/
IntIntervalTest.java
1191 lines (1046 loc) · 51.1 KB
/
IntIntervalTest.java
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/*
* Copyright (c) 2019 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.list.primitive;
import java.util.NoSuchElementException;
import java.util.stream.Collectors;
import org.eclipse.collections.api.IntIterable;
import org.eclipse.collections.api.LazyIntIterable;
import org.eclipse.collections.api.RichIterable;
import org.eclipse.collections.api.block.procedure.primitive.IntProcedure;
import org.eclipse.collections.api.iterator.IntIterator;
import org.eclipse.collections.api.list.ImmutableList;
import org.eclipse.collections.api.list.MutableList;
import org.eclipse.collections.api.list.primitive.ImmutableIntList;
import org.eclipse.collections.api.list.primitive.MutableIntList;
import org.eclipse.collections.api.tuple.primitive.IntIntPair;
import org.eclipse.collections.api.tuple.primitive.IntObjectPair;
import org.eclipse.collections.impl.ThrowingAppendable;
import org.eclipse.collections.impl.bag.mutable.primitive.IntHashBag;
import org.eclipse.collections.impl.block.factory.primitive.IntPredicates;
import org.eclipse.collections.impl.factory.Lists;
import org.eclipse.collections.impl.factory.primitive.BooleanLists;
import org.eclipse.collections.impl.factory.primitive.ByteLists;
import org.eclipse.collections.impl.factory.primitive.CharLists;
import org.eclipse.collections.impl.factory.primitive.DoubleLists;
import org.eclipse.collections.impl.factory.primitive.FloatLists;
import org.eclipse.collections.impl.factory.primitive.IntLists;
import org.eclipse.collections.impl.factory.primitive.LongLists;
import org.eclipse.collections.impl.factory.primitive.ShortLists;
import org.eclipse.collections.impl.list.mutable.FastList;
import org.eclipse.collections.impl.list.mutable.primitive.IntArrayList;
import org.eclipse.collections.impl.math.IntegerSum;
import org.eclipse.collections.impl.math.MutableInteger;
import org.eclipse.collections.impl.math.MutableLong;
import org.eclipse.collections.impl.set.mutable.primitive.IntHashSet;
import org.eclipse.collections.impl.test.Verify;
import org.eclipse.collections.impl.tuple.primitive.PrimitiveTuples;
import org.junit.Assert;
import org.junit.Test;
public class IntIntervalTest
{
private final IntInterval intInterval = IntInterval.oneTo(3);
@Test
public void fromAndToAndBy()
{
IntInterval interval = IntInterval.from(1);
IntInterval interval2 = interval.to(10);
IntInterval interval3 = interval2.by(2);
Verify.assertEqualsAndHashCode(interval, IntInterval.fromTo(1, 1));
Verify.assertEqualsAndHashCode(interval2, IntInterval.fromTo(1, 10));
Verify.assertEqualsAndHashCode(interval3, IntInterval.fromToBy(1, 10, 2));
Verify.assertSize(Integer.MAX_VALUE, IntInterval.fromTo(Integer.MIN_VALUE + 1, -1));
Verify.assertSize(Integer.MAX_VALUE, IntInterval.fromTo(1, Integer.MAX_VALUE));
Verify.assertThrows(IllegalArgumentException.class, () -> IntInterval.fromTo(Integer.MIN_VALUE, Integer.MAX_VALUE));
Verify.assertThrows(IllegalArgumentException.class, () -> IntInterval.fromTo(-1, Integer.MAX_VALUE));
