com.cloudera.oryx.common.collection.LongFloatMapTest.java Source code

Introduction

Here is the source code for com.cloudera.oryx.common.collection.LongFloatMapTest.java

Source

/*
 * Copyright (c) 2013, Cloudera, Inc. All Rights Reserved.
 *
 * Cloudera, Inc. 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
 *
 * This software 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.
 */

/*
 * 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 com.cloudera.oryx.common.collection;

import java.util.Map;

import com.cloudera.oryx.common.OryxTest;
import com.google.common.collect.Maps;
import org.apache.commons.math3.random.RandomGenerator;
import org.junit.Test;

import com.cloudera.oryx.common.random.RandomManager;

/**
 * @author Sean Owen
 * @author Mahout
 */
public final class LongFloatMapTest extends OryxTest {

    @Test
    public void testPutAndGet() {
        LongFloatMap map = new LongFloatMap();
        assertNaN(map.get(500000L));
        map.put(500000L, 2.0f);
        assertEquals(2.0f, map.get(500000L));
    }

    @Test
    public void testRemove() {
        LongFloatMap map = new LongFloatMap();
        map.put(500000L, 2.0f);
        map.remove(500000L);
        assertEquals(0, map.size());
        assertTrue(map.isEmpty());
        assertNaN(map.get(500000L));
    }

    @Test
    public void testClear() {
        LongFloatMap map = new LongFloatMap();
        map.put(500000L, 2.0f);
        map.clear();
        assertEquals(0, map.size());
        assertTrue(map.isEmpty());
        assertNaN(map.get(500000L));
    }

    @Test
    public void testSizeEmpty() {
        LongFloatMap map = new LongFloatMap();
        assertEquals(0, map.size());
        assertTrue(map.isEmpty());
        map.put(500000L, 2.0f);
        assertEquals(1, map.size());
        assertFalse(map.isEmpty());
        map.remove(500000L);
        assertEquals(0, map.size());
        assertTrue(map.isEmpty());
    }

    @Test
    public void testContains() {
        LongFloatMap map = buildTestFastMap();
        assertTrue(map.containsKey(500000L));
        assertTrue(map.containsKey(47L));
        assertTrue(map.containsKey(2L));
        assertFalse(map.containsKey(999));
    }

    @Test
    public void testRehash() {
        LongFloatMap map = buildTestFastMap();
        map.remove(500000L);
        map.rehash();
        assertNaN(map.get(500000L));
        assertEquals(3.0f, map.get(47L));
    }

    @Test
    public void testVersusHashMap() {
        LongFloatMap actual = new LongFloatMap();
        Map<Long, Float> expected = Maps.newHashMap();
        RandomGenerator r = RandomManager.getRandom();
        for (int i = 0; i < 1000000; i++) {
            double d = r.nextDouble();
            Long key = (long) r.nextInt(100);
            if (d < 0.4) {
                Number expectedValue = expected.get(key);
                float actualValue = actual.get(key);
                if (expectedValue == null) {
                    assertNaN(actualValue);
                } else {
                    assertEquals(expectedValue.floatValue(), actualValue);
                }
            } else {
                if (d < 0.7) {
                    expected.put(key, 3.0f);
                    actual.put(key, 3.0f);
                } else {
                    expected.remove(key);
                    actual.remove(key);
                }
                assertEquals(expected.size(), actual.size());
                assertEquals(expected.isEmpty(), actual.isEmpty());
            }
        }
    }

    @Test
    public void testMaxSize() {
        LongFloatMap map = new LongFloatMap();
        map.put(4, 3.0f);
        assertEquals(1, map.size());
        map.put(47L, 3.0f);
        assertEquals(2, map.size());
        assertNaN(map.get(500000L));
        map.put(47L, 5.0f);
        assertEquals(2, map.size());
        assertEquals(5.0f, map.get(47L));
    }

    private static LongFloatMap buildTestFastMap() {
        LongFloatMap map = new LongFloatMap();
        map.put(500000L, 2.0f);
        map.put(47L, 3.0f);
        map.put(2L, 5.0f);
        return map;
    }

}