/*
 * 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.api;

import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
import static org.junit.jupiter.api.Assertions.assertThrows;

import org.junit.jupiter.api.Test;
import org.neo4j.graphdb.Transaction;
import org.neo4j.internal.kernel.api.exceptions.TransactionFailureException;
import org.neo4j.kernel.api.KernelTransaction;
import org.neo4j.kernel.impl.coreapi.InternalTransaction;
import org.neo4j.kernel.internal.GraphDatabaseAPI;
import org.neo4j.memory.MemoryTracker;
import org.neo4j.test.extension.DbmsExtension;
import org.neo4j.test.extension.Inject;

@DbmsExtension
class TransactionMemoryTrackerIT {
    @Inject
    private GraphDatabaseAPI db;

    @Test
    void failToAllocateOnClosedTransaction() throws TransactionFailureException {
        try (Transaction transaction = db.beginTx()) {
            KernelTransaction kernelTransaction = ((InternalTransaction) transaction).kernelTransaction();
            kernelTransaction.closeTransaction();

            MemoryTracker memoryTracker = kernelTransaction.memoryTracker();
            assertThrows(AssertionError.class, () -> memoryTracker.allocateHeap(1));
            assertThrows(AssertionError.class, () -> memoryTracker.allocateNative(1));
        }
    }

    @Test
    void allocateOnOpenTransaction() {
        try (Transaction transaction = db.beginTx()) {
            KernelTransaction kernelTransaction = ((InternalTransaction) transaction).kernelTransaction();

            MemoryTracker memoryTracker = kernelTransaction.memoryTracker();
            assertDoesNotThrow(() -> memoryTracker.allocateHeap(1));
            assertDoesNotThrow(() -> memoryTracker.allocateNative(1));
            assertDoesNotThrow(() -> memoryTracker.releaseNative(1));
            assertDoesNotThrow(() -> memoryTracker.releaseHeap(1));
        }
    }
}
