanNum);
}

@Test
public void test_LX_60() {
int romanNum = RomanNumerals.convertToInteger("LX");
assertEquals(60,romanNum);
}

@Test
public void test_LXX_70() {
int romanNum = RomanNumerals.convertToInteger("LXX");
assertEquals(70,romanNum);
}

@Test
public void test_LXXX_80() {
int romanNum = RomanNumerals.convertToInteger("LXXX");
assertEquals(80,romanNum);
}

@Test
public void test_XC_90() {
int romanNum = RomanNumerals.convertToInteger("XC");
assertEquals(90,romanNum);
}

@Test
public void test_C_100() {
int romanNum = RomanNumerals.convertToInteger("C");
assertEquals(100,romanNum);
}

@Test
public void test_CC_200() {
int romanNum = RomanNumerals.convertToInteger("CC");
assertEquals(200,romanNum);
}

@Test
public void test_CCC_300() {
int romanNum = RomanNumerals.convertToInteger("CCC");
assertEquals(300,romanNum);
}

@Test
public void test_CD_400() {
int romanNum = RomanNumerals.convertToInteger("CD");
assertEquals(400,romanNum);
}

@Test
public void test_D_500() {
int romanNum = RomanNumerals.convertToInteger("D");
assertEquals(500,romanNum);
}

@Test
public void test_DC_600() {
int romanNum = RomanNumerals.convertToInteger("DC");
assertEquals(600,romanNum);
}

@Test
public void test_DCC_700() {
int romanNum = RomanNumerals.convertToInteger("DCC");
assertEquals(700,romanNum);
}

@Test
public void test_DCCC_800() {
int romanNum = RomanNumerals.convertToInteger("DCCC");
assertEquals(800,romanNum);
}

@Test
public void test_CM_900() {
int romanNum = RomanNumerals.convertToInteger("CM");
assertEquals(900,romanNum);
}

@Test
public void test_M_1000() {
int romanNum = RomanNumerals.convertToInteger("M");
assertEquals(1000,romanNum);
}

@Test
public void test_MCMLXXXIV_1984() {
int romanNum = RomanNumerals.convertToInteger("MCMLXXXIV");
assertEquals(1984,romanNum);
}

@Test
public void test() {
fail("Not yet implemented");
public void test_MMXIV_2014() {
int romanNum = RomanNumerals.convertToInteger("MMXIV");
assertEquals(2014,romanNum);
}

}