Fixed to_text not returning single digits

src/lib.rs

@@ -79,6 +79,9 @@ pub fn to_text(number: u32) -> String {
         .collect();
     let second_digit_array: [usize; 2] = [0, 3];
     let mut last: Option<u8> = None;
+    if digits.len() == 1 {
+        numtext.push_str(digit_to_text(*digits.last().unwrap()).unwrap().as_str());
+    } else {
         for (index, digit) in digits.iter().rev().enumerate() {
             if second_digit_array.contains(&index) {
                 last = Some(digit.clone());
@@ -101,5 +104,6 @@ pub fn to_text(number: u32) -> String {
                 )
             }
         }
+    }
     numtext
 }

src/test.rs

@@ -4,6 +4,9 @@ mod tests {
     fn digits() {
         use crate::digit_to_text;
         assert_eq!(digit_to_text(9).unwrap(), "nine");
+        assert_eq!(digit_to_text(3).unwrap(), "three");
+        assert_eq!(digit_to_text(7).unwrap(), "seven");
+        assert_eq!(digit_to_text(5).unwrap(), "five");
     }
     #[test]
     fn numbers() {
@@ -11,6 +14,7 @@ mod tests {
         assert_eq!(to_text(12345), "twelvethousandthreehundredfortyfive");
         assert_eq!(to_text(81123), "eightyonethousandonehundredtwentythree");
         assert_eq!(to_text(12), "twelve");
+        assert_eq!(to_text(2), "two");
     }
     #[test]
     fn tens() {