Improve write_with_callback_test to sync WAL

Summary: Currently write_with_callback_test does not test with WAL syncing enabled. This addresses that.

Test Plan: write_with_callback_test

Reviewers: anthony

Reviewed By: anthony

Subscribers: leveldb, dhruba, hermanlee4

Differential Revision: https://reviews.facebook.net/D54255

db/write_callback_test.cc

@@ -113,12 +113,12 @@ TEST_F(WriteCallbackTest, WriteWithCallbackTest) {
 
   for (auto& allow_parallel : {true, false}) {
     for (auto& allow_batching : {true, false}) {
+      for (auto& enable_WAL : {true, false}) {
         for (auto& write_group : write_scenarios) {
           Options options;
           options.create_if_missing = true;
           options.allow_concurrent_memtable_write = allow_parallel;
 
-        WriteOptions write_options;
           ReadOptions read_options;
           DB* db;
           DBImpl* db_impl;
@@ -224,6 +224,8 @@ TEST_F(WriteCallbackTest, WriteWithCallbackTest) {
             }
 
             WriteOptions woptions;
+            woptions.disableWAL = !enable_WAL;
+            woptions.sync = enable_WAL;
             Status s = db_impl->WriteWithCallback(
                 woptions, &write_op.write_batch_, &write_op.callback_);
 
@@ -269,6 +271,7 @@ TEST_F(WriteCallbackTest, WriteWithCallbackTest) {
         }
       }
     }
+  }
 }
 
 TEST_F(WriteCallbackTest, WriteCallBackTest) {