1 files changed, 15 insertions, 0 deletions
diff --git a/std/wasi/testdata/std_fs_file_sync_all.rs b/std/wasi/testdata/std_fs_file_sync_all.rs
new file mode 100644
index 000000000..bb7bb34c7
--- /dev/null
+++ b/std/wasi/testdata/std_fs_file_sync_all.rs
@@ -0,0 +1,15 @@
+// { "preopens": { "/scratch": "scratch" } }
+
+fn main() {
+  let file = std::fs::File::create("/scratch/file").unwrap();
+
+  assert!(file.set_len(5).is_ok());
+  assert!(file.sync_all().is_ok());
+  let metadata = std::fs::metadata("/scratch/file").unwrap();
+  assert_eq!(metadata.len(), 5);
+
+  assert!(file.set_len(25).is_ok());
+  assert!(file.sync_all().is_ok());
+  let metadata = std::fs::metadata("/scratch/file").unwrap();
+  assert_eq!(metadata.len(), 25);
+}