hazelcast-master/hazelcast/src/test/java/com/hazelcast/map/impl/mapstore/writebehind/CoalescedWriteBehindQueueTest.java
/*
 * Copyright (c) 2008-2023, Hazelcast, Inc. 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 com.hazelcast.map.impl.mapstore.writebehind;

import com.hazelcast.internal.serialization.SerializationService;
import com.hazelcast.internal.serialization.impl.DefaultSerializationServiceBuilder;
import com.hazelcast.map.impl.mapstore.writebehind.entry.DelayedEntries;
import com.hazelcast.map.impl.mapstore.writebehind.entry.DelayedEntry;
import com.hazelcast.internal.serialization.Data;
import com.hazelcast.test.HazelcastParallelClassRunner;
import com.hazelcast.test.HazelcastTestSupport;
import com.hazelcast.test.annotation.ParallelJVMTest;
import com.hazelcast.test.annotation.QuickTest;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.junit.runner.RunWith;

import java.util.Collections;

import static com.hazelcast.map.impl.mapstore.writebehind.entry.DelayedEntries.newAddedDelayedEntry;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;

@RunWith(HazelcastParallelClassRunner.class)
@Category({QuickTest.class, ParallelJVMTest.class})
public class CoalescedWriteBehindQueueTest extends HazelcastTestSupport {

    private SerializationService serializationService = new DefaultSerializationServiceBuilder().build();
    private CoalescedWriteBehindQueue queue = new CoalescedWriteBehindQueue();

    @Test
    public void test_addFirst() throws Exception {
        queue.addFirst(Collections.singletonList(newEntry(1)));

        assertEquals(1, queue.size());
    }

    @Test
    public void test_addLast() throws Exception {
        queue.addLast(newEntry(1), false);

        assertEquals(1, queue.size());
    }

    @Test
    public void test_removeFirstOccurrence() throws Exception {
        DelayedEntry<Data, Object> entry = newEntry(1);
        queue.addLast(entry, false);
        queue.removeFirstOccurrence(entry);

        assertEquals(0, queue.size());
    }

    @Test
    public void test_removeFirstOccurrence_whenSequenceNumberLower() throws Exception {
        DelayedEntry<Data, Object> entry = newEntry(1, 10);
        entry.setSequence(1);
        queue.addLast(entry, false);
        DelayedEntry<Data, Object> entry2 = newEntry(1, 10); // sequence is 0
        assertFalse(queue.removeFirstOccurrence(entry2));

        assertEquals(1, queue.size());
    }

    @Test
    public void test_contains() throws Exception {
        DelayedEntry<Data, Object> entry = newEntry(1);
        queue.addLast(entry, false);

        assertTrue(queue.contains(entry));
    }

    @Test
    public void test_size() throws Exception {
        DelayedEntry<Data, Object> entry = newEntry(1);
        queue.addLast(entry, false);
        queue.addLast(entry, false);
        queue.addLast(entry, false);

        assertEquals(1, queue.size());
    }

    @Test
    public void test_clear() throws Exception {
        DelayedEntry<Data, Object> entry = newEntry(1);
        queue.addLast(entry, false);

        queue.clear();
        assertEquals(0, queue.size());
    }

    private DelayedEntry<Data, Object> newEntry(Object key) {
        return DelayedEntries.newNullEntry(serializationService.toData(key));
    }

    private DelayedEntry<Data, Object> newEntry(Object key, Object value) {
        return newAddedDelayedEntry(serializationService.toData(key),
                serializationService.toData(value), 0L, 0L, 0, null);
    }
}
