tests: check case insensitive file symlink (WIP)

lib/tests/test_local_working_copy.rs

@@ -69,6 +69,21 @@ fn check_icase_fs(dir: &Path) -> bool {
     dir.join(upper_name).try_exists().unwrap()
 }
 
+fn check_icase_file_symlink(dir: &Path) -> bool {
+    let temp_dir = tempfile::Builder::new()
+        .prefix("icase-")
+        .tempdir_in(dir)
+        .unwrap();
+    let symlink_name = "symlink";
+    std::fs::write(temp_dir.path().join("file"), "").unwrap();
+    try_symlink("file", temp_dir.path().join(symlink_name)).unwrap();
+    match temp_dir.path().join(symlink_name.to_ascii_uppercase()).symlink_metadata() {
+        Ok(_) => true,
+        Err(err) if err.kind() == std::io::ErrorKind::NotFound => false,
+        Err(err) => panic!("{err}"),
+    }
+}
+
 /// Returns true if the directory appears to ignore some unicode zero-width
 /// characters, as in HFS+.
 fn check_hfs_plus(dir: &Path) -> bool {
@@ -1322,6 +1337,7 @@ fn test_check_out_existing_file_symlink_icase_fs(victim_exists: bool) {
     let repo = &test_workspace.repo;
     let workspace_root = test_workspace.workspace.workspace_root().to_owned();
     let is_icase_fs = check_icase_fs(&workspace_root);
+    dbg!(check_icase_file_symlink(&workspace_root)); // XXX
 
     // Creates a symlink in working directory, and a tree that will overwrite
     // the symlink content.