opencog-atomspace / tests / atoms / evaluation / ExclusiveLinkUTest.cxxtest

/*
 * tests/atoms/ExclusiveLinkUTest.cxxtest
 *
 * Copyright (C) 2020 Linas Vepstas
 * All Rights Reserved
 *
 * Author: Linas Vepstas
 *
 * 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>

using namespace opencog;

class ExclusiveLinkUTest :  public CxxTest::TestSuite
{
private:
	AtomSpace _as;

public:
	ExclusiveLinkUTest()
	{
		logger().set_print_to_stdout_flag(true);
		logger().set_timestamp_flag(false);
		logger().set_sync_flag(true);
	}

	void setUp() {}

	void tearDown() {}

	void test_exclusive();
};

#define N _as.add_node
#define L _as.add_link

// Basic test
void ExclusiveLinkUTest::test_exclusive()
{
	logger().info("BEGIN TEST: %s", __FUNCTION__);

	Handle A = N(CONCEPT_NODE, "A");
	Handle B = N(CONCEPT_NODE, "B");
	Handle C = N(CONCEPT_NODE, "C");
	Handle D = N(CONCEPT_NODE, "D");

	// bevaluate() on an naked link with all distinct atoms
	Handle S = createLink(EXCLUSIVE_LINK, A, B, C, D);
	bool result = S->bevaluate(&_as);
	printf("Got result=%s\n", result ? "true" : "false");
	TS_ASSERT(result);

	// bevaluate() on naked link with duplicates should return false
	Handle E = createLink(EXCLUSIVE_LINK, A, B, C, A);
	result = E->bevaluate(&_as);
	printf("Got duplicate result=%s\n", result ? "true" : "false");
	TS_ASSERT(not result);

	// Adding to AtomSpace should succeed for distinct atoms
	S = L(EXCLUSIVE_LINK, A, B, C, D);
	TS_ASSERT(S != nullptr);

	// Cannot add illegal ExclusiveLink.
	TS_ASSERT_THROWS_ANYTHING(L(EXCLUSIVE_LINK, A, B, C, A));

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