Add tests

src/db.rs

@@ -1170,12 +1170,7 @@ impl DB {
     pub fn property_value_cf(&self, cf: ColumnFamily, name: &str) -> Option<String> {
         let prop_name = CString::new(name).unwrap();
         unsafe {
-            let value = ffi::rocksdb_property_value_cf(
-                self.inner,
-                cf.inner,
-                prop_name.as_ptr()
-            );
-
+            let value = ffi::rocksdb_property_value_cf(self.inner, cf.inner, prop_name.as_ptr());
             if value.is_null() {
                 return None;
             }

tests/test_property.rs

@@ -0,0 +1,47 @@
+// Copyright 2019 Tyler Neely
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+extern crate rocksdb;
+mod util;
+
+use rocksdb::{Options, DB};
+use util::DBPath;
+
+#[test]
+fn property_test() {
+    let n = DBPath::new("_rust_rocksdb_property_test");
+    {
+        let db = DB::open_default(&n).unwrap();
+        let value = db
+            .property_int_value("rocksdb.estimate-live-data-size")
+            .unwrap();
+
+        assert!(value == 0);
+    }
+}
+
+#[test]
+fn property_cf_test() {
+    let n = DBPath::new("_rust_rocksdb_property_cf_test");
+    {
+        let opts = Options::default();
+        let db = DB::open_default(&n).unwrap();
+        let cf = db.create_cf("cf1", &opts).unwrap();
+        let total_keys = db
+            .property_int_value_cf(cf, "rocksdb.estimate-num-keys")
+            .unwrap() as usize;
+
+        assert!(total_keys == 0);
+    }
+}