io.hekate.network.netty.NettyUtilsTest.java Source code

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Here is the source code for io.hekate.network.netty.NettyUtilsTest.java

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/*
 * Copyright 2019 The Hekate Project
 *
 * The Hekate Project licenses this file to you 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.hekate.network.netty;

import io.hekate.HekateTestBase;
import io.hekate.util.async.Waiting;
import io.netty.channel.DefaultEventLoop;
import io.netty.channel.EventLoop;
import io.netty.util.concurrent.EventExecutorGroup;
import io.netty.util.concurrent.Future;
import java.util.concurrent.Exchanger;
import java.util.concurrent.TimeUnit;
import org.junit.Test;

import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertSame;
import static org.junit.Assert.assertTrue;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.ArgumentMatchers.anyLong;
import static org.mockito.ArgumentMatchers.eq;
import static org.mockito.ArgumentMatchers.same;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

public class NettyUtilsTest extends HekateTestBase {
    @Test
    public void testUtilityClass() throws Exception {
        assertValidUtilityClass(NettyUtils.class);
    }

    @Test
    public void testShutdown() throws Exception {
        assertSame(Waiting.NO_WAIT, NettyUtils.shutdown(null));

        EventExecutorGroup mock = mock(EventExecutorGroup.class);

        when(mock.shutdownGracefully(anyLong(), anyLong(), any())).thenReturn(genericMock(Future.class));

        NettyUtils.shutdown(mock);

        verify(mock).shutdownGracefully(eq(0L), eq(Long.MAX_VALUE), same(TimeUnit.MILLISECONDS));
    }

    @Test
    public void testRunAtAllCost() throws Exception {
        EventLoop eventLoop = new DefaultEventLoop();

        try {
            // Check execution on event loop thread.
            Exchanger<Boolean> exchanger = new Exchanger<>();

            NettyUtils.runAtAllCost(eventLoop, () -> {
                try {
                    exchanger.exchange(eventLoop.inEventLoop());
                } catch (InterruptedException e) {
                    // No-op.
                }
            });

            assertTrue(exchanger.exchange(null));

            // Check execution on fallback thread if event loop is terminated.
            NettyUtils.shutdown(eventLoop).awaitUninterruptedly();

            NettyUtils.runAtAllCost(eventLoop, () -> {
                try {
                    exchanger.exchange(eventLoop.inEventLoop());
                } catch (InterruptedException e) {
                    // No-op.
                }
            });

            assertFalse(exchanger.exchange(null));
        } finally {
            NettyUtils.shutdown(eventLoop).awaitUninterruptedly();
        }
    }

    @SuppressWarnings("unchecked")
    private static <T> T genericMock(Class<? super T> classToMock) {
        return (T) mock(classToMock);
    }
}