p2p: isolate regtest from mainnet bootstrap state

(cherry picked from commit 1d2ae2138a85dd93bc8a0d2c55513c5b5ba4658f)

tests/unit_tests/node_server.cpp

@@ -147,6 +147,69 @@ static bool is_blocked(Server &server, const epee::net_utils::network_address &a
   return false;
 }
 
+namespace
+{
+  using path_t = boost::filesystem::path;
+  using ec_t = boost::system::error_code;
+
+  path_t create_temp_dir(const char* pattern)
+  {
+    ec_t ec;
+    path_t path = boost::filesystem::temp_directory_path() / boost::filesystem::unique_path(pattern, ec);
+    if (ec)
+      return path_t{};
+
+    const bool success = boost::filesystem::create_directory(path, ec);
+    if (!ec && success)
+      return path;
+
+    return path_t{};
+  }
+
+  void remove_tree(const path_t& path)
+  {
+    ec_t ec;
+    boost::filesystem::remove_all(path, ec);
+  }
+
+  boost::program_options::variables_map make_regtest_options(const path_t& dir)
+  {
+    boost::program_options::options_description desc;
+    cryptonote::core::init_options(desc);
+    Server::init_options(desc);
+
+    std::vector<std::string> args{
+      "--regtest",
+      "--p2p-bind-ip=127.0.0.1",
+      "--no-igd",
+      "--out-peers=0",
+      "--in-peers=0",
+      "--data-dir",
+      dir.string(),
+      "--check-updates=disabled",
+      "--disable-dns-checkpoints",
+      "--offline",
+    };
+
+    boost::program_options::variables_map vm;
+    boost::program_options::store(
+      boost::program_options::command_line_parser(args).options(desc).run(),
+      vm
+    );
+    boost::program_options::notify(vm);
+    return vm;
+  }
+
+  nodetool::peerlist_entry make_peer(const epee::net_utils::network_address& address, const nodetool::peerid_type id, const int64_t last_seen)
+  {
+    nodetool::peerlist_entry peer = AUTO_VAL_INIT(peer);
+    peer.adr = address;
+    peer.id = id;
+    peer.last_seen = last_seen;
+    return peer;
+  }
+}
+
 TEST(ban, add)
 {
   test_core pr_core;
@@ -1254,5 +1317,47 @@ TEST(node_server, race_condition)
   remove_tree(dir);
 }
 
+TEST(regtest, isolates_p2p_state_from_mainnet_data_dir)
+{
+  const path_t dir = create_temp_dir("regtest-%%%%%%%%%%%%%%%%");
+  ASSERT_TRUE(!dir.empty());
+  auto cleanup = epee::misc_utils::create_scope_leave_handler([&dir]{
+    remove_tree(dir);
+  });
+
+  nodetool::peerlist_types peers{};
+  peers.white.push_back(make_peer(MAKE_IPV4_ADDRESS_PORT(11, 22, 33, 44, 18080), 1, 100));
+  peers.gray.push_back(make_peer(MAKE_IPV4_ADDRESS_PORT(55, 66, 77, 88, 18080), 2, 200));
+
+  const path_t mainnet_state = dir / P2P_NET_DATA_FILENAME;
+  ASSERT_TRUE(nodetool::peerlist_storage{}.store(mainnet_state.string(), peers));
+
+  test_core pr_core;
+  cryptonote::t_cryptonote_protocol_handler<test_core> cprotocol(pr_core, NULL);
+  Server server(cprotocol);
+  cprotocol.set_p2p_endpoint(&server);
+
+  const auto vm = make_regtest_options(dir);
+  ASSERT_TRUE(server.init(vm));
+  ASSERT_EQ(0u, server.get_public_white_peers_count());
+  ASSERT_EQ(0u, server.get_public_gray_peers_count());
+  ASSERT_TRUE(server.deinit());
+
+  const path_t regtest_state = dir / "fake" / P2P_NET_DATA_FILENAME;
+  ASSERT_TRUE(boost::filesystem::exists(regtest_state));
+
+  auto base_storage = nodetool::peerlist_storage::open(mainnet_state.string());
+  ASSERT_TRUE(bool(base_storage));
+  nodetool::peerlist_types base_public = base_storage->take_zone(epee::net_utils::zone::public_);
+  EXPECT_EQ(1u, base_public.white.size());
+  EXPECT_EQ(1u, base_public.gray.size());
+
+  auto regtest_storage = nodetool::peerlist_storage::open(regtest_state.string());
+  ASSERT_TRUE(bool(regtest_storage));
+  nodetool::peerlist_types regtest_public = regtest_storage->take_zone(epee::net_utils::zone::public_);
+  EXPECT_TRUE(regtest_public.white.empty());
+  EXPECT_TRUE(regtest_public.gray.empty());
+}
+
 namespace nodetool { template class node_server<cryptonote::t_cryptonote_protocol_handler<test_core>>; }
 namespace cryptonote { template class t_cryptonote_protocol_handler<test_core>; }