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/*
 * Copyright (c) 2010 Remko Tronçon
 * Licensed under the GNU General Public License v3.
 * See Documentation/Licenses/GPLv3.txt for more information.
 */
#include <QA/Checker/IO.h>

#include <cppunit/extensions/HelperMacros.h>
#include <cppunit/extensions/TestFactoryRegistry.h>

#include <boost/optional.hpp>
#include <boost/bind.hpp>
#include <boost/smart_ptr/make_shared.hpp>
#include <boost/shared_ptr.hpp>

#include <Swiften/Base/Algorithm.h>
#include <Swiften/Network/Connection.h>
#include <Swiften/Network/ConnectionFactory.h>
#include <Swiften/Network/HTTPConnectProxiedConnection.h>
#include <Swiften/Network/HostAddressPort.h>
#include <Swiften/Network/StaticDomainNameResolver.h>
#include <Swiften/Network/DummyTimerFactory.h>
#include <Swiften/EventLoop/DummyEventLoop.h>

using namespace Swift;

class HTTPConnectProxiedConnectionTest : public CppUnit::TestFixture {
		CPPUNIT_TEST_SUITE(HTTPConnectProxiedConnectionTest);
		CPPUNIT_TEST(testConnect_CreatesConnectionToProxy);
		CPPUNIT_TEST(testConnect_SendsConnectRequest);
		CPPUNIT_TEST(testConnect_ReceiveConnectResponse);
		CPPUNIT_TEST(testConnect_ReceiveMalformedConnectResponse);
		CPPUNIT_TEST(testConnect_ReceiveErrorConnectResponse);
		CPPUNIT_TEST(testConnect_ReceiveDataAfterConnect);
		CPPUNIT_TEST(testWrite_AfterConnect);
		CPPUNIT_TEST(testDisconnect_AfterConnectRequest);
		CPPUNIT_TEST(testDisconnect_AfterConnect);
		CPPUNIT_TEST_SUITE_END();

	public:
		void setUp() {
			proxyHost = "doo.bah";
			proxyPort = 1234;
			proxyHostAddress = HostAddressPort(HostAddress("1.1.1.1"), proxyPort);
			host = HostAddressPort(HostAddress("2.2.2.2"), 2345);
			eventLoop = new DummyEventLoop();
			resolver = new StaticDomainNameResolver(eventLoop);
			resolver->addAddress(proxyHost, proxyHostAddress.getAddress());
			timerFactory = new DummyTimerFactory();
			connectionFactory = new MockConnectionFactory(eventLoop);
			connectFinished = false;
			disconnected = false;
		}

		void tearDown() {
			delete timerFactory;
			delete connectionFactory;
			delete resolver;
			delete eventLoop;
		}

		void connect(HTTPConnectProxiedConnection::ref connection, const HostAddressPort& to) {
			connection->connect(to);
			eventLoop->processEvents();
			eventLoop->processEvents();
			eventLoop->processEvents();
		}

		void testConnect_CreatesConnectionToProxy() {
			HTTPConnectProxiedConnection::ref testling(createTestling());

			connect(testling, host);

			CPPUNIT_ASSERT_EQUAL(1, static_cast<int>(connectionFactory->connections.size()));
			CPPUNIT_ASSERT(connectionFactory->connections[0]->hostAddressPort);
			CPPUNIT_ASSERT(proxyHostAddress == *connectionFactory->connections[0]->hostAddressPort);
			CPPUNIT_ASSERT(!connectFinished);
		}

		void testConnect_SendsConnectRequest() {
			HTTPConnectProxiedConnection::ref testling(createTestling());

			connect(testling, HostAddressPort(HostAddress("2.2.2.2"), 2345));

			CPPUNIT_ASSERT_EQUAL(createByteArray("CONNECT 2.2.2.2:2345 HTTP/1.1\r\n\r\n"), connectionFactory->connections[0]->dataWritten);
		}

		void testConnect_ReceiveConnectResponse() {
			HTTPConnectProxiedConnection::ref testling(createTestling());
			connect(testling, HostAddressPort(HostAddress("2.2.2.2"), 2345));

			connectionFactory->connections[0]->onDataRead(createSafeByteArrayRef("HTTP/1.0 200 Connection established\r\n\r\n"));
			eventLoop->processEvents();

			CPPUNIT_ASSERT(connectFinished);
			CPPUNIT_ASSERT(!connectFinishedWithError);
			CPPUNIT_ASSERT(dataRead.empty());
		}

		void testConnect_ReceiveMalformedConnectResponse() {
			HTTPConnectProxiedConnection::ref testling(createTestling());
			connect(testling, HostAddressPort(HostAddress("2.2.2.2"), 2345));

			connectionFactory->connections[0]->onDataRead(createSafeByteArrayRef("FLOOP"));
			eventLoop->processEvents();

			CPPUNIT_ASSERT(connectFinished);
			CPPUNIT_ASSERT(connectFinishedWithError);
			CPPUNIT_ASSERT(connectionFactory->connections[0]->disconnected);
		}

		void testConnect_ReceiveErrorConnectResponse() {
			HTTPConnectProxiedConnection::ref testling(createTestling());
			connect(testling, HostAddressPort(HostAddress("2.2.2.2"), 2345));

			connectionFactory->connections[0]->onDataRead(createSafeByteArrayRef("HTTP/1.0 401 Unauthorized\r\n\r\n"));
			eventLoop->processEvents();

