add voting_account test

libraries/protocol/include/graphene/protocol/account.hpp

@@ -321,7 +321,7 @@ namespace graphene { namespace protocol {
 } } // graphene::protocol
 
 FC_REFLECT( graphene::protocol::additional_account_options,
-        (committee_voting_account)(witness_voting_account)(worker_voting_account))
+            (committee_voting_account)(witness_voting_account)(worker_voting_account))
 FC_REFLECT(graphene::protocol::account_options, (memo_key)(voting_account)(num_witness)(num_committee)(votes)(extensions))
 FC_REFLECT_ENUM( graphene::protocol::account_whitelist_operation::account_listing,
                 (no_listing)(white_listed)(black_listed)(white_and_black_listed))

tests/tests/voting_tests.cpp

@@ -587,7 +587,7 @@ BOOST_AUTO_TEST_CASE(simple_account_update_votes_operation)
       generate_block();
       set_expiration( db, trx );
 
-      ACTORS((alice));
+      ACTORS((alice)(bob));
       fund(alice);
 
       auto alice_object = get_account("alice");
@@ -673,6 +673,21 @@ BOOST_AUTO_TEST_CASE(simple_account_update_votes_operation)
 
       BOOST_CHECK_EQUAL(alice_object.options.voting_account.instance.value, 5);
 
+      // change voting account
+      {
+         graphene::chain::account_update_votes_operation op;
+         op.account = alice_id;
+         op.voting_account = bob_id;
+         trx.operations.push_back(op);
+         sign(trx, alice_private_key);
+         PUSH_TX(db, trx, ~0);
+         trx.clear();
+      }
+      generate_block();
+
+      alice_object = get_account("alice");
+
+      BOOST_CHECK_EQUAL(alice_object.options.voting_account.instance.value, bob_id.instance.value);
    } FC_LOG_AND_RETHROW()
 }