UnifiedMapTest.java

/*
 * Copyright (c) 2018 Goldman Sachs and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * and Eclipse Distribution License v. 1.0 which accompany this distribution.
 * The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 */

package org.eclipse.collections.impl.map.mutable;

import java.lang.reflect.Field;
import java.util.Collection;
import java.util.Map;
import java.util.Set;

import org.eclipse.collections.api.block.procedure.Procedure;
import org.eclipse.collections.api.list.MutableList;
import org.eclipse.collections.api.map.MutableMap;
import org.eclipse.collections.api.tuple.Pair;
import org.eclipse.collections.impl.block.factory.Predicates2;
import org.eclipse.collections.impl.block.factory.Procedures;
import org.eclipse.collections.impl.block.function.PassThruFunction0;
import org.eclipse.collections.impl.factory.Lists;
import org.eclipse.collections.impl.factory.Maps;
import org.eclipse.collections.impl.list.Interval;
import org.eclipse.collections.impl.list.mutable.FastList;
import org.eclipse.collections.impl.math.IntegerSum;
import org.eclipse.collections.impl.math.Sum;
import org.eclipse.collections.impl.math.SumProcedure;
import org.eclipse.collections.impl.parallel.BatchIterable;
import org.eclipse.collections.impl.set.mutable.UnifiedSet;
import org.eclipse.collections.impl.test.Verify;
import org.eclipse.collections.impl.tuple.Tuples;
import org.eclipse.collections.impl.utility.ArrayIterate;
import org.junit.Assert;
import org.junit.Test;

public class UnifiedMapTest extends UnifiedMapTestCase
{
    @Override
    public <K, V> MutableMap<K, V> newMap()
    {
        return UnifiedMap.newMap();
    }

    @Override
    public <K, V> MutableMap<K, V> newMapWithKeyValue(K key, V value)
    {
        return UnifiedMap.newWithKeysValues(key, value);
    }

    @Override
    public <K, V> MutableMap<K, V> newMapWithKeysValues(K key1, V value1, K key2, V value2)
    {
        return UnifiedMap.newWithKeysValues(key1, value1, key2, value2);
    }

    @Override
    public <K, V> MutableMap<K, V> newMapWithKeysValues(
            K key1, V value1, K key2, V value2, K key3, V value3)
    {
        return UnifiedMap.newWithKeysValues(key1, value1, key2, value2, key3, value3);
    }

    @Override
    public <K, V> MutableMap<K, V> newMapWithKeysValues(
            K key1, V value1, K key2, V value2, K key3, V value3, K key4, V value4)
    {
        return UnifiedMap.newWithKeysValues(key1, value1, key2, value2, key3, value3, key4, value4);
    }

    @Test
    public void newMap_throws()
    {
        Verify.assertThrows(IllegalArgumentException.class, () -> new UnifiedMap<Integer, Integer>(-1, 0.5f));
        Verify.assertThrows(IllegalArgumentException.class, () -> new UnifiedMap<Integer, Integer>(1, 0.0f));
        Verify.assertThrows(IllegalArgumentException.class, () -> new UnifiedMap<Integer, Integer>(1, -0.5f));
        Verify.assertThrows(IllegalArgumentException.class, () -> new UnifiedMap<Integer, Integer>(1, 1.5f));
    }

    @Test
    public void newMapTest()
    {
        for (int i = 1; i < 17; i++)
        {
            this.assertPresizedMap(i, 0.75f);
        }
        this.assertPresizedMap(31, 0.75f);
        this.assertPresizedMap(32, 0.75f);
        this.assertPresizedMap(34, 0.75f);
        this.assertPresizedMap(60, 0.75f);
        this.assertPresizedMap(64, 0.70f);
        this.assertPresizedMap(68, 0.70f);
        this.assertPresizedMap(60, 0.70f);
        this.assertPresizedMap(1025, 0.80f);
        this.assertPresizedMap(1024, 0.80f);
        this.assertPresizedMap(1025, 0.80f);
        this.assertPresizedMap(1024, 0.805f);
    }

    private void assertPresizedMap(int initialCapacity, float loadFactor)
    {
        try
        {
            Field tableField = UnifiedMap.class.getDeclaredField("table");
            tableField.setAccessible(true);

            Object[] table = (Object[]) tableField.get(UnifiedMap.newMap(initialCapacity, loadFactor));

            int size = (int) Math.ceil(initialCapacity / loadFactor);
            int capacity = 1;
            while (capacity < size)
            {
                capacity <<= 1;
            }
            capacity <<= 1;

            Assert.assertEquals(capacity, table.length);
        }
        catch (SecurityException ignored)
        {
            Assert.fail("Unable to modify the visibility of the table on UnifiedMap");
        }
        catch (NoSuchFieldException ignored)
        {
            Assert.fail("No field named table UnifiedMap");
        }
        catch (IllegalAccessException ignored)
        {
            Assert.fail("No access the field table in UnifiedMap");
        }
    }

