Fix Windows UTF-8 build flag (#623)

Co-authored-by: Oleksandr Anyshchenko <oleksandr.anyshchenko@xdev.re>

librocksdb-sys/build.rs

@@ -171,7 +171,7 @@ fn build_rocksdb() {
         config.define("_MBCS", None);
         config.define("WIN64", None);
         config.define("NOMINMAX", None);
-        config.define("WITH_WINDOWS_UTF8_FILENAMES", "ON");
+        config.define("ROCKSDB_WINDOWS_UTF8_FILENAMES", None);
 
         if &target == "x86_64-pc-windows-gnu" {
             // Tell MinGW to create localtime_r wrapper of localtime_s function.

tests/test_db.rs

@@ -618,6 +618,23 @@ fn test_open_with_multiple_refs_as_single_threaded() {
     t.compile_fail("tests/fail/open_with_multiple_refs_as_single_threaded.rs");
 }
 
+#[test]
+fn test_open_utf8_path() {
+    let path = DBPath::new("_rust_rocksdb_utf8_path_temporärer_Ordner");
+
+    {
+        let db = DB::open_default(&path).unwrap();
+
+        assert!(db.put(b"k1", b"v1111").is_ok());
+
+        let r: Result<Option<Vec<u8>>, Error> = db.get(b"k1");
+
+        assert_eq!(r.unwrap().unwrap(), b"v1111");
+        assert!(db.delete(b"k1").is_ok());
+        assert!(db.get(b"k1").unwrap().is_none());
+    }
+}
+
 #[test]
 fn compact_range_test() {
     let path = DBPath::new("_rust_rocksdb_compact_range_test");