roman: get start with the roman numerals

roman/roman.go

@@ -0,0 +1,11 @@
+package roman
+
+func ConvertToRoman(arabic int) string {
+	var converted string
+	if arabic <= 3 {
+		for i := 0; i < arabic; i++ {
+			converted += "I"
+		}
+	}
+	return converted
+}

roman/roman_test.go

@@ -0,0 +1,25 @@
+package roman
+
+import "testing"
+
+func TestRomanNemerals(t *testing.T) {
+	cases := []struct {
+		Description string
+		Arabic      int
+		Want        string
+	}{
+		{"1 gets converted to I", 1, "I"},
+		{"2 gets converted to II", 2, "II"},
+		{"3 gets converted to III", 3, "III"},
+	}
+	for _, test := range cases {
+		t.Run(test.Description, func(t *testing.T) {
+			got := ConvertToRoman(test.Arabic)
+			want := test.Want
+
+			if got != want {
+				t.Errorf("got %q, want %q", got, want)
+			}
+		})
+	}
+}