opencog-atomspace / tests / query / PresentUTest.cxxtest

/*
 * tests/query/PresentUTest.cxxtest
 *
 * Copyright (C) 2019 Linas Vepstas
 * 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>

using namespace opencog;

#define al as->add_link
#define an as->add_node

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

public:
	PresentUTest(void)
	{
		logger().set_level(Logger::DEBUG);
		logger().set_print_to_stdout_flag(true);

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

	}

	~PresentUTest()
	{
		// 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_literal(void);
	void test_virtual(void);
	void test_monotonicity(void);
};

void PresentUTest::tearDown(void)
{
	as->clear();
}

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

#define getarity(hand) hand->get_arity()

/*
 * A PresentLink should act as a quotation, i.e. the thing it wraps
 * should be interpreted as a literal, and not an evaluatable.
 */
void PresentUTest::test_literal(void)
{
	logger().debug("BEGIN TEST: %s", __FUNCTION__);

	eval->eval("(load-from-path \"tests/query/present.scm\")");

	Handle get5 = eval->eval_h("(cog-execute! (CollectionOf get5))");
	Handle ans5 = eval->eval_h("ans5");

	printf("Expecting: %s\n", ans5->to_string().c_str());
	printf("Got: %s\n", get5->to_string().c_str());
	TS_ASSERT_EQUALS(get5, ans5);

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

/**
 * Test PresentLink in conjunction with a virtual link.
 */
void PresentUTest::test_virtual(void)
{
	logger().debug("BEGIN TEST: %s", __FUNCTION__);

	eval->eval("(load-from-path \"tests/query/present-virtual.scm\")");

	Handle query = eval->eval_h("query");
	Handle results = HandleCast(query->execute());
	Handle expected = al(SET_LINK, {an(CONCEPT_NODE, "OK")});

	printf("Expecting: %s\n", expected->to_string().c_str());
	printf("Got: %s\n", results->to_string().c_str());
	TS_ASSERT_EQUALS(results, expected);

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

/**
 * Test the monotonicity of PresentLink.  This is for issue
 * https://github.com/opencog/atomspace/issues/2886
 * (This turned out to be an unbalanced-quotation issue.)
 */
void PresentUTest::test_monotonicity(void)
{
	logger().debug("BEGIN TEST: %s", __FUNCTION__);

	eval->eval("(load-from-path \"tests/query/present-monotonicity.scm\")");

	Handle query = eval->eval_h("query");
	Handle results = HandleCast(query->execute());
	Handle P = an(PREDICATE_NODE, "P");
	Handle Q = an(PREDICATE_NODE, "Q");
	Handle expected = al(SET_LINK, {al(LIST_LINK, {P, Q})});

	printf("Expecting: %s\n", expected->to_string().c_str());
	printf("Got: %s\n", results->to_string().c_str());
	TS_ASSERT_EQUALS(results, expected);

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

#undef al
#undef an