Test ErrorKind::AlreadyExists for files

diff --git a/src/libstd/fs.rs b/src/libstd/fs.rs
index 0180c3118a586f41c813e65b5ddfa207e3b945f6..cb8105d7dc1d7d2c532dc5183d0c5d82b3f846fa 100644 (file)
--- a/src/libstd/fs.rs
+++ b/src/libstd/fs.rs
@@ -1770,6 +1770,15 @@ fn file_test_directoryinfo_readdir() {
         check!(fs::remove_dir(dir));
     }
 
+    #[test]
+    fn file_create_new_already_exists_error() {
+        let tmpdir = tmpdir();
+        let file = &tmpdir.join("file_create_new_error_exists");
+        check!(fs::File::create(file));
+        let e = fs::OpenOptions::new().write(true).create_new(true).open(file).unwrap_err();
+        assert_eq!(e.kind(), ErrorKind::AlreadyExists);
+    }
+
     #[test]
     fn mkdir_path_already_exists_error() {
         let tmpdir = tmpdir();