Add test

src/disc.rs

@@ -109,3 +109,35 @@ impl DecoderState {
         return char;
     }
 }
+
+#[cfg(test)]
+mod test {
+    use crate::disc::DecoderState;
+
+    #[test]
+    pub fn test_encode() {
+        let inner_disc = ['a', 't', 'o', 'v', 'w', 'r', '7', '4', 'h', 'f', 'k', 'n', '9', 'b', '2', 'x', 'i', 'd', 'u', '1', 'e', '6', 'g', 's', 'l', 'p', 'j', '8', 'z', '3', 'm', '5', 'q', 'c', '0', 'y'];
+        let outer_disc = ['9', 'z', '2', '7', 'h', 'w', '6', 'u', 'b', 'o', '4', 'm', '0', '3', 'j', 't', 'd', 'r', 'n', 'g', '1', 'i', '8', 'k', 'l', 'x', 'y', 'p', 's', 'v', 'e', 'a', 'c', 'q', '5', 'f'];
+
+        let mut decoder = DecoderState::new(inner_disc.to_vec(), outer_disc.to_vec());
+
+        decoder.set_index(2);
+
+        let input_msg = "hello1";
+        let expected_output_msg = "4ksvby";
+
+        let mut output_msg = Vec::new();
+
+        for l in input_msg.chars() {
+            let new_l = decoder.encode(l);
+
+            output_msg.push(new_l);
+
+            decoder.change_index(1);
+        }
+
+        let output_msg: String = output_msg.iter().collect();
+
+        assert_eq!(output_msg, expected_output_msg);
+    }
+}