diff --git a/.besouro/20160928160354283/actions.txt b/.besouro/20160928160354283/actions.txt
new file mode 100644
index 0000000..96968db
--- /dev/null
+++ b/.besouro/20160928160354283/actions.txt
@@ -0,0 +1,307 @@
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diff --git a/.besouro/20160928160354283/besouroEpisodes.txt b/.besouro/20160928160354283/besouroEpisodes.txt
new file mode 100644
index 0000000..e69de29
diff --git a/.besouro/20160928160354283/disagreements.txt b/.besouro/20160928160354283/disagreements.txt
new file mode 100644
index 0000000..e69de29
diff --git a/.besouro/20160928160354283/randomHeuristicEpisodes.txt b/.besouro/20160928160354283/randomHeuristicEpisodes.txt
new file mode 100644
index 0000000..e69de29
diff --git a/.besouro/20160928160354283/userComments.txt b/.besouro/20160928160354283/userComments.txt
new file mode 100644
index 0000000..e69de29
diff --git a/.besouro/20160928160354283/zorroEpisodes.txt b/.besouro/20160928160354283/zorroEpisodes.txt
new file mode 100644
index 0000000..e69de29
diff --git a/.besouro/20160928170751466/actions.txt b/.besouro/20160928170751466/actions.txt
new file mode 100644
index 0000000..83455c1
--- /dev/null
+++ b/.besouro/20160928170751466/actions.txt
@@ -0,0 +1,271 @@
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diff --git a/.besouro/20160928170751466/besouroEpisodes.txt b/.besouro/20160928170751466/besouroEpisodes.txt
new file mode 100644
index 0000000..dc7603f
--- /dev/null
+++ b/.besouro/20160928170751466/besouroEpisodes.txt
@@ -0,0 +1,57 @@
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diff --git a/.besouro/20160928170751466/disagreements.txt b/.besouro/20160928170751466/disagreements.txt
new file mode 100644
index 0000000..e69de29
diff --git a/.besouro/20160928170751466/randomHeuristicEpisodes.txt b/.besouro/20160928170751466/randomHeuristicEpisodes.txt
new file mode 100644
index 0000000..058565b
--- /dev/null
+++ b/.besouro/20160928170751466/randomHeuristicEpisodes.txt
@@ -0,0 +1,20 @@
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diff --git a/.besouro/20160928170751466/userComments.txt b/.besouro/20160928170751466/userComments.txt
new file mode 100644
index 0000000..e69de29
diff --git a/.besouro/20160928170751466/zorroEpisodes.txt b/.besouro/20160928170751466/zorroEpisodes.txt
new file mode 100644
index 0000000..6a3e302
--- /dev/null
+++ b/.besouro/20160928170751466/zorroEpisodes.txt
@@ -0,0 +1,20 @@
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diff --git a/.besouro/20161005142856393/actions.txt b/.besouro/20161005142856393/actions.txt
new file mode 100644
index 0000000..db8f024
--- /dev/null
+++ b/.besouro/20161005142856393/actions.txt
@@ -0,0 +1,146 @@
+FileOpenedAction 1475666936652 TestRomanNumerals.java 7314 51 81 30
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+EditAction 1475671371660 TestRomanNumerals.java 8003 55 85 30
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diff --git a/.besouro/20161005142856393/besouroEpisodes.txt b/.besouro/20161005142856393/besouroEpisodes.txt
new file mode 100644
index 0000000..82099f7
--- /dev/null
+++ b/.besouro/20161005142856393/besouroEpisodes.txt
@@ -0,0 +1,112 @@
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diff --git a/.besouro/20161005142856393/disagreements.txt b/.besouro/20161005142856393/disagreements.txt
new file mode 100644
index 0000000..e69de29
diff --git a/.besouro/20161005142856393/randomHeuristicEpisodes.txt b/.besouro/20161005142856393/randomHeuristicEpisodes.txt
new file mode 100644
index 0000000..38cc6b5
--- /dev/null
+++ b/.besouro/20161005142856393/randomHeuristicEpisodes.txt
