Int2FloatOpenHashMapTest.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,
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package hivemall.utils.collections;

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

public class Int2FloatOpenHashMapTest {

    @Test
    public void testSize() {
        Int2FloatOpenHashTable map = new Int2FloatOpenHashTable(16384);
        map.put(1, 3.f);
        Assert.assertEquals(3.f, map.get(1), 0.d);
        map.put(1, 5.f);
        Assert.assertEquals(5.f, map.get(1), 0.d);
        Assert.assertEquals(1, map.size());
    }

    @Test
    public void testDefaultReturnValue() {
        Int2FloatOpenHashTable map = new Int2FloatOpenHashTable(16384);
        Assert.assertEquals(0, map.size());
        Assert.assertEquals(-1.f, map.get(1), 0.d);
        float ret = Float.MIN_VALUE;
        map.defaultReturnValue(ret);
        Assert.assertEquals(ret, map.get(1), 0.d);
    }

    @Test
    public void testPutAndGet() {
        Int2FloatOpenHashTable map = new Int2FloatOpenHashTable(16384);
        final int numEntries = 1000000;
        for (int i = 0; i < numEntries; i++) {
            Assert.assertEquals(-1.f, map.put(i, Float.valueOf(i + 0.1f)), 0.d);
        }
        Assert.assertEquals(numEntries, map.size());
        for (int i = 0; i < numEntries; i++) {
            Float v = map.get(i);
            Assert.assertEquals(i + 0.1f, v.floatValue(), 0.d);
        }
    }

    @Test
    public void testIterator() {
        Int2FloatOpenHashTable map = new Int2FloatOpenHashTable(1000);
        Int2FloatOpenHashTable.IMapIterator itor = map.entries();
        Assert.assertFalse(itor.hasNext());

        final int numEntries = 1000000;
        for (int i = 0; i < numEntries; i++) {
            Assert.assertEquals(-1.f, map.put(i, Float.valueOf(i + 0.1f)), 0.d);
        }
        Assert.assertEquals(numEntries, map.size());

        itor = map.entries();
        Assert.assertTrue(itor.hasNext());
        while (itor.hasNext()) {
            Assert.assertFalse(itor.next() == -1);
            int k = itor.getKey();
            Float v = itor.getValue();
            Assert.assertEquals(k + 0.1f, v.floatValue(), 0.d);
        }
        Assert.assertEquals(-1, itor.next());
    }

}