Updated to add a simple forking test

TestHelper.cpp

@@ -0,0 +1,40 @@
+/*
+	This file is part of cpp-ethereum.
+
+	cpp-ethereum is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	cpp-ethereum is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/** @file TestHelper.cpp
+ * @author Marko Simovic <markobarko@gmail.com>
+ * @date 2014
+ */
+
+#include <thread>
+#include <chrono>
+#include <Client.h>
+#include "TestHelper.h"
+
+namespace eth
+{
+
+void mine(Client& c, int numBlocks)
+{
+	auto startBlock = c.blockChain().details().number;
+
+	c.startMining();
+	while(c.blockChain().details().number < startBlock + numBlocks)
+		std::this_thread::sleep_for(std::chrono::milliseconds(100));
+	c.stopMining();
+}
+
+}

TestHelper.h

@@ -0,0 +1,29 @@
+/*
+	This file is part of cpp-ethereum.
+
+	cpp-ethereum is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	cpp-ethereum is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/** @file TestHelper.h
+ * @author Marko Simovic <markobarko@gmail.com>
+ * @date 2014
+ */
+
+#pragma once
+
+namespace eth
+{
+
+void mine(Client& c, int numBlocks);
+
+}

fork.cpp

@@ -0,0 +1,56 @@
+/*
+	This file is part of cpp-ethereum.
+
+	cpp-ethereum is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	cpp-ethereum is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/** @file fork.cpp
+ * @author Marko Simovic <markobarko@gmail.com>
+ * @date 2014
+ * Tests for different forking behavior
+ */
+
+#include <boost/test/unit_test.hpp>
+#include <boost/filesystem/operations.hpp>
+#include <Client.h>
+#include <BlockChain.h>
+#include <PeerServer.h>
+#include "TestHelper.h"
+using namespace std;
+using namespace eth;
+
+BOOST_AUTO_TEST_CASE(simple_chain_fork)
+{
+	//start a client and mine a short chain
+	Client c1("TestClient1", KeyPair::create().address(),
+			(boost::filesystem::temp_directory_path() / boost::filesystem::unique_path()).string());
+	mine(c1, 4);
+
+	//start another client and mine a longer chain
+	Client c2("TestClient2", KeyPair::create().address(),
+			(boost::filesystem::temp_directory_path() / boost::filesystem::unique_path()).string());
+	mine(c2, 6);
+
+	//connect the two clients up to resolve chain
+	c1.startNetwork(20000);
+	c2.startNetwork(21000);
+	c2.connect("127.0.0.1", 20000);
+
+	//mine an extra block to cement it
+	mine(c1, 1);
+
+	//check the balances are where they should be
+	//c1's chain should have been clobbered by c2
+	BOOST_REQUIRE(c1.state().balance(c1.address()) == 0);
+	BOOST_REQUIRE(c2.state().balance(c2.address()) > 0);
+}

txTest.cpp

@@ -25,19 +25,10 @@
 #include <Client.h>
 #include <BlockChain.h>
 #include <PeerServer.h>
+#include "TestHelper.h"
 using namespace std;
 using namespace eth;
 
-void mine(Client &c, int numBlocks)
-{
-	auto startBlock = c.blockChain().details().number;
-
-	c.startMining();
-	while(c.blockChain().details().number < startBlock + numBlocks)
-		this_thread::sleep_for(chrono::milliseconds(1000));
-	c.stopMining();
-}
-
 BOOST_AUTO_TEST_CASE(mine_and_send_to_peer)
 {
 	KeyPair kp1 = KeyPair::create();