@@ -0,0 +1,7 @@
+1475668297773 test-first 3 1361 true
+1475670847429 test-first 3 2529 true
+1475671101952 test-first 3 247 true
+1475671187048 refactoring 2A 45 false
+1475671220425 regression 1 0 true
+1475671350156 test-addition 2 48 true
+1475671373910 refactoring 1B 3 false
diff --git a/.besouro/20161005142856393/userComments.txt b/.besouro/20161005142856393/userComments.txt
new file mode 100644
index 0000000..e69de29
diff --git a/.besouro/20161005142856393/zorroEpisodes.txt b/.besouro/20161005142856393/zorroEpisodes.txt
new file mode 100644
index 0000000..da1e548
--- /dev/null
+++ b/.besouro/20161005142856393/zorroEpisodes.txt
@@ -0,0 +1,7 @@
+1475668297773 test-first 3 1361 true
+1475670847429 test-first 3 2549 true
+1475671101952 test-first 3 254 true
+1475671187048 refactoring 2A 85 true
+1475671220425 regression 1 33 true
+1475671350156 test-addition 2 129 true
+1475671373910 refactoring 1B 23 true
diff --git a/.besouro/20161005154353371/actions.txt b/.besouro/20161005154353371/actions.txt
new file mode 100644
index 0000000..2490804
--- /dev/null
+++ b/.besouro/20161005154353371/actions.txt
@@ -0,0 +1,7 @@
+FileOpenedAction 1475671433467 RomanNumerals.java 2790 6 15 0
+EditAction 1475671547447 RomanNumerals.java 2679 6 15 0
+UnitTestCaseAction 1475671550180 TestRomanNumerals.java FAIL
+UnitTestSessionAction 1475671550182 TestRomanNumerals.java FAIL
+EditAction 1475671650813 RomanNumerals.java 2937 6 15 0
+UnitTestCaseAction 1475671659600 TestRomanNumerals.java OK
+UnitTestSessionAction 1475671659601 TestRomanNumerals.java OK
diff --git a/.besouro/20161005154353371/besouroEpisodes.txt b/.besouro/20161005154353371/besouroEpisodes.txt
new file mode 100644
index 0000000..7580e4f
--- /dev/null
+++ b/.besouro/20161005154353371/besouroEpisodes.txt
@@ -0,0 +1 @@
+1475671659601 refactoring 2A 226 true
diff --git a/.besouro/20161005154353371/disagreements.txt b/.besouro/20161005154353371/disagreements.txt
new file mode 100644
index 0000000..e69de29
diff --git a/.besouro/20161005154353371/randomHeuristicEpisodes.txt b/.besouro/20161005154353371/randomHeuristicEpisodes.txt
new file mode 100644
index 0000000..7580e4f
--- /dev/null
+++ b/.besouro/20161005154353371/randomHeuristicEpisodes.txt
@@ -0,0 +1 @@
+1475671659601 refactoring 2A 226 true
diff --git a/.besouro/20161005154353371/userComments.txt b/.besouro/20161005154353371/userComments.txt
new file mode 100644
index 0000000..e69de29
diff --git a/.besouro/20161005154353371/zorroEpisodes.txt b/.besouro/20161005154353371/zorroEpisodes.txt
new file mode 100644
index 0000000..1720a71
--- /dev/null
+++ b/.besouro/20161005154353371/zorroEpisodes.txt
@@ -0,0 +1 @@
+1475671659601 refactoring 2A 226 false
diff --git a/src/RomanNumerals.java b/src/RomanNumerals.java
index 20904f0..7b0f31d 100644
--- a/src/RomanNumerals.java
+++ b/src/RomanNumerals.java
@@ -1,8 +1,121 @@
 
 public class RomanNumerals {
 	public int convertToInteger(String romanNum) {
-		// To be Implemented
-		return 0;
+		if (romanNum == null)
+			throw new NumberFormatException("Null roman numeral.");
 		
+		if (romanNum.isEmpty())
+			throw new NumberFormatException("Empty roman numeral.");
+		
+		int retValue = 0;
+		int duplicates = 0;
+		
+		// Check illegal duplicate numerals
+		for (int i = 01; i < romanNum.length(); i++) {
+			if (i > 0)
+				duplicates = (romanNum.charAt(i - 1) == romanNum.charAt(i)) ? duplicates + 1 : 0;
+			
+			if (duplicates >= 1 && isOneTimeRepeatable(romanNum.charAt(i)))
+				throw new NumberFormatException("Too many duplicate numeral characters.");
+			
+			if (duplicates >= 3 && isThreeTimesRepeatable(romanNum.charAt(i)))
