Add test to

parse_orientation()
parse_instruction()

src/main.rs

@@ -41,3 +41,25 @@ fn open_file(filename: &str) -> io::Result<String> {
 fn main() {
     let conf = open_file("two_robots.txt");
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_parse_orientation() {
+        assert!(parse_orientation('N').is_ok());
+        assert!(parse_orientation('E').is_ok());
+        assert!(parse_orientation('S').is_ok());
+        assert!(parse_orientation('W').is_ok());
+        assert!(parse_orientation('Z').is_err());
+    }
+
+    #[test]
+    fn test_parse_instruction() {
+        assert!(parse_instruction('L').is_ok());
+        assert!(parse_instruction('R').is_ok());
+        assert!(parse_instruction('F').is_ok());
+        assert!(parse_instruction('Z').is_err());
+    }
+}