    @Test
    public void constructorOfPairs()
    {
        Assert.assertEquals(
                UnifiedMap.newWithKeysValues(1, "one", 2, "two", 3, "three"),
                UnifiedMap.newMapWith(Tuples.pair(1, "one"), Tuples.pair(2, "two"), Tuples.pair(3, "three")));
    }

    @Test
    public void constructorOfIterableOfPairs()
    {
        Pair<Integer, String> pair1 = Tuples.pair(1, "One");
        Pair<Integer, String> pair2 = Tuples.pair(2, "Two");
        Pair<Integer, String> pair3 = Tuples.pair(3, "Three");
        Pair<Integer, String> pair4 = Tuples.pair(4, "Four");
        Assert.assertEquals(
                UnifiedMap.newMapWith(pair1, pair2, pair3, pair4),
                UnifiedMap.newMapWith(FastList.newListWith(pair1, pair2, pair3, pair4)));

        Assert.assertEquals(
                UnifiedMap.newMapWith(pair1, pair2, pair3, pair4),
                UnifiedMap.newMapWith(UnifiedSet.newSetWith(pair1, pair2, pair3, pair4)));
    }

    @Test
    public void batchForEach()
    {
        UnifiedMap<String, Integer> map = UnifiedMap.<String, Integer>newMap(5).withKeysValues("1", 1, "2", 2, "3", 3, "4", 4);
        this.batchForEachTestCases(map, 10);

        UnifiedMap<Integer, Integer> collisions = UnifiedMap.<Integer, Integer>newMap(5).withKeysValues(COLLISION_1, 1, COLLISION_2, 2, COLLISION_3, 3, 1, 4).withKeysValues(2, 5, 3, 6);
        this.batchForEachChains(collisions, 21);

        UnifiedMap<Integer, Integer> nulls = UnifiedMap.<Integer, Integer>newMap(100).withKeysValues(null, 10, 1, null, 2, 11, 3, 12).withKeysValues(4, null, 5, null);
        this.batchForEachNullHandling(nulls, 36);

        this.batchForEachEmptyBatchIterable(UnifiedMap.<Integer, Integer>newMap());
    }

    @Test
    public void batchForEachKey()
    {
        Set<Integer> keys = UnifiedMap.<Integer, String>newMap(5).withKeysValues(1, "1", 2, "2", 3, "3", 4, "4").keySet();
        this.batchForEachTestCases((BatchIterable<Integer>) keys, 10);

        Set<Integer> collisions = UnifiedMap.<Integer, Integer>newMap(5).withKeysValues(COLLISION_1, 1, COLLISION_2, 2, COLLISION_3, 3, 1, 4).withKeysValues(2, 5, 3, 6).keySet();
        this.batchForEachChains((BatchIterable<Integer>) collisions, 57);

        Set<Integer> nulls = UnifiedMap.<Integer, Integer>newMap(100).withKeysValues(null, 10, 1, null, 2, 11, 3, 12).withKeysValues(4, null, 5, null).keySet();
        this.batchForEachNullHandling((BatchIterable<Integer>) nulls, 16);

        this.batchForEachEmptyBatchIterable((BatchIterable<Integer>) UnifiedMap.<Integer, Integer>newMap().keySet());
    }

    @Test
    public void batchForEachValue()
    {
        Collection<Integer> values = UnifiedMap.<String, Integer>newMap(5).withKeysValues("1", 1, "2", 2, "3", 3, "4", 4).values();
        this.batchForEachTestCases((BatchIterable<Integer>) values, 10);

        Collection<Integer> collisions = UnifiedMap.<Integer, Integer>newMap(5).withKeysValues(COLLISION_1, 1, COLLISION_2, 2, COLLISION_3, 3, 1, 4).withKeysValues(2, 5, 3, 6).values();
        this.batchForEachChains((BatchIterable<Integer>) collisions, 21);

        Collection<Integer> nulls = UnifiedMap.<Integer, Integer>newMap(100).withKeysValues(null, 10, 1, null, 2, 11, 3, 12).withKeysValues(4, null, 5, null).values();
        this.batchForEachNullHandling((BatchIterable<Integer>) nulls, 36);

        this.batchForEachEmptyBatchIterable((BatchIterable<Integer>) UnifiedMap.<Integer, Integer>newMap().values());
    }

    @Test
    public void batchForEachEntry()
    {
        //Testing batch size of 1 to 16 with no chains
        BatchIterable<Map.Entry<Integer, Integer>> entries =
                (BatchIterable<Map.Entry<Integer, Integer>>) UnifiedMap.newWithKeysValues(1, 1, 2, 2, 3, 3, 4, 4).entrySet();
        for (int sectionCount = 1; sectionCount <= 16; ++sectionCount)
        {
            Sum sum = new IntegerSum(0);
            for (int sectionIndex = 0; sectionIndex < sectionCount; ++sectionIndex)
            {
                entries.batchForEach(new EntrySumProcedure(sum), sectionIndex, sectionCount);
            }
            Assert.assertEquals(20, sum.getValue());
        }
    }