+				throw new NumberFormatException("Too many duplicate numeral characters.");
+		}
+		
+		// Process additions and subtractions
+		for (int i = romanNum.length() - 1; i >= 0; i--) {
+			char c0 = romanNum.charAt(i);
+			
+			int subtrahend = 0;
+			
+			for (int j = i - 1; j >= 0; j--) {
+				char c1 = romanNum.charAt(j);
+				if (canBeSubtrahendElementaryValue(c1) && getElementaryValue(c0) > getElementaryValue(c1)) {
+					int diff = getElementaryIndex(c0) - getElementaryIndex(c1);
+					
+					if (diff > 2)
+						throw new NumberFormatException("Illegal subtraction format.");
+					
+					if (subtrahend != 0)
+						throw new NumberFormatException("Illegal multiple subtractions.");
+					
+					subtrahend = getElementaryValue(c1);
+					// Consume subtrahend(s)
+					i--;
+				} else if (!canBeSubtrahendElementaryValue(c1)) {
+					// V, L, D cannot be subtracted
+					if (getElementaryValue(c1) < getElementaryValue(c0))
+						throw new NumberFormatException("Illegal subtraction format.");
+					
+					break;
+				}
+			}
+			
+			retValue += getElementaryValue(c0) - subtrahend;
+		}
+		
+		return retValue;
+	}
+	
+	private boolean canBeSubtrahendElementaryValue(char character) {
+		switch(character) {
+		case 'I':
+		case 'X':
+		case 'C':
+			return true;
+		}
+		
+		return false;
+	}
+
+	private boolean isOneTimeRepeatable(char character) {
+		switch(character) {
+		case 'V':
+		case 'L':
+		case 'D':
+			return true;
+		}
+		
+		return false;
+	}
+	
+	private boolean isThreeTimesRepeatable(char character) {
+		switch(character) {
+		case 'I':
+		case 'X':
+		case 'C':
+		case 'M':
+			return true;
+		}
+		
+		return false;
+	}
+
+	private int getElementaryValue(char character) {
+		switch(character) {
+		case 'I': return 1;
+		case 'V': return 5;
+		case 'X': return 10;
+		case 'L': return 50;
+		case 'C': return 100;
+		case 'D': return 500;
+		case 'M': return 1000;
+		default:
+			throw new NumberFormatException("Invalid numeral character.");
+		}
+	}
+	
+	private int getElementaryIndex(char character) {
+		switch(character) {
+		case 'I': return 0;
+		case 'V': return 1;
+		case 'X': return 2;
+		case 'L': return 3;
+		case 'C': return 4;
+		case 'D': return 5;
+		case 'M': return 6;
+		default:
+			throw new NumberFormatException("Invalid numeral character.");
+		}
 	}
 }
diff --git a/tests/TestRomanNumerals.java b/tests/TestRomanNumerals.java
index 5d1de75..1344d4b 100644
--- a/tests/TestRomanNumerals.java
+++ b/tests/TestRomanNumerals.java
@@ -1,12 +1,312 @@
 import static org.junit.Assert.*;
 
+import org.junit.Before;
 import org.junit.Test;
 
 public class TestRomanNumerals {
+	RomanNumerals mNumerals;
+	
+	@Before
+	public void initialize() {
+		mNumerals = new RomanNumerals();
+	}
+
+	@Test(expected=NumberFormatException.class)
+	public void testConvertInteger_IllegalSubtraction_DM_Throw_NumberFormatException() {
+		mNumerals.convertToInteger("DM");
+	}
+	
+	@Test(expected=NumberFormatException.class)
+	public void testConvertInteger_IllegalSubtraction_LC_Throw_NumberFormatException() {
+		mNumerals.convertToInteger("LC");
+	}
+	
+	@Test(expected=NumberFormatException.class)
+	public void testConvertInteger_IllegalSubtraction_VX_Throw_NumberFormatException() {
+		mNumerals.convertToInteger("VX");
+	}
+	
+	@Test(expected=NumberFormatException.class)
+	public void testConvertInteger_IllegalSubtraction_XXC_Throw_NumberFormatException() {
+		mNumerals.convertToInteger("XXC");
+	}
+	
+	@Test(expected=NumberFormatException.class)
+	public void testConvertIntegerNull_Throw_NumberFormatException() {
+		mNumerals.convertToInteger(null);
+	}
+
