Removed the struct

src/test.rs

@@ -0,0 +1,25 @@
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn digits() {
+        use crate::digit_to_text;
+        assert_eq!(digit_to_text(9).unwrap(), "nine");
+    }
+    #[test]
+    fn numbers() {
+        use crate::to_text;
+        assert_eq!(to_text(12345), "twelvethousandthreehundredfortyfive");
+        assert_eq!(to_text(81123), "eightyonethousandonehundredtwentythree");
+        assert_eq!(to_text(12), "twelve");
+    }
+    #[test]
+    fn tens() {
+        use crate::tens_place;
+        assert_eq!(tens_place(1, 2).unwrap(), "twelve");
+        assert_eq!(tens_place(7, 6).unwrap(), "seventysix");
+        assert_eq!(tens_place(5, 7).unwrap(), "fiftyseven");
+        assert_eq!(tens_place(2, 3).unwrap(), "twentythree");
+        assert_eq!(tens_place(6, 9).unwrap(), "sixtynine");
+        assert_eq!(tens_place(0, 9).unwrap(), "nine");
+    }
+}