    @Test
    public void batchForEachEntry_chains()
    {
        BatchIterable<Map.Entry<Integer, Integer>> collisions =
                (BatchIterable<Map.Entry<Integer, Integer>>) UnifiedMap.<Integer, Integer>newMap(5).withKeysValues(
                        COLLISION_1, 1, COLLISION_2, 2, COLLISION_3, 3, 1, 4).withKeysValues(2, 5, 3, 6).entrySet();
        //Testing 1 batch with chains
        Sum sum2 = new IntegerSum(0);
        //testing getBatchCount returns 1
        int numBatches = collisions.getBatchCount(100000);
        for (int i = 0; i < numBatches; ++i)
        {
            collisions.batchForEach(new EntrySumProcedure(sum2), i, numBatches);
        }
        Assert.assertEquals(1, numBatches);
        Assert.assertEquals(78, sum2.getValue());

        //Testing 3 batches with chains and uneven last batch
        Sum sum3 = new IntegerSum(0);
        for (int i = 0; i < 5; ++i)
        {
            collisions.batchForEach(new EntrySumProcedure(sum3), i, 5);
        }
        Assert.assertEquals(78, sum3.getValue());
    }

    @Test
    public void batchForEachEntry_null_handling()
    {
        //Testing batchForEach handling null keys and null values
        Sum sum4 = new IntegerSum(0);
        BatchIterable<Map.Entry<Integer, Integer>> nulls =
                (BatchIterable<Map.Entry<Integer, Integer>>) UnifiedMap.<Integer, Integer>newMap(100).withKeysValues(
                        null, 10, 1, null, 2, 11, 3, 12).withKeysValues(4, null, 5, null).entrySet();
        for (int i = 0; i < nulls.getBatchCount(7); ++i)
        {
            nulls.batchForEach(each -> {
                sum4.add(each.getKey() == null ? 1 : each.getKey());
                sum4.add(each.getValue() == null ? 1 : each.getValue());
            }, i, nulls.getBatchCount(7));
        }
        Assert.assertEquals(52, sum4.getValue());
    }

    @Test
    public void batchForEachEntry_emptySet()
    {
        //Test batchForEach on empty set, it should simply do nothing and not throw any exceptions
        Sum sum5 = new IntegerSum(0);
        BatchIterable<Map.Entry<Integer, Integer>> empty = (BatchIterable<Map.Entry<Integer, Integer>>) UnifiedMap.newMap().entrySet();
        empty.batchForEach(new EntrySumProcedure(sum5), 0, empty.getBatchCount(1));
        Assert.assertEquals(0, sum5.getValue());
    }

    private void batchForEachTestCases(BatchIterable<Integer> batchIterable, int expectedValue)
    {
        //Testing batch size of 1 to 16 with no chains
        for (int sectionCount = 1; sectionCount <= 16; ++sectionCount)
        {
            Sum sum = new IntegerSum(0);
            for (int sectionIndex = 0; sectionIndex < sectionCount; ++sectionIndex)
            {
                batchIterable.batchForEach(new SumProcedure<>(sum), sectionIndex, sectionCount);
            }
            Assert.assertEquals(expectedValue, sum.getValue());
        }
    }

    private void batchForEachChains(BatchIterable<Integer> batchIterable, int expectedValue)
    {
        //Testing 1 batch with chains
        Sum sum = new IntegerSum(0);
        //testing getBatchCount returns 1
        int numBatches = batchIterable.getBatchCount(100000);
        for (int i = 0; i < numBatches; ++i)
        {
            batchIterable.batchForEach(new SumProcedure<>(sum), i, numBatches);
        }
        Assert.assertEquals(1, numBatches);
        Assert.assertEquals(expectedValue, sum.getValue());

        //Testing 3 batches with chains and uneven last batch
        Sum sum2 = new IntegerSum(0);
        for (int i = 0; i < 5; ++i)
        {
            batchIterable.batchForEach(new SumProcedure<>(sum2), i, 5);
        }
        Assert.assertEquals(expectedValue, sum2.getValue());
    }

    private void batchForEachNullHandling(BatchIterable<Integer> batchIterable, int expectedValue)
    {
        //Testing batchForEach handling null keys and null values
        Sum sum = new IntegerSum(0);

        for (int i = 0; i < batchIterable.getBatchCount(7); ++i)
        {
            batchIterable.batchForEach(each -> sum.add(each == null ? 1 : each), i, batchIterable.getBatchCount(7));
        }
        Assert.assertEquals(expectedValue, sum.getValue());
    }

    private void batchForEachEmptyBatchIterable(BatchIterable<Integer> batchIterable)
    {
        //Test batchForEach on empty set, it should simply do nothing and not throw any exceptions
        Sum sum = new IntegerSum(0);
        batchIterable.batchForEach(new SumProcedure<>(sum), 0, batchIterable.getBatchCount(1));
        Assert.assertEquals(0, sum.getValue());
    }

