Add test for creating symlink nodes and fix code to pass test

src/node.rs

@@ -132,7 +132,7 @@ impl Node {
     ) -> Result<Self, Error> {
         let name = String::from(path);
         let fd = fs::File::open(path)?;
-        let meta = fd.metadata()?;
+        let meta = fs::symlink_metadata(path)?;
         let mode = meta.mode();
         let uid = meta.uid();
         let gid = meta.gid();
@@ -310,12 +310,12 @@ impl Node {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use std::fmt::Write;
+    use std::{fmt::Write, fs::remove_file};
 
     static LI: &[u8] = include_bytes!("../test/li.txt");
 
     #[test]
-    fn from_path() {
+    fn from_file_path() {
         let links = Mutex::new(HashMap::new());
         let node = Node::from_path("test/li.txt", Algorithm::Sha256, &links).unwrap();
         let FileType::Normal(f) = node.filetype else {
@@ -336,7 +336,20 @@ mod tests {
     }
 
     #[test]
-    fn load_store() {
+    fn from_symlink_path() {
+        let _res = remove_file("test/lilnk.txt");
+        symlink("li.txt", "test/lilnk.txt").unwrap();
+        let links = Mutex::new(HashMap::new());
+        let node = Node::from_path("test/lilnk.txt", Algorithm::Skip, &links).unwrap();
+        let FileType::SoftLink(tgt) = node.filetype else {
+            eprintln!("Incorrect filetype: {:?}", node.filetype);
+            panic!();
+        };
+        assert_eq!(tgt, "li.txt");
+    }
+
+    #[test]
+    fn load_store_file() {
         {
             let fd = std::fs::File::create("test/li.node").unwrap();
             let mut writer = std::io::BufWriter::new(fd);