Relax hard-link test error assertions

Fixes #177.

Author: wingo

tests/rust/wasm32-wasip3/src/bin/filesystem-hard-links.rs

@@ -39,7 +39,7 @@ async fn test_hard_links(dir: &Descriptor) {
     assert_eq!(ln("a.txt", "/a.txt").await, Err(ErrorCode::NotPermitted));
     assert_eq!(ln("..", "a.txt").await, Err(ErrorCode::NotPermitted));
     assert_eq!(ln("a.txt", "..").await, Err(ErrorCode::NotPermitted));
-    // FIXME: https://github.com/WebAssembly/wasi-filesystem/issues/191
+    // FIXME: https://github.com/WebAssembly/WASI/issues/710
     // assert_eq!(ln_follow("parent/foo", "a.txt").await,
     //            Err(ErrorCode::NotPermitted));
     assert_eq!(ln("parent/foo", "a.txt").await,
@@ -51,9 +51,11 @@ async fn test_hard_links(dir: &Descriptor) {
     mkdir("d.cleanup").await.unwrap();
     ln("a.txt", "d.cleanup/q.txt").await.unwrap();
     rm("d.cleanup/q.txt").await.unwrap();
-    // https://github.com/WebAssembly/wasi-filesystem/issues/184
-    assert_eq!(ln("d.cleanup", "e.cleanup").await,
-               Err(ErrorCode::NotPermitted));
+    match ln("d.cleanup", "e.cleanup").await {
+        Err(ErrorCode::NotPermitted | ErrorCode::Access) => (),
+        Err(e) => panic!("unexpected error hard-linking directories: {}", e),
+        Ok(_) => panic!("unexpected success hard-linking directories")
+    }
     rmdir("d.cleanup").await.unwrap();
 }