Verify.assertThrows(IllegalArgumentException.class, () -> IntInterval.fromToBy(Integer.MIN_VALUE, Integer.MAX_VALUE, 2));
Assert.assertEquals(IntInterval.fromTo(Integer.MIN_VALUE + 1, -1).size(), IntInterval.oneTo(Integer.MAX_VALUE).size());
Assert.assertEquals(IntLists.mutable.with(0), IntInterval.fromToBy(0, 2, 3));
Assert.assertEquals(IntLists.mutable.with(0), IntInterval.fromToBy(0, -2, -3));
Assert.assertEquals(IntLists.mutable.with(1_000_000_000), IntInterval.fromToBy(1_000_000_000, 2_000_000_000, 1_500_000_000));
Assert.assertEquals(IntLists.mutable.with(-1_000_000_000), IntInterval.fromToBy(-1_000_000_000, -2_000_000_000, -1_500_000_000));
Assert.assertEquals(IntLists.mutable.with(Integer.MIN_VALUE), IntInterval.fromToBy(Integer.MIN_VALUE, Integer.MIN_VALUE + 10, 20));
Assert.assertEquals(IntLists.mutable.with(Integer.MAX_VALUE), IntInterval.fromToBy(Integer.MAX_VALUE, Integer.MAX_VALUE - 10, -20));
}
@Test(expected = IllegalArgumentException.class)
public void fromToBy_throws_step_size_zero()
{
IntInterval.fromToBy(0, 0, 0);
}
@Test(expected = IllegalArgumentException.class)
public void fromToBy_throws_on_illegal_step()
{
IntInterval.fromToBy(5, 0, 1);
}
@Test
public void fromToBy_with_same_start_and_end_with_negative_step()
{
MutableIntList integers = IntInterval.fromToBy(2, 2, -2).toList();
Verify.assertEquals(1, integers.size());
Verify.assertEquals(2, integers.getFirst());
}
@Test
public void fromToBy_with_same_start_and_end_with_negative_step2()
{
MutableIntList integers = IntInterval.fromToBy(2, 2, -1).toList();
Verify.assertEquals(1, integers.size());
Verify.assertEquals(2, integers.getFirst());
}
@Test(expected = IllegalArgumentException.class)
public void oneToBy_throws_step_size_zero()
{
IntInterval.oneToBy(1, 0);
}
@Test(expected = IllegalArgumentException.class)
public void oneToBy_throws_count_size_zero()
{
IntInterval.oneToBy(0, 1);
}
@Test(expected = IllegalArgumentException.class)
public void zeroToBy_throws_step_size_zero()
{
IntInterval.zeroToBy(0, 0);
}
@Test
public void equalsAndHashCode()
{
IntInterval interval1 = IntInterval.oneTo(5);
IntInterval interval2 = IntInterval.oneTo(5);
IntInterval interval3 = IntInterval.zeroTo(5);
Verify.assertPostSerializedEqualsAndHashCode(interval1);
Verify.assertEqualsAndHashCode(interval1, interval2);
Assert.assertNotEquals(interval1, interval3);
Assert.assertNotEquals(interval3, interval1);
Verify.assertEqualsAndHashCode(IntInterval.fromToBy(1, 5, 2), IntInterval.fromToBy(1, 6, 2));
Verify.assertEqualsAndHashCode(IntArrayList.newListWith(1, 2, 3), IntInterval.fromTo(1, 3));
Verify.assertEqualsAndHashCode(IntArrayList.newListWith(3, 2, 1), IntInterval.fromTo(3, 1));
Assert.assertNotEquals(IntArrayList.newListWith(1, 2, 3, 4), IntInterval.fromTo(1, 3));
Assert.assertNotEquals(IntArrayList.newListWith(1, 2, 4), IntInterval.fromTo(1, 3));
Assert.assertNotEquals(IntArrayList.newListWith(3, 2, 0), IntInterval.fromTo(3, 1));
Verify.assertEqualsAndHashCode(IntArrayList.newListWith(-1, -2, -3), IntInterval.fromTo(-1, -3));
Verify.assertEqualsAndHashCode(IntArrayList.newListWith(1), IntInterval.fromToBy(1, 1, 1));
