1 files changed, 33 insertions, 0 deletions
diff --git a/vendor/fd-lock/tests/test.rs b/vendor/fd-lock/tests/test.rs
new file mode 100644
index 000000000..35fd5b33b
--- /dev/null
+++ b/vendor/fd-lock/tests/test.rs
@@ -0,0 +1,33 @@
+use fd_lock::RwLock;
+use std::fs::File;
+use std::io::ErrorKind;
+
+use tempfile::tempdir;
+
+#[test]
+fn double_read_lock() {
+    let dir = tempdir().unwrap();
+    let path = dir.path().join("lockfile");
+
+    let l0 = RwLock::new(File::create(&path).unwrap());
+    let l1 = RwLock::new(File::open(path).unwrap());
+
+    let _g0 = l0.try_read().unwrap();
+    let _g1 = l1.try_read().unwrap();
+}
+
+#[test]
+fn double_write_lock() {
+    let dir = tempdir().unwrap();
+    let path = dir.path().join("lockfile");
+
+    let mut l0 = RwLock::new(File::create(&path).unwrap());
+    let mut l1 = RwLock::new(File::open(path).unwrap());
+
+    let g0 = l0.try_write().unwrap();
+
+    let err = l1.try_write().unwrap_err();
+    assert!(matches!(err.kind(), ErrorKind::WouldBlock));
+
+    drop(g0);
+}