    @Test
    public void batchIterable_forEach()
    {
        UnifiedMap<String, Integer> map = UnifiedMap.<String, Integer>newMap(5).withKeysValues("1", 1, "2", 2, "3", 3, "4", 4);
        this.batchIterable_forEach(map, 10);

        UnifiedMap<Integer, Integer> collisions = UnifiedMap.<Integer, Integer>newMap(5).withKeysValues(COLLISION_1, 1, COLLISION_2, 2, COLLISION_3, 3, 1, 4).withKeysValues(2, 5, 3, 6);
        this.batchIterable_forEach(collisions, 21);

        UnifiedMap<Integer, Integer> nulls = UnifiedMap.<Integer, Integer>newMap(100).withKeysValues(null, 10, 1, null, 2, 11, 3, 12).withKeysValues(4, null, 5, null);
        this.batchIterable_forEachNullHandling(nulls, 33);

        this.batchIterable_forEachEmptyBatchIterable(UnifiedMap.<Integer, Integer>newMap());
    }

    @Test
    public void batchIterable_forEachKey()
    {
        Set<Integer> keys = UnifiedMap.<Integer, String>newMap(5).withKeysValues(1, "1", 2, "2", 3, "3", 4, "4").keySet();
        this.batchIterable_forEach((BatchIterable<Integer>) keys, 10);

        Set<Integer> collisions = UnifiedMap.<Integer, Integer>newMap(5).withKeysValues(COLLISION_1, 1, COLLISION_2, 2, COLLISION_3, 3, 1, 4).withKeysValues(2, 5, 3, 6).keySet();
        this.batchIterable_forEach((BatchIterable<Integer>) collisions, 57);

        Set<Integer> nulls = UnifiedMap.<Integer, Integer>newMap(100).withKeysValues(null, 10, 1, null, 2, 11, 3, 12).withKeysValues(4, null, 5, null).keySet();
        this.batchIterable_forEachNullHandling((BatchIterable<Integer>) nulls, 15);

        this.batchIterable_forEachEmptyBatchIterable((BatchIterable<Integer>) UnifiedMap.<Integer, Integer>newMap().keySet());
    }

    @Test
    public void batchIterable_forEachValue()
    {
        Collection<Integer> values = UnifiedMap.<String, Integer>newMap(5).withKeysValues("1", 1, "2", 2, "3", 3, "4", 4).values();
        this.batchIterable_forEach((BatchIterable<Integer>) values, 10);

        Collection<Integer> collisions = UnifiedMap.<Integer, Integer>newMap(5).withKeysValues(COLLISION_1, 1, COLLISION_2, 2, COLLISION_3, 3, 1, 4).withKeysValues(2, 5, 3, 6).values();
        this.batchIterable_forEach((BatchIterable<Integer>) collisions, 21);

        Collection<Integer> nulls = UnifiedMap.<Integer, Integer>newMap(100).withKeysValues(null, 10, 1, null, 2, 11, 3, 12).withKeysValues(4, null, 5, null).values();
        this.batchIterable_forEachNullHandling((BatchIterable<Integer>) nulls, 33);

        this.batchIterable_forEachEmptyBatchIterable((BatchIterable<Integer>) UnifiedMap.<Integer, Integer>newMap().values());
    }

    @Test
    public void batchIterable_forEachEntry()
    {
        BatchIterable<Map.Entry<Integer, Integer>> entries =
                (BatchIterable<Map.Entry<Integer, Integer>>) UnifiedMap.newWithKeysValues(1, 1, 2, 2, 3, 3, 4, 4).entrySet();
        Sum sum = new IntegerSum(0);
        entries.forEach(new EntrySumProcedure(sum));
        Assert.assertEquals(20, sum.getValue());
    }

    @Test
    public void batchIterable_forEachEntry_chains()
    {
        BatchIterable<Map.Entry<Integer, Integer>> collisions =
                (BatchIterable<Map.Entry<Integer, Integer>>) UnifiedMap.<Integer, Integer>newMap(5).withKeysValues(
                        COLLISION_1, 1, COLLISION_2, 2, COLLISION_3, 3, 1, 4).withKeysValues(2, 5, 3, 6).entrySet();

        Sum sum = new IntegerSum(0);
        collisions.forEach(new EntrySumProcedure(sum));
        Assert.assertEquals(78, sum.getValue());
    }