Verify.assertEqualsAndHashCode(IntArrayList.newListWith(1), IntInterval.fromToBy(1, 1, 2));
Verify.assertEqualsAndHashCode(IntArrayList.newListWith(-1), IntInterval.fromToBy(-1, -1, -1));
Verify.assertEqualsAndHashCode(IntArrayList.newListWith(-1), IntInterval.fromToBy(-1, -1, -2));
IntInterval interval4 = IntInterval.fromTo(-1, -1_000);
IntInterval interval5 = IntInterval.fromTo(-1, -1_000);
IntInterval interval6 = IntInterval.fromTo(0, -999);
Verify.assertPostSerializedEqualsAndHashCode(interval4);
Verify.assertEqualsAndHashCode(interval4, interval5);
Assert.assertNotEquals(interval4, interval6);
Assert.assertNotEquals(interval6, interval4);
}
@Test
public void sumIntInterval()
{
Assert.assertEquals(15, (int) IntInterval.oneTo(5).sum());
}
@Test
public void maxIntInterval()
{
int value = IntInterval.oneTo(5).max();
Assert.assertEquals(5, value);
}
@Test
public void iterator()
{
IntIterator iterator = this.intInterval.intIterator();
Assert.assertTrue(iterator.hasNext());
Assert.assertEquals(1L, iterator.next());
Assert.assertTrue(iterator.hasNext());
Assert.assertEquals(2L, iterator.next());
Assert.assertTrue(iterator.hasNext());
Assert.assertEquals(3L, iterator.next());
Assert.assertFalse(iterator.hasNext());
}
@Test(expected = NoSuchElementException.class)
public void iterator_throws()
{
IntIterator iterator = this.intInterval.intIterator();
while (iterator.hasNext())
{
iterator.next();
}
iterator.next();
}
@Test
public void forEach()
{
long[] sum = new long[1];
this.intInterval.forEach(each -> sum[0] += each);
Assert.assertEquals(6L, sum[0]);
}
@Test
public void each()
{
MutableIntList list1 = IntLists.mutable.empty();
IntInterval interval1 = IntInterval.oneTo(5);
interval1.each(list1::add);
Assert.assertEquals(list1, interval1);
IntInterval interval2 = IntInterval.fromTo(5, 1);
MutableIntList list2 = IntLists.mutable.empty();
interval2.each(list2::add);
Assert.assertEquals(list2, interval2);
}
@Test
public void injectInto()
{
IntInterval intInterval1 = IntInterval.oneTo(3);
MutableInteger result = intInterval1.injectInto(new MutableInteger(0), MutableInteger::add);
Assert.assertEquals(new MutableInteger(6), result);
IntInterval intInterval2 = IntInterval.fromTo(3, 1);
MutableInteger result2 = intInterval2.injectInto(new MutableInteger(0), MutableInteger::add);
Assert.assertEquals(new MutableInteger(6), result2);
}
@Test
public void injectIntoWithIndex()
{
IntInterval interval1 = IntInterval.oneTo(3);
MutableInteger result1 = this.intInterval.injectIntoWithIndex(new MutableInteger(0), (object, value, index) -> object.add(value * interval1.get(index)));
Assert.assertEquals(new MutableInteger(14), result1);
IntInterval interval2 = IntInterval.fromTo(3, 1);
MutableInteger result2 = interval2.injectIntoWithIndex(new MutableInteger(0), (object, value, index) -> object.add(value * this.intInterval.get(index)));
Assert.assertEquals(new MutableInteger(10), result2);
}
@Test
public void injectIntoOnFromToBySameStartEndNegativeStepInterval()
{
IntInterval interval = IntInterval.fromToBy(2, 2, -2);
Assert.assertEquals(new MutableInteger(0), interval.injectInto(new MutableInteger(-2), MutableInteger::add));
}
@Test