+	@Test(expected=NumberFormatException.class)
+	public void testConvertIntegerEmpty_Throw_NumberFormatException() {
+		mNumerals.convertToInteger("");
+	}
+	
+	@Test(expected=NumberFormatException.class)
+	public void testConvertInteger_Throw_NumberFormatException() {
+		mNumerals.convertToInteger("IO");
+	}
+
+	@Test(expected=NumberFormatException.class)
+	public void testConvertInteger_IL_Throw_NumberFormatException() {
+		mNumerals.convertToInteger("IL");
+	}
+
+	@Test(expected=NumberFormatException.class)
+	public void testConvertInteger_IC_Throw_NumberFormatException() {
+		mNumerals.convertToInteger("IC");
+	}
+
+	@Test(expected=NumberFormatException.class)
+	public void testConvertInteger_ID_Throw_NumberFormatException() {
+		mNumerals.convertToInteger("ID");
+	}
+	
+	@Test(expected=NumberFormatException.class)
+	public void testConvertInteger_IM_Throw_NumberFormatException() {
+		mNumerals.convertToInteger("IM");
+	}
+	
+	@Test(expected=NumberFormatException.class)
+	public void testConvertInteger_XD_Throw_NumberFormatException() {
+		mNumerals.convertToInteger("XD");
+	}
+
+	@Test(expected=NumberFormatException.class)
+	public void testConvertInteger_XM_Throw_NumberFormatException() {
+		mNumerals.convertToInteger("XM");
+	}
+
+	@Test(expected=NumberFormatException.class)
+	public void testConvertIntegerContains_VV_Throw_NumberFormatException() {
+		mNumerals.convertToInteger("VV");
+	}
+	
+	@Test(expected=NumberFormatException.class)
+	public void testConvertIntegerContains_LL_Throw_NumberFormatException() {
+		mNumerals.convertToInteger("LL");
+	}
+
+	@Test(expected=NumberFormatException.class)
+	public void testConvertIntegerContains_DD_Throw_NumberFormatException() {
+		mNumerals.convertToInteger("DD");
+	}
+	
+	@Test(expected=NumberFormatException.class)
+	public void testConvertIntegerContains_MMMM_Throw_NumberFormatException() {
+		mNumerals.convertToInteger("MMMM");
+	}
+	
+	@Test
+	public void testConvertIntegerContains_MMM_NoThrow_NumberFormatException() {
+		mNumerals.convertToInteger("MMM");
+	}
+
+	@Test(expected=NumberFormatException.class)
+	public void testConvertIntegerContains_CCCC_Throw_NumberFormatException() {
+		mNumerals.convertToInteger("CCCC");
+	}
+	
+	@Test
+	public void testConvertIntegerContains_CCC_NoThrow_NumberFormatException() {
+		mNumerals.convertToInteger("CCC");
+	}
+	
+	@Test(expected=NumberFormatException.class)
+	public void testConvertIntegerContains_IIII_Throw_NumberFormatException() {
+		mNumerals.convertToInteger("IIII");
+	}
+	
+	@Test
+	public void testConvertIntegerContains_III_NoThrow_NumberFormatException() {
+		mNumerals.convertToInteger("III");
+	}
+	
+	@Test(expected=NumberFormatException.class)
+	public void testConvertIntegerContains_XXXX_Throw_NumberFormatException() {
+		mNumerals.convertToInteger("XXXX");
+	}
+	
+	@Test
+	public void testConvertIntegerContains_XXX_NoThrow_NumberFormatException() {
+		mNumerals.convertToInteger("XXX");
+	}
+
+	@Test
+	public void testConvertToInteger_I_1() {
+		int integer = mNumerals.convertToInteger("I");
+		assertEquals(1, integer);
+	}
+
+	@Test
+	public void testConvertToInteger_V_5() {
+		int integer = mNumerals.convertToInteger("V");
+		assertEquals(5, integer);
+	}
+	@Test
+	public void testConvertToInteger_X_10() {
+		int integer = mNumerals.convertToInteger("X");
+		assertEquals(10, integer);
+	}
+	
+	@Test
+	public void testConvertToInteger_L_50() {
+		int integer = mNumerals.convertToInteger("L");
+		assertEquals(50, integer);
+	}
+	
+	@Test
+	public void testConvertToInteger_C_100() {
+		int integer = mNumerals.convertToInteger("C");
+		assertEquals(100, integer);