    @Test
    public void batchIterable_forEachEntry_null_handling()
    {
        //Testing batchForEach handling null keys and null values
        Sum sum = new IntegerSum(0);
        BatchIterable<Map.Entry<Integer, Integer>> nulls =
                (BatchIterable<Map.Entry<Integer, Integer>>) UnifiedMap.<Integer, Integer>newMap(100).withKeysValues(
                        null, 10, 1, null, 2, 11, 3, 12).withKeysValues(4, null, 5, null).entrySet();

        nulls.forEach(each -> {
            sum.add(each.getKey() == null ? 0 : each.getKey());
            sum.add(each.getValue() == null ? 0 : each.getValue());
        });

        Assert.assertEquals(48, sum.getValue());
    }

    @Test
    public void batchIterable_forEachEntry_emptySet()
    {
        //Test forEach on empty set, it should simply do nothing and not throw any exceptions
        Sum sum = new IntegerSum(0);
        BatchIterable<Map.Entry<Integer, Integer>> empty =
                (BatchIterable<Map.Entry<Integer, Integer>>) UnifiedMap.newMap().entrySet();
        empty.forEach(new EntrySumProcedure(sum));
        Assert.assertEquals(0, sum.getValue());
    }

    private void batchIterable_forEach(BatchIterable<Integer> batchIterable, int expectedValue)
    {
        IntegerSum sum = new IntegerSum(0);
        batchIterable.forEach(new SumProcedure<>(sum));
        Assert.assertEquals(expectedValue, sum.getValue());
    }

    private void batchIterable_forEachNullHandling(BatchIterable<Integer> batchIterable, int expectedValue)
    {
        //Testing forEach handling null keys and null values
        Sum sum = new IntegerSum(0);
        batchIterable.forEach(each -> sum.add(each == null ? 0 : each));
        Assert.assertEquals(expectedValue, sum.getValue());
    }

    private void batchIterable_forEachEmptyBatchIterable(BatchIterable<Integer> batchIterable)
    {
        //Test forEach on empty set, it should simply do nothing and not throw any exceptions
        Sum sum = new IntegerSum(0);
        batchIterable.batchForEach(new SumProcedure<>(sum), 0, batchIterable.getBatchCount(1));
        Assert.assertEquals(0, sum.getValue());
    }

    @Test
    public void getMapMemoryUsedInWords()
    {
        UnifiedMap<String, String> map = UnifiedMap.newMap();
        Assert.assertEquals(34, map.getMapMemoryUsedInWords());
        map.put("1", "1");
        Assert.assertEquals(34, map.getMapMemoryUsedInWords());

        UnifiedMap<Integer, Integer> map2 = this.mapWithCollisionsOfSize(2);
        Assert.assertEquals(16, map2.getMapMemoryUsedInWords());
    }

    @Test
    public void getCollidingBuckets()
    {
        UnifiedMap<Object, Object> map = UnifiedMap.newMap();
        Assert.assertEquals(0, map.getCollidingBuckets());

        UnifiedMap<Integer, Integer> map2 = this.mapWithCollisionsOfSize(2);
        Assert.assertEquals(1, map2.getCollidingBuckets());

        map2.put(42, 42);
        Assert.assertEquals(1, map2.getCollidingBuckets());

        UnifiedMap<String, String> map3 = UnifiedMap.newWithKeysValues("Six", "6", "Bar", "-", "Three", "3", "Five", "5");
        Assert.assertEquals(2, map3.getCollidingBuckets());
    }

    @Override
    @Test
    public void getIfAbsentPut()
    {
        super.getIfAbsentPut();

        // this map is deliberately small to force a rehash to occur from the put method, in a map with a chained bucket
        UnifiedMap<Integer, Integer> map = UnifiedMap.newMap(2, 0.75f);
        COLLISIONS.subList(0, 5).forEach(Procedures.cast(each -> map.getIfAbsentPut(each, new PassThruFunction0<>(each))));

        Assert.assertEquals(this.mapWithCollisionsOfSize(5), map);

        //Test getting element present in chain
        UnifiedMap<Integer, Integer> map2 = UnifiedMap.newWithKeysValues(COLLISION_1, 1, COLLISION_2, 2, COLLISION_3, 3, COLLISION_4, 4);
        Assert.assertEquals(Integer.valueOf(3), map2.getIfAbsentPut(COLLISION_3, () -> {
            Assert.fail();
            return null;
        }));

        //Test rehashing while creating a new chained key
        UnifiedMap<Integer, Integer> map3 = UnifiedMap.<Integer, Integer>newMap(2, 0.75f).withKeysValues(1, COLLISION_1, 2, COLLISION_2, 3, COLLISION_3);
        Assert.assertEquals(COLLISION_4, map3.getIfAbsentPut(4, new PassThruFunction0<>(COLLISION_4)));
        Assert.assertNull(map3.getIfAbsentPut(5, new PassThruFunction0<>(null)));
    }

    @Override
    @Test
    public void getIfAbsentPut_block_throws()
    {
        super.getIfAbsentPut_block_throws();

