Convert One

tcr-roman-numerals/src/main/java/fr/ippon/kata/numeral/Numerals.java

@@ -3,6 +3,10 @@ package fr.ippon.kata.numeral;
 public class Numerals {
 
   public static String toRoman(int arabic) {
-    return "";
+    if (arabic == 0) {
+      return "";
+    }
+
+    return "I";
   }
 }

tcr-roman-numerals/src/test/java/fr/ippon/kata/numeral/NumeralsTest.java

 package fr.ippon.kata.numeral;
 
 import static org.assertj.core.api.Assertions.*;
-import static org.junit.jupiter.api.Assertions.*;
 
 import org.junit.jupiter.api.Test;
 
@@ -11,4 +10,9 @@ class NumeralsTest {
   void shouldConvertZeroToEmptyString() {
     assertThat(Numerals.toRoman(0)).isEmpty();
   }
+
+  @Test
+  void shouldConvertOneToI() {
+    assertThat(Numerals.toRoman(1)).isEqualTo("I");
+  }
 }