modules/core/src/test/java/org/apache/ignite/internal/util/GridHandleTableSelfTest.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF 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 org.apache.ignite.internal.util;

import org.apache.ignite.testframework.junits.common.GridCommonAbstractTest;
import org.junit.Test;

/**
 * Test for {@link GridHandleTable}.
 */
public class GridHandleTableSelfTest extends GridCommonAbstractTest {
    /** */
    @Test
    public void testGrow() {
        GridHandleTable table = new GridHandleTable(8, 2);

        for (int i = 0; i < 16; i++)
            assertEquals(-1, table.putIfAbsent(i));

        Object testObj = new Object();

        assertEquals(-1, table.putIfAbsent(testObj));

        assertEquals(16, table.putIfAbsent(testObj));

        int cnt = 0;

        for (Object obj : table.objects()) {
            if (obj == testObj)
                cnt++;
        }

        assertEquals(1, cnt);
    }

    /** */
    @Test
    public void testShrink() {
        GridHandleTable table = new GridHandleTable(8, 3);

        assertEquals(8, table.objects().length);

        for (int i = 0; i < 32; i++)
            assertEquals(-1, table.putIfAbsent(i));

        assertEquals(35, table.objects().length);

        table.clear();

        table.clear();

        assertEquals(17, table.objects().length);

        table.clear();

        assertEquals(8, table.objects().length);
    }
}