        // this map is deliberately small to force a rehash to occur from the put method, in a map with a chained bucket
        UnifiedMap<Integer, Integer> map = UnifiedMap.newMap(2, 0.75f);
        COLLISIONS.subList(0, 5).forEach(Procedures.cast(each -> {
            Verify.assertThrows(RuntimeException.class, () -> map.getIfAbsentPut(each, () -> {
                throw new RuntimeException();
            }));
            map.put(each, each);
        }));

        Assert.assertEquals(this.mapWithCollisionsOfSize(5), map);
    }

    @Override
    @Test
    public void put()
    {
        super.put();

        // this map is deliberately small to force a rehash to occur from the put method, in a map with a chained bucket
        UnifiedMap<Integer, Integer> map = UnifiedMap.newMap(2, 0.75f);
        COLLISIONS.subList(0, 5).forEach(Procedures.cast(each -> Assert.assertNull(map.put(each, each))));

        Assert.assertEquals(this.mapWithCollisionsOfSize(5), map);
    }

    @Override
    @Test
    public void collectValues()
    {
        super.collectValues();

        UnifiedMap<String, Integer> map = UnifiedMap.<String, Integer>newMap().withKeysValues("1", 1, "2", 2, "3", 3, "4", 4);
        Assert.assertEquals(
                UnifiedMap.<String, String>newMap(5).withKeysValues("1", "11", "2", "22", "3", "33", "4", "44"),
                map.collectValues((key, value) -> key + value));

        UnifiedMap<Integer, Integer> collisions = UnifiedMap.<Integer, Integer>newMap().withKeysValues(COLLISION_1, 1, COLLISION_2, 2, COLLISION_3, 3, 1, 4);
        Assert.assertEquals(
                UnifiedMap.<Integer, Integer>newMap().withKeysValues(COLLISION_1, COLLISION_1 + 1, COLLISION_2, COLLISION_2 + 2, COLLISION_3, COLLISION_3 + 3, 1, 5),
                collisions.collectValues((key, value) -> key + value));

        UnifiedMap<Integer, Integer> nulls = UnifiedMap.<Integer, Integer>newMap().withKeysValues(null, 10, 1, null, 2, 11, 3, 12);
        Assert.assertEquals(
                UnifiedMap.<Integer, Boolean>newMap().withKeysValues(null, true, 1, true, 2, false, 3, false),
                nulls.collectValues((key, value) -> key == null || value == null));

        UnifiedMap<Integer, Integer> empty = UnifiedMap.newMap();
        Verify.assertEmpty(empty.collectValues((key, value) -> key + value));
    }

    @Override
    @Test
    public void detect()
    {
        super.detect();

        UnifiedMap<Integer, String> collisions = UnifiedMap.<Integer, String>newMap().withKeysValues(COLLISION_1, "one", COLLISION_2, "two", COLLISION_3, "three");
        Assert.assertNull(collisions.detect((key, value) -> COLLISION_4.equals(key) && "four".equals(value)));
        Assert.assertEquals(
                Tuples.pair(COLLISION_1, "one"),
                collisions.detect((key, value) -> COLLISION_1.equals(key) && "one".equals(value)));
    }

    @Override
    @Test
    public void detectOptional()
    {
        super.detectOptional();

        UnifiedMap<Integer, String> collisions = UnifiedMap.<Integer, String>newMap().withKeysValues(COLLISION_1, "one", COLLISION_2, "two", COLLISION_3, "three");
        Assert.assertFalse(collisions.detectOptional((key, value) -> COLLISION_4.equals(key) && "four".equals(value)).isPresent());
        Assert.assertEquals(
                Tuples.pair(COLLISION_1, "one"),
                collisions.detectOptional((key, value) -> COLLISION_1.equals(key) && "one".equals(value)).get());
    }

    @Override
    @Test
    public void detect_value()
    {
        super.detect_value();

        UnifiedMap<Integer, String> collisions = UnifiedMap.<Integer, String>newMap().withKeysValues(COLLISION_1, "one", COLLISION_2, "two", COLLISION_3, "three");
        Assert.assertNull(collisions.detect("four"::equals));
        Assert.assertEquals("one", collisions.detect("one"::equals));
    }

    @Override
    @Test
    public void detectOptional_value()
    {
        super.detectOptional_value();

        UnifiedMap<Integer, String> collisions = UnifiedMap.<Integer, String>newMap().withKeysValues(COLLISION_1, "one", COLLISION_2, "two", COLLISION_3, "three");
        Assert.assertFalse(collisions.detectOptional("four"::equals).isPresent());
        Assert.assertEquals("one", collisions.detectOptional("one"::equals).get());
    }

    @Override
    @Test
    public void detectWith()
    {
        super.detectWith();

