opencog-atomspace / tests / atoms / pattern / PatternUtilsUTest.cxxtest

/*
 * tests/atoms/pattern/PatternUtilsUTest.cxxtest
 *
 * Copyright (C) 2020 SingularityNET Foundation
 * All Rights Reserved
 *
 * Author: Nil Geisweiller
 *
 * 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/util/Logger.h>
#include <opencog/atomspace/AtomSpace.h>
#include <opencog/atoms/pattern/PatternUtils.h>

#include <cxxtest/TestSuite.h>

using namespace opencog;

#define an _as.add_node
#define al _as.add_link

// Test various functions in PatternUtils.h
//
class PatternUtilsUTest: public CxxTest::TestSuite
{
private:
	AtomSpace _as;

	Handle A, B, X, Y;

public:
	PatternUtilsUTest()
	{
		logger().set_print_to_stdout_flag(true);
		logger().set_level(Logger::INFO);
		logger().set_timestamp_flag(false);
	}

	void setUp()
	{
		A = an(CONCEPT_NODE, "A");
		B = an(CONCEPT_NODE, "B");
		X = an(VARIABLE_NODE, "$X");
		Y = an(VARIABLE_NODE, "$Y");
	}

	void tearDown()
	{
		_as.clear();
	}

	void test_is_constant_1();
	void test_is_constant_2();
	void test_is_constant_3();
	void test_is_constant_4();
	void test_is_constant_5();
};

/**
 * Test is_constant on a constant inheritance link
 */
void PatternUtilsUTest::test_is_constant_1()
{
	logger().info("BEGIN TEST: %s", __FUNCTION__);

	Handle InhAB = al(INHERITANCE_LINK, A, B);

	TS_ASSERT(is_constant({}, InhAB));
}

/**
 * Test is_constant on an inheritance link with variables treated as
 * constants.
 */
void PatternUtilsUTest::test_is_constant_2()
{
	logger().info("BEGIN TEST: %s", __FUNCTION__);

	Handle InhXY = al(INHERITANCE_LINK, X, Y);

	TS_ASSERT(is_constant({}, InhXY));
}

/**
 * Test is_constant on an inheritance link with variables not treated as
 * constants.
 */
void PatternUtilsUTest::test_is_constant_3()
{
	logger().info("BEGIN TEST: %s", __FUNCTION__);

	Handle InhXY = al(INHERITANCE_LINK, X, Y);

	TS_ASSERT(not is_constant({X, Y}, InhXY));
}

/**
 * Test is_constant on an evaluatable link with constants
 */
void PatternUtilsUTest::test_is_constant_4()
{
	logger().info("BEGIN TEST: %s", __FUNCTION__);

	Handle IdAB = createLink(IDENTICAL_LINK, A, B);

	TS_ASSERT(not is_constant({}, IdAB));
}

/**
 * Test is_constant on an evaluatable link with variables
 */
void PatternUtilsUTest::test_is_constant_5()
{
	logger().info("BEGIN TEST: %s", __FUNCTION__);

	Handle IdXY = al(IDENTICAL_LINK, X, Y);

	TS_ASSERT(not is_constant({X, Y}, IdXY));
}