opencog-atomspace / tests / query / BuggyNotUTest.cxxtest

/*
 * tests/query/BuggyNotUTest.cxxtest
 *
 * Copyright (C) 2009, 2013 Linas Vepstas <linasvepstas@gmail.com>
 * All Rights Reserved
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License v3 as
 * published by the Free Software Foundation and including the exceptions
 * at http://opencog.org/wiki/Licenses
 *
 * This program 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 Affero General Public License
 * along with this program; if not, write to:
 * Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include <opencog/atomspace/AtomSpace.h>
#include <opencog/guile/SchemeEval.h>
#include <opencog/util/Logger.h>
#include "test-types.h"

using namespace opencog;

class BuggyNot :  public CxxTest::TestSuite
{
	private:
		AtomSpacePtr as;
		SchemeEval* eval;

	public:

		BuggyNot(void)
		{
			logger().set_level(Logger::DEBUG);
			logger().set_print_to_stdout_flag(true);
#include "test-types.cc"

			as = createAtomSpace();
			eval = SchemeEval::get_scheme_evaluator(as);
			eval->eval("(add-to-load-path \"" PROJECT_SOURCE_DIR "\")");

		}

		~BuggyNot()
		{
			// Erase the log file if no assertions failed.
			if (!CxxTest::TestTracker::tracker().suiteFailed())
				std::remove(logger().get_filename().c_str());
		}

		void setUp(void);

		void tearDown(void) { }

		void test_bugnot(void);
};

/*
 * This function sets up an implication link, and some data.
 */
#define an as->addNode
#define al as->addLink
#define getarity(hand) hand->get_arity()
#define getlink(hand,pos) hand->getOutgoingAtom(pos)

void BuggyNot::setUp(void)
{
	as->clear();
	eval->eval("(load-from-path \"tests/query/test_types.scm\")");
}

/*
 * NotLink causing weird trouble.
 */
void BuggyNot::test_bugnot(void)
{
	logger().debug("BEGIN TEST: %s", __FUNCTION__);

	eval->eval("(load-from-path \"tests/query/buggy-not.scm\")");

	// Create an implication link that will be tested.
	Handle same_rule = eval->apply("is-same-rule", Handle::UNDEFINED);
	Handle trans_rule = eval->apply("transitive-rule", Handle::UNDEFINED);

	// Make sure the scheme file actually loaded!
	TSM_ASSERT("Failed to load test data", Handle::UNDEFINED != same_rule);
	TSM_ASSERT("Failed to load test data", Handle::UNDEFINED != trans_rule);

	// First, deduce if two seemingly different people are the same ...
	Handle same = HandleCast(same_rule->execute(as.get()));
	logger().debug("Same-people list is %s\n", oc_to_string(same).c_str());
	TSM_ASSERT_EQUALS("wrong number of solutions found", 4, getarity(same));

	// Next, deduce that the same properties apply to each person.
	// The bug that this test used to trip had to do with using the same
	// "pm" twice, to perform a second round of matching. It failed to
	// clear all internal state, and in particular, failed to clear the
	// "NotLink" in the optional match.  As a result, the second implication
	// failed, because it was still using a left-over portion of the previous
	// implication link. This was a rather distressing bug ... a very obvious
	// but poor bug, and hadn't been noticed before. Alas.
	Handle trans = HandleCast(trans_rule->execute(as.get()));
	logger().debug("Transitive list is %s\n", oc_to_string(trans).c_str());
	TSM_ASSERT_EQUALS("wrong number of solutions found", 4, getarity(trans));

	logger().debug("END TEST: %s", __FUNCTION__);
}