        UnifiedMap<Integer, String> collisions = UnifiedMap.<Integer, String>newMap().withKeysValues(COLLISION_1, "one", COLLISION_2, "two", COLLISION_3, "three");
        Assert.assertNull(
                collisions.detectWith(
                        (String value, String parameter) -> "value is four".equals(parameter + value),
                        "value is "));
        Assert.assertEquals(
                "one",
                collisions.detectWith(
                        (String value, String parameter) -> "value is one".equals(parameter + value),
                        "value is "));
    }

    @Override
    @Test
    public void detectWithOptional()
    {
        super.detectWithOptional();

        UnifiedMap<Integer, String> collisions = UnifiedMap.<Integer, String>newMap().withKeysValues(COLLISION_1, "one", COLLISION_2, "two", COLLISION_3, "three");
        Assert.assertFalse(
                collisions.detectWithOptional(
                        (String value, String parameter) -> "value is four".equals(parameter + value),
                        "value is ").isPresent());
        Assert.assertEquals(
                "one",
                collisions.detectWithOptional(
                        (String value, String parameter) -> "value is one".equals(parameter + value),
                        "value is ").get());
    }

    @Override
    @Test
    public void detectIfNone_value()
    {
        super.detectIfNone_value();

        UnifiedMap<Integer, String> collisions = UnifiedMap.<Integer, String>newMap().withKeysValues(COLLISION_1, "one", COLLISION_2, "two", COLLISION_3, "three");
        Assert.assertEquals(
                "if none string",
                collisions.detectIfNone(
                        "four"::equals,
                        () -> "if none string"));
        Assert.assertEquals(
                "one",
                collisions.detectIfNone(
                        "one"::equals,
                        () -> "if none string"));
    }

    @Override
    @Test
    public void detectWithIfNone()
    {
        super.detectWithIfNone();

        UnifiedMap<Integer, String> collisions = UnifiedMap.<Integer, String>newMap().withKeysValues(COLLISION_1, "one", COLLISION_2, "two", COLLISION_3, "three");
        Assert.assertEquals(
                "if none string",
                collisions.detectWithIfNone(
                        (String value, String parameter) -> "value is four".equals(parameter + value),
                        "value is ",
                        () -> "if none string"));
        Assert.assertEquals(
                "one",
                collisions.detectWithIfNone(
                        (String value, String parameter) -> "value is one".equals(parameter + value),
                        "value is ",
                        () -> "if none string"));
    }

    @Override
    @Test
    public void anySatisfy()
    {
        super.anySatisfy();

        UnifiedMap<Integer, String> collisions = UnifiedMap.<Integer, String>newMap().withKeysValues(COLLISION_1, "one", COLLISION_2, "two", COLLISION_3, "three");
        Assert.assertFalse(collisions.anySatisfy("four"::equals));
        Assert.assertTrue(collisions.anySatisfy("one"::equals));
    }

    @Override
    @Test
    public void anySatisfyWith()
    {
        super.anySatisfyWith();

        UnifiedMap<Integer, String> collisions = UnifiedMap.<Integer, String>newMap().withKeysValues(COLLISION_1, "one", COLLISION_2, "two", COLLISION_3, "three");
        Assert.assertTrue(
                collisions.anySatisfyWith(
                        (value, parameter) -> "value is one".equals(parameter + value),
                        "value is "));
        Assert.assertFalse(
                collisions.anySatisfyWith(
                        (value, parameter) -> "value is four".equals(parameter + value),
                        "value is "));
    }

    @Override
    @Test
    public void allSatisfy()
    {
        super.allSatisfy();

        UnifiedMap<Integer, String> collisions = UnifiedMap.<Integer, String>newMap().withKeysValues(COLLISION_1, "one", COLLISION_2, "two", COLLISION_3, "three");
        Assert.assertTrue(collisions.allSatisfy(value -> !value.isEmpty()));
        Assert.assertFalse(collisions.allSatisfy(value -> value.length() > 3));
    }

    @Override
    @Test
    public void allSatisfyWith()
    {
        super.allSatisfyWith();

        UnifiedMap<Integer, String> collisions = UnifiedMap.<Integer, String>newMap().withKeysValues(COLLISION_1, "one", COLLISION_2, "two", COLLISION_3, "three");
        Assert.assertTrue(collisions.allSatisfyWith(Predicates2.instanceOf(), String.class));
        Assert.assertFalse(collisions.allSatisfyWith(String::equals, "one"));
    }

    @Override
    @Test
    public void noneSatisfy()
    {
        super.allSatisfy();

        UnifiedMap<Integer, String> collisions = UnifiedMap.<Integer, String>newMap().withKeysValues(COLLISION_1, "one", COLLISION_2, "two", COLLISION_3, "three");
        Assert.assertTrue(collisions.noneSatisfy("four"::equals));
        Assert.assertFalse(collisions.noneSatisfy("one"::equals));
    }

    @Override
    @Test
    public void noneSatisfyWith()
    {
        super.allSatisfyWith();

