Adding a small test for normal_path.rs (#288)

- Adding a small test for normal_path.rs

src/normal_path.rs

@@ -183,3 +183,22 @@ impl ValueParserFactory for NormalPath {
         Self::Parser::default()
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use std::env;
+
+    use super::*;
+
+    #[test]
+    fn test_into_absolute() {
+        let dir = env::temp_dir();
+        let path_buf = Utf8PathBuf::from_path_buf(dir.clone()).unwrap();
+        let test_path = NormalPath {
+            normal: path_buf,
+            relative: None,
+        };
+
+        assert_eq!(test_path.into_absolute().as_os_str(), dir.as_os_str());
+    }
+}