/*
 * 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.collection;

import static org.assertj.core.api.Assertions.assertThat;
import static org.junit.jupiter.api.Assertions.assertThrows;

import org.junit.jupiter.api.Test;

class RangeLongIteratorTest {
    @Test
    void shouldIterateOverSubsetOfData() {
        // given
        long[] array = new long[] {1L, 2L, 3L, 4L, 5L};

        // when
        RangeLongIterator iterator = new RangeLongIterator(array, 2, 2);

        // then
        assertThat(iterator.next()).isEqualTo(3L);
        assertThat(iterator.next()).isEqualTo(4L);
        assertThat(iterator.hasNext()).isEqualTo(false);
    }

    @Test
    void shouldNotBeAbleToCreateInvalidRanges() {
        // given
        long[] array = new long[] {1L, 2L, 3L, 4L, 5L};

        // expect
        assertThrows(IllegalArgumentException.class, () -> new RangeLongIterator(array, -1, 0));
        assertThrows(IllegalArgumentException.class, () -> new RangeLongIterator(array, 0, -1));
        assertThrows(IllegalArgumentException.class, () -> new RangeLongIterator(array, 10, 2));
        assertThrows(IllegalArgumentException.class, () -> new RangeLongIterator(array, 0, 12));
        assertThrows(IllegalArgumentException.class, () -> new RangeLongIterator(array, 4, 4));
    }
}