			CPPUNIT_ASSERT(connectFinished);
			CPPUNIT_ASSERT(connectFinishedWithError);
			CPPUNIT_ASSERT(connectionFactory->connections[0]->disconnected);
		}

		void testConnect_ReceiveDataAfterConnect() {
			HTTPConnectProxiedConnection::ref testling(createTestling());
			connect(testling, HostAddressPort(HostAddress("2.2.2.2"), 2345));
			connectionFactory->connections[0]->onDataRead(createSafeByteArrayRef("HTTP/1.0 200 Connection established\r\n\r\n"));
			eventLoop->processEvents();

			connectionFactory->connections[0]->onDataRead(createSafeByteArrayRef("abcdef"));

			CPPUNIT_ASSERT_EQUAL(createByteArray("abcdef"), dataRead);
		}

		void testWrite_AfterConnect() {
			HTTPConnectProxiedConnection::ref testling(createTestling());
			connect(testling, HostAddressPort(HostAddress("2.2.2.2"), 2345));
			connectionFactory->connections[0]->onDataRead(createSafeByteArrayRef("HTTP/1.0 200 Connection established\r\n\r\n"));
			eventLoop->processEvents();
			connectionFactory->connections[0]->dataWritten.clear();

			testling->write(createSafeByteArray("abcdef"));

			CPPUNIT_ASSERT_EQUAL(createByteArray("abcdef"), connectionFactory->connections[0]->dataWritten);
		}

		void testDisconnect_AfterConnectRequest() {
			HTTPConnectProxiedConnection::ref testling(createTestling());
			connect(testling, HostAddressPort(HostAddress("2.2.2.2"), 2345));

			testling->disconnect();

			CPPUNIT_ASSERT(connectionFactory->connections[0]->disconnected);
			CPPUNIT_ASSERT(disconnected);
			CPPUNIT_ASSERT(!disconnectedError);
		}

		void testDisconnect_AfterConnect() {
			HTTPConnectProxiedConnection::ref testling(createTestling());
			connect(testling, HostAddressPort(HostAddress("2.2.2.2"), 2345));
			connectionFactory->connections[0]->onDataRead(createSafeByteArrayRef("HTTP/1.0 200 Connection established\r\n\r\n"));
			eventLoop->processEvents();

			testling->disconnect();

			CPPUNIT_ASSERT(connectionFactory->connections[0]->disconnected);
			CPPUNIT_ASSERT(disconnected);
			CPPUNIT_ASSERT(!disconnectedError);
		}

	private:
		HTTPConnectProxiedConnection::ref createTestling() {
			boost::shared_ptr<HTTPConnectProxiedConnection> c = HTTPConnectProxiedConnection::create(resolver, connectionFactory, timerFactory, eventLoop, proxyHost, proxyPort, "", "");
			c->onConnectFinished.connect(boost::bind(&HTTPConnectProxiedConnectionTest::handleConnectFinished, this, _1));
			c->onDisconnected.connect(boost::bind(&HTTPConnectProxiedConnectionTest::handleDisconnected, this, _1));
			c->onDataRead.connect(boost::bind(&HTTPConnectProxiedConnectionTest::handleDataRead, this, _1));
			return c;
		}

		void handleConnectFinished(bool error) {
			connectFinished = true;
			connectFinishedWithError = error;
		}

		void handleDisconnected(const boost::optional<Connection::Error>& e) {
			disconnected = true;
			disconnectedError = e;
		}

		void handleDataRead(boost::shared_ptr<SafeByteArray> d) {
			append(dataRead, *d);
		}

		struct MockConnection : public Connection {
			public:
				MockConnection(const std::vector<HostAddressPort>& failingPorts, EventLoop* eventLoop) : eventLoop(eventLoop), failingPorts(failingPorts), disconnected(false) {
				}

				void listen() { assert(false); }

				void connect(const HostAddressPort& address) {
					hostAddressPort = address;
					bool fail = std::find(failingPorts.begin(), failingPorts.end(), address) != failingPorts.end();
					eventLoop->postEvent(boost::bind(boost::ref(onConnectFinished), fail));
				}

				HostAddressPort getLocalAddress() const { return HostAddressPort(); }

				void disconnect() { 
					disconnected = true;
					onDisconnected(boost::optional<Connection::Error>());
				}
				
				void write(const SafeByteArray& d) {
					append(dataWritten, d);
				}

				EventLoop* eventLoop;
				boost::optional<HostAddressPort> hostAddressPort;
				std::vector<HostAddressPort> failingPorts;
				ByteArray dataWritten;
				bool disconnected;
		};

		struct MockConnectionFactory : public ConnectionFactory {
			MockConnectionFactory(EventLoop* eventLoop) : eventLoop(eventLoop) {
			}

			boost::shared_ptr<Connection> createConnection() {
				boost::shared_ptr<MockConnection> connection = boost::make_shared<MockConnection>(failingPorts, eventLoop);
				connections.push_back(connection);
				return connection;
			}

			EventLoop* eventLoop;
			std::vector< boost::shared_ptr<MockConnection> > connections;
			std::vector<HostAddressPort> failingPorts;
		};

	private:
		std::string proxyHost;
		HostAddressPort proxyHostAddress;
		int proxyPort;
		HostAddressPort host;
		DummyEventLoop* eventLoop;
		StaticDomainNameResolver* resolver;
		MockConnectionFactory* connectionFactory;
		TimerFactory* timerFactory;
		std::vector< boost::shared_ptr<MockConnection> > connections;
		bool connectFinished;
		bool connectFinishedWithError;
		bool disconnected;
		boost::optional<Connection::Error> disconnectedError;
		ByteArray dataRead;
};

CPPUNIT_TEST_SUITE_REGISTRATION(HTTPConnectProxiedConnectionTest);