+	}
+
+	@Test
+	public void testConvertToInteger_D_500() {
+		int integer = mNumerals.convertToInteger("D");
+		assertEquals(500, integer);
+	}
+
+	@Test
+	public void testConvertToInteger_M_1000() {
+		int integer = mNumerals.convertToInteger("M");
+		assertEquals(1000, integer);
+	}
+	
+	@Test
+	public void testConvertToInteger_II_2() {
+		int integer = mNumerals.convertToInteger("II");
+		assertEquals(2, integer);
+	}
+
+	@Test
+	public void testConvertToInteger_III_3() {
+		int integer = mNumerals.convertToInteger("III");
+		assertEquals(3, integer);
+	}
+	
+	@Test
+	public void testConvertToInteger_IV_4() {
+		int integer = mNumerals.convertToInteger("IV");
+		assertEquals(4, integer);
+	}
+
+	@Test
+	public void testConvertToInteger_VI_6() {
+		int integer = mNumerals.convertToInteger("VI");
+		assertEquals(6, integer);
+	}
+	
+	@Test
+	public void testConvertToInteger_VII_7() {
+		int integer = mNumerals.convertToInteger("VII");
+		assertEquals(7, integer);
+	}
+
+	@Test
+	public void testConvertToInteger_VIII_8() {
+		int integer = mNumerals.convertToInteger("VIII");
+		assertEquals(8, integer);
+	}
+
+	@Test
+	public void testConvertToInteger_IX_9() {
+		int integer = mNumerals.convertToInteger("IX");
+		assertEquals(9, integer);
+	}
+	
+	@Test
+	public void testConvertToInteger_XX_20() {
+		int integer = mNumerals.convertToInteger("XX");
+		assertEquals(20, integer);
+	}
 
 	@Test
-	public void test() {
-		fail("Not yet implemented");
+	public void testConvertToInteger_XXX_30() {
+		int integer = mNumerals.convertToInteger("XXX");
+		assertEquals(30, integer);
 	}
 
+	@Test
+	public void testConvertToInteger_XL_40() {
+		int integer = mNumerals.convertToInteger("XL");
+		assertEquals(40, integer);
+	}
+
+	@Test
+	public void testConvertToInteger_LX_60() {
+		int integer = mNumerals.convertToInteger("LX");
+		assertEquals(60, integer);
+	}
+
+	@Test
+	public void testConvertToInteger_LXX_70() {
+		int integer = mNumerals.convertToInteger("LXX");
+		assertEquals(70, integer);
+	}
+	
+	@Test
+	public void testConvertToInteger_LXXX_80() {
+		int integer = mNumerals.convertToInteger("LXXX");
+		assertEquals(80, integer);
+	}
+	
+	@Test
+	public void testConvertToInteger_XC_90() {
+		int integer = mNumerals.convertToInteger("XC");
+		assertEquals(90, integer);
+	}
+
+	@Test
+	public void testConvertToInteger_CC_200() {
+		int integer = mNumerals.convertToInteger("CC");
+		assertEquals(200, integer);
+	}
+	
+	@Test
+	public void testConvertToInteger_CCC_300() {
+		int integer = mNumerals.convertToInteger("CCC");
+		assertEquals(300, integer);
+	}
+	
+	@Test
+	public void testConvertToInteger_CD_400() {
+		int integer = mNumerals.convertToInteger("CD");
+		assertEquals(400, integer);
+	}
+
+	@Test
+	public void testConvertToInteger_DC_600() {
+		int integer = mNumerals.convertToInteger("DC");
+		assertEquals(600, integer);
+	}
+	
+	@Test
+	public void testConvertToInteger_DCC_700() {
+		int integer = mNumerals.convertToInteger("DCC");
+		assertEquals(700, integer);
+	}
+
+	@Test
+	public void testConvertToInteger_DCCC_800() {
+		int integer = mNumerals.convertToInteger("DCCC");
+		assertEquals(800, integer);
+	}
+
+	@Test
+	public void testConvertToInteger_CM_900() {
+		int integer = mNumerals.convertToInteger("CM");
+		assertEquals(900, integer);
+	}
+	
+	@Test
+	public void testConvertToInteger_MCMLXXXIV_1984() {
+		int integer = mNumerals.convertToInteger("MCMLXXXIV");
+		assertEquals(1984, integer);
+	}
+	
+	@Test
+	public void testConvertToInteger_MMXIV_2014() {
+		int integer = mNumerals.convertToInteger("MMXIV");
+		assertEquals(2014, integer);
+	}
 }