/*
 * 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 hivemall.utils.collections;

import org.junit.Assert;
import org.junit.Test;

public class IntOpenHashMapTest {

    @Test
    public void testSize() {
        IntOpenHashMap<Float> map = new IntOpenHashMap<Float>(16384);
        map.put(1, Float.valueOf(3.f));
        Assert.assertEquals(Float.valueOf(3.f), map.get(1));
        map.put(1, Float.valueOf(5.f));
        Assert.assertEquals(Float.valueOf(5.f), map.get(1));
        Assert.assertEquals(1, map.size());
    }

    @Test
    public void testPutAndGet() {
        IntOpenHashMap<Integer> map = new IntOpenHashMap<Integer>(16384);
        final int numEntries = 1000000;
        for (int i = 0; i < numEntries; i++) {
            Assert.assertNull(map.put(i, i));
        }
        Assert.assertEquals(numEntries, map.size());
        for (int i = 0; i < numEntries; i++) {
            Integer v = map.get(i);
            Assert.assertEquals(i, v.intValue());
        }
    }

    @Test
    public void testIterator() {
        IntOpenHashMap<Integer> map = new IntOpenHashMap<Integer>(1000);
        IntOpenHashMap.IMapIterator<Integer> itor = map.entries();
        Assert.assertFalse(itor.hasNext());

        final int numEntries = 1000000;
        for (int i = 0; i < numEntries; i++) {
            Assert.assertNull(map.put(i, i));
        }
        Assert.assertEquals(numEntries, map.size());

        itor = map.entries();
        Assert.assertTrue(itor.hasNext());
        while (itor.hasNext()) {
            Assert.assertFalse(itor.next() == -1);
            int k = itor.getKey();
            Integer v = itor.getValue();
            Assert.assertEquals(k, v.intValue());
        }
        Assert.assertEquals(-1, itor.next());
    }

}