/*
 * 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.values.virtual;

import static org.junit.jupiter.api.Assertions.assertArrayEquals;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.neo4j.values.storable.Values.longArray;
import static org.neo4j.values.storable.Values.longValue;
import static org.neo4j.values.virtual.VirtualValues.EMPTY_LIST;
import static org.neo4j.values.virtual.VirtualValues.fromArray;
import static org.neo4j.values.virtual.VirtualValues.list;

import org.junit.jupiter.api.Test;

class ReversedListTest {

    @Test
    void shouldHandleEmptyList() {
        // Given
        ListValue inner = EMPTY_LIST;
        // When
        ListValue reverse = inner.reverse();

        // Then
        assertEquals(inner, reverse);
        assertEquals(inner.hashCode(), reverse.hashCode());
        assertArrayEquals(inner.asArray(), reverse.asArray());
    }

    @Test
    void shouldHandleSingleItemList() {
        // Given
        ListValue inner = list(longValue(5L));

        // When
        ListValue reverse = inner.reverse();

        // Then
        assertEquals(inner, reverse);
        assertEquals(inner.hashCode(), reverse.hashCode());
        assertArrayEquals(inner.asArray(), reverse.asArray());
    }

    @Test
    void shouldReverseList() {
        // Given
        ListValue inner = list(longValue(5L), longValue(6L), longValue(7L));

        // When
        ListValue reverse = inner.reverse();

        // Then
        ListValue expected = list(longValue(7L), longValue(6L), longValue(5L));
        assertEquals(expected, reverse);
        assertEquals(expected.hashCode(), reverse.hashCode());
        assertArrayEquals(expected.asArray(), reverse.asArray());
    }

    @Test
    void reversedListIsStorableIfInnerIsStorable() {
        // Given
        ListValue inner = fromArray(longArray(new long[] {5, 6, 7, 8}));

        // When
        ListValue reverse = inner.reverse();

        // Then
        assertEquals(longArray(new long[] {8, 7, 6, 5}), reverse.toStorableArray());
    }
}
