/*
 * Copyright (c) "Neo4j"
 * Neo4j Sweden AB [http://neo4j.com]
 *
 * This file is part of Neo4j.
 *
 * Neo4j is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * 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 General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.neo4j.kernel.impl.newapi;

import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertTrue;

import org.junit.jupiter.api.Test;
import org.neo4j.kernel.api.index.IndexProgressor;

class IndexCursorTest {
    @Test
    void shouldClosePreviousBeforeReinitialize() {
        // given
        StubIndexCursor cursor = new StubIndexCursor();
        StubProgressor progressor = new StubProgressor();
        cursor.initialize(progressor);
        assertFalse(progressor.isClosed, "open before re-initialize");

        // when
        StubProgressor otherProgressor = new StubProgressor();
        cursor.initialize(otherProgressor);

        // then
        assertTrue(progressor.isClosed, "closed after re-initialize");
        assertFalse(otherProgressor.isClosed, "new still open");
    }

    private static class StubIndexCursor extends IndexCursor<StubProgressor, StubIndexCursor> {
        StubIndexCursor() {
            super(c -> {});
        }

        @Override
        public boolean next() {
            return false;
        }

        @Override
        public void closeInternal() {}

        @Override
        public boolean isClosed() {
            return false;
        }
    }

    private static class StubProgressor implements IndexProgressor {
        boolean isClosed;

        StubProgressor() {
            isClosed = false;
        }

        @Override
        public boolean next() {
            return false;
        }

        @Override
        public void close() {
            isClosed = true;
        }
    }
}
