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#define BOOST_TEST_MODULE TestNetFSCore
#include <boost/test/unit_test.hpp>
#include <boost/filesystem/operations.hpp>
#include <boost/lexical_cast.hpp>
#include <boost/scope_exit.hpp>
#include <Ice/ObjectAdapter.h>
#include <Ice/Service.h>
#include "mockDaemon.h"
#include <fuseApp.h>
#include <boost/filesystem/path.hpp>

#ifndef ROOT
#error "ROOT needs to be defined at compilation time"
#endif

#define XSTR(s) STR(s)
#define STR(s) #s
const boost::filesystem::path RootDir(XSTR(ROOT));
const std::string testEndpoint("tcp -h localhost -p 12012");

char * argv[] = {
	strdup((RootDir / ":testvol").string().c_str()),
	strdup((RootDir / "test").string().c_str())
};

class FuseMock : public NetFS::FuseApp {
	public:
		FuseMock(int & argc, char ** argv) :
			NetFS::FuseApp(argc, argv)
		{
			::memset(&context, 0, sizeof(fuse_context));
			context.pid = getpid();
			context.uid = getuid();
			context.gid = getgid();
		}

		struct fuse_context * fuse_get_context() override
		{
			return &context;
		}

		int fuse_opt_parse(struct fuse_args * args, void * data, const struct fuse_opt [], fuse_opt_proc_t proc) override
		{
			for (int n = 0; n < args->argc; n += 1) {
				proc(data, args->argv[n], n, args);
			}
			return 0;
		}

		int main(int &, char **, const struct fuse_operations * o) override
		{
			o->init(NULL);
			ops = *o;
			return 0;
		}

		fuse_operations ops;

	protected:
		virtual NetFS::Client::ConfigurationPtr ReadConfiguration(const std::string &) const override
		{
			return new NetFS::Client::Configuration(
				{
					{ "testvol", new NetFS::Client::Resource("testvol", "Service", { testEndpoint }) }
				});
		}

	private:
		fuse_context context;
};

class FuseMockHost {
	public:
		FuseMockHost() :
			argc(2),
			app(new FuseMock(argc, argv)),
			fuse(&app->ops)
		{
			char ** a = argv;
			FuseAppBase::run(argc, a, app);
		}

		FuseMockHost(int c, char ** v) :
			argc(c),
			app(new FuseMock(c, v)),
			fuse(&app->ops)
		{
			FuseAppBase::run(argc, v, app);
		}

		~FuseMockHost()
		{
			delete app;
		}

		int argc;
		FuseMock * app;
		fuse_operations * fuse;
};

class Core {
	public:
		Core() :
			daemonHost(testEndpoint),
			ic(daemonHost.ic),
			fuse(fuseHost.fuse)
		{
		}

	protected:
		MockDaemonHost daemonHost;
		FuseMockHost fuseHost;

		Ice::CommunicatorPtr ic;
		fuse_operations * fuse;;
};

BOOST_FIXTURE_TEST_SUITE( NetfsCore, Core )

BOOST_AUTO_TEST_CASE ( daemonInitialised )
{
	auto service = NetFS::ServicePrx::checkedCast(ic->stringToProxy("Service"));
	BOOST_REQUIRE(service);
	service->ice_ping();
}

BOOST_AUTO_TEST_CASE ( clientInitialised )
{
	struct statvfs s;
	BOOST_REQUIRE_EQUAL(0, fuse->statfs("/",  &s));
}

BOOST_AUTO_TEST_SUITE_END();

BOOST_AUTO_TEST_CASE ( createAndDaemonRestart )
{
	MockDaemonHost daemon(testEndpoint);
	FuseMockHost fuse;

	struct statvfs s;
	BOOST_REQUIRE_EQUAL(0, fuse.fuse->statfs("/",  &s));

	const char * fileName = "/createMe";
	BOOST_CHECKPOINT("Create a new file");
	struct fuse_file_info fh;
	memset(&fh, 0, sizeof(fh));
	fh.flags = O_WRONLY | O_CREAT | O_APPEND;
	BOOST_REQUIRE_EQUAL(0, fuse.fuse->create(fileName, 0100644, &fh));
	BOOST_REQUIRE(fh.fh);

	BOOST_CHECKPOINT("Fetch file attributes");
	struct stat st;
	BOOST_REQUIRE_EQUAL(0, fuse.fuse->fgetattr(fileName, &st, &fh));
	BOOST_REQUIRE_EQUAL(st.st_size, 0);
	BOOST_REQUIRE_EQUAL(st.st_uid, getuid());
	BOOST_REQUIRE_EQUAL(st.st_gid, getgid());

	BOOST_CHECKPOINT("Write some data");
	char someData[890];
	BOOST_REQUIRE_EQUAL(sizeof(someData), fuse.fuse->write(fileName, someData, sizeof(someData), 0, &fh));

	BOOST_REQUIRE_EQUAL(0, fuse.fuse->fgetattr(fileName, &st, &fh));
	BOOST_REQUIRE_EQUAL(st.st_size, sizeof(someData));

	BOOST_CHECKPOINT("Restart daemon object");
	daemon.restart();

	BOOST_CHECKPOINT("Fetch file attributes again");
	BOOST_REQUIRE_EQUAL(0, fuse.fuse->fgetattr(fileName, &st, &fh));

	BOOST_CHECKPOINT("Close file");
	BOOST_REQUIRE_EQUAL(0, fuse.fuse->release(fileName, &fh));
}

BOOST_AUTO_TEST_CASE ( withRouter )
{
	BOOST_REQUIRE_EQUAL(0,
		system("/usr/bin/glacier2router --Glacier2.Client.Endpoints='tcp -p 4063' --Glacier2.PermissionsVerifier=Glacier2/NullPermissionsVerifier --daemon --pidfile /tmp/glacier.pid"));
	sleep(1);

	BOOST_SCOPE_EXIT(void) {
		system("kill $(cat /tmp/glacier.pid)");
	} BOOST_SCOPE_EXIT_END;

	{
		char * argv[] = {
			strdup((RootDir / ":testvol").string().c_str()),
			strdup((RootDir / "test").string().c_str()),
			strdup("--Ice.Default.Router=Glacier2/router:tcp -h localhost -p 4063")
		};

		MockDaemonHost daemon(testEndpoint);
		FuseMockHost fuse(3, argv);

		struct statvfs s;
		BOOST_REQUIRE_EQUAL(0, fuse.fuse->statfs("/",  &s));
	}
}