        UnifiedMap<Integer, String> collisions = UnifiedMap.<Integer, String>newMap().withKeysValues(COLLISION_1, "one", COLLISION_2, "two", COLLISION_3, "three");
        Assert.assertTrue(collisions.noneSatisfyWith(String::equals, "monkey"));
        Assert.assertFalse(collisions.allSatisfyWith(String::equals, "one"));
    }

    @Test
    public void trimToSize()
    {
        UnifiedMap<String, String> map = UnifiedMap.newMap();
        MutableMap<String, String> expected = Maps.mutable.empty();

        Interval integers = Interval.fromTo(0, 250);
        integers.each(each ->
        {
            map.put(each.toString(), each.toString());
            expected.put(each.toString(), each.toString());
        });
        ArrayIterate.forEach(FREQUENT_COLLISIONS, each ->
        {
            map.put(each, each);
            expected.put(each, each);
        });

        Assert.assertEquals(expected, map);
        Assert.assertEquals(261, map.size());

        MutableList<Integer> toRemove = Lists.mutable.withAll(Interval.evensFromTo(0, 20));

        toRemove.addAll(Interval.oddsFromTo(35, 55));
        toRemove.each(each ->
        {
            map.remove(each.toString());
            expected.remove(each.toString());
        });

        // First assertion to verify that trim does not happen since, the table is already at the smallest required power of 2.
        Assert.assertFalse(map.trimToSize());
        Assert.assertEquals(expected, map);
        Assert.assertEquals(239, map.size());

        Interval.evensFromTo(0, 250).each(each ->
        {
            map.remove(each.toString());
            expected.remove(each.toString());
        });

        // Second assertion to verify that trim happens since, the table length is less than smallest required power of 2.
        Assert.assertTrue(map.trimToSize());
        Assert.assertFalse(map.trimToSize());
        Assert.assertEquals(expected, map);
        Assert.assertEquals(124, map.size());
        expected.forEachKey(each -> Assert.assertEquals(each, map.get(each)));

        integers.each(each ->
        {
            map.remove(each.toString());
            expected.remove(each.toString());
        });
        Assert.assertTrue(map.trimToSize());
        Assert.assertFalse(map.trimToSize());
        Assert.assertEquals(expected, map);
        expected.forEachKey(each -> Assert.assertEquals(each, map.get(each)));

        map.clear();
        expected.clear();
        Assert.assertTrue(map.trimToSize());

        Interval.zeroTo(20).each(each ->
        {
            map.put(each.toString(), each.toString());
            expected.put(each.toString(), each.toString());
        });
        Assert.assertFalse(map.trimToSize());
        Interval.fromTo(9, 18).each(each ->
        {
            map.remove(each.toString());
            expected.remove(each.toString());
        });
        Assert.assertTrue(map.trimToSize());
        Assert.assertFalse(map.trimToSize());
        Assert.assertEquals(expected, map);
        expected.forEachKey(each -> Assert.assertEquals(each, map.get(each)));

        map.clear();
        Assert.assertTrue(map.trimToSize());
        Assert.assertTrue(map.isEmpty());
        Interval.zeroTo(6).each(each -> map.put(each.toString(), each.toString()));
        // Assert that trim does not happen as long as table.size is already as smaller than required
        Assert.assertFalse(map.trimToSize());
        map.put("7", "7");

        map.removeKey("2");
        map.removeKey("3");
        // Assert that trim does not happen as long as table.size is as smaller as required
        Assert.assertFalse(map.trimToSize());
        map.removeKey("5");
        map.removeKey("7");
        Assert.assertTrue(map.trimToSize());
        // Inflate the map so that table.length increases to next power of 2 and check that trim does not happen
        map.put("2", "2");
        map.put("5", "5");
        map.put("7", "7");
        // Assert that the resized table due to put is the required size and no need to trim that.
        Assert.assertFalse(map.trimToSize());

        Interval.zeroTo(4).each(each -> map.put(each.toString(), each.toString()));
        Interval.oneTo(3).each(each -> map.removeKey(each.toString()));
        Assert.assertTrue(map.trimToSize());
        Assert.assertEquals(5, map.size());
    }

    @Override
    protected UnifiedMap<Integer, Integer> mapWithCollisionsOfSize(int size)
    {
        UnifiedMap<Integer, Integer> map = UnifiedMap.newMap(size);
        return this.populateMapWithCollisionsOfSize(size, map);
    }

    private static final class EntrySumProcedure implements Procedure<Map.Entry<Integer, Integer>>
    {
        private static final long serialVersionUID = 1L;
        private final Sum sum;

        private EntrySumProcedure(Sum sum)
        {
            this.sum = sum;
        }

        @Override
        public void value(Map.Entry<Integer, Integer> each)
        {
            this.sum.add(each.getKey());
            this.sum.add(each.getValue());
        }
    }
}