/*
 * Copyright (c) 2017, 2018 Oracle and/or its affiliates. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.helidon.webserver.testsupport;

import java.lang.ref.WeakReference;
import java.util.LinkedList;

/**
 * The generic test utils methods.
 */
public final class TestUtils {

    private TestUtils() {
    }

    /**
     * Programmatically forces GC run.
     */
    public static void forceGc() {
        LinkedList<WeakReference<int[]>> arrays = new LinkedList<>();
        loop: while (true) {
            arrays.add(new WeakReference<>(new int[1_000_000]));

            for (WeakReference<int[]> array : arrays) {
                if (array.get() == null) {
                    break loop;
                }
            }
        }
    }
}
