modules/core/src/test/java/org/apache/ignite/util/GridQueueSelfTest.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.util;

import org.apache.ignite.internal.util.GridQueue;
import org.apache.ignite.internal.util.typedef.X;
import org.apache.ignite.testframework.junits.common.GridCommonAbstractTest;
import org.apache.ignite.testframework.junits.common.GridCommonTest;
import org.junit.Test;

/**
 * Grid utils tests.
 */
@GridCommonTest(group = "Utils")
public class GridQueueSelfTest extends GridCommonAbstractTest {
    /**
     *
     */
    @Test
    public void testQueue() {
        GridQueue<String> q = new GridQueue<>();
        for (char c = 'a'; c <= 'z'; c++)
            q.offer(Character.toString(c));

        assertEquals('z' - 'a' + 1, q.size());

        char ch = 'a';

        for (String c = q.poll(); c != null; c = q.poll()) {
            X.println(c);

            assertEquals(Character.toString(ch++), c);
        }

        assert q.isEmpty();

        for (char c = 'A'; c <= 'Z'; c++)
            q.offer(Character.toString(c));

        assertEquals('Z' - 'A' + 1, q.size());

        ch = 'A';

        for (String s : q) {
            X.println(s);

            assertEquals(Character.toString(ch++), s);
        }

        q.remove("O");

        assertEquals('Z' - 'A', q.size());

        for (String c = q.poll(); c != null; c = q.poll())
            assert !"O".equals(c);

        assert q.isEmpty();
    }
}