public void chunk()
{
IntInterval interval1 = IntInterval.fromToBy(0, 5, 1);
MutableList<IntInterval> expected1 = Lists.mutable.with(
IntInterval.fromToBy(0, 1, 1),
IntInterval.fromToBy(2, 3, 1),
IntInterval.fromToBy(4, 5, 1));
Assert.assertEquals(expected1, interval1.chunk(2));
IntInterval interval2 = IntInterval.fromToBy(0, -5, -1);
MutableList<IntInterval> expected2 = Lists.mutable.with(
IntInterval.fromToBy(0, -1, -1),
IntInterval.fromToBy(-2, -3, -1),
IntInterval.fromToBy(-4, -5, -1));
Assert.assertEquals(expected2, interval2.chunk(2));
IntInterval interval3 = IntInterval.fromToBy(0, 6, 1);
MutableList<IntInterval> expected3 = Lists.mutable.with(
IntInterval.fromToBy(0, 1, 1),
IntInterval.fromToBy(2, 3, 1),
IntInterval.fromToBy(4, 5, 1),
IntInterval.fromToBy(6, 6, 1));
Assert.assertEquals(expected3, interval3.chunk(2));
IntInterval interval4 = IntInterval.fromToBy(0, -6, -1);
MutableList<IntInterval> expected4 = Lists.mutable.with(
IntInterval.fromToBy(0, -1, -1),
IntInterval.fromToBy(-2, -3, -1),
IntInterval.fromToBy(-4, -5, -1),
IntInterval.fromToBy(-6, -6, -1));
RichIterable<IntIterable> actual4 = interval4.chunk(2);
Assert.assertEquals(expected4, actual4);
IntInterval interval5 = IntInterval.fromToBy(0, 6, 1);
MutableList<IntInterval> expected5 = Lists.mutable.with(IntInterval.fromToBy(0, 6, 1));
Assert.assertEquals(expected5, interval5.chunk(7));
IntInterval interval6 = IntInterval.fromToBy(0, -6, -1);
MutableList<IntInterval> expected6 = Lists.mutable.with(IntInterval.fromToBy(0, -6, -1));
Assert.assertEquals(expected6, interval6.chunk(7));
IntInterval interval7 = IntInterval.fromToBy(0, 6, 1);
MutableList<IntInterval> expected7 = Lists.mutable.with(IntInterval.fromToBy(0, 6, 1));
Assert.assertEquals(expected7, interval7.chunk(8));
IntInterval interval8 = IntInterval.fromToBy(0, -6, -1);
MutableList<IntInterval> expected8 = Lists.mutable.with(IntInterval.fromToBy(0, -6, -1));
Assert.assertEquals(expected8, interval8.chunk(8));
IntInterval interval9 = IntInterval.fromToBy(0, 9, 4);
MutableList<IntIterable> expected9 = Lists.mutable.with(
IntLists.mutable.with(0, 4),
IntLists.mutable.with(8));
Assert.assertEquals(expected9, interval9.chunk(2));
IntInterval interval10 = IntInterval.fromToBy(0, -9, -4);
MutableList<IntIterable> expected10 = Lists.mutable.with(
IntLists.mutable.with(0, -4),
IntLists.mutable.with(-8));
Assert.assertEquals(expected10, interval10.chunk(2));
IntInterval interval11 = IntInterval.fromToBy(0, 5, 3);
MutableList<IntIterable> expected11 = Lists.mutable.with(IntLists.mutable.with(0, 3));
Assert.assertEquals(expected11, interval11.chunk(3));
IntInterval interval12 = IntInterval.fromToBy(0, -5, -3);
MutableList<IntIterable> expected12 = Lists.mutable.with(IntLists.mutable.with(0, -3));
Assert.assertEquals(expected12, interval12.chunk(3));
Verify.assertThrows(IllegalArgumentException.class, () -> interval12.chunk(0));
Verify.assertThrows(IllegalArgumentException.class, () -> interval12.chunk(-1));
}
@Test
public void size()
{
Verify.assertSize(3, this.intInterval);
// Positive Ranges
Verify.assertSize(10, IntInterval.zeroTo(9));
Verify.assertSize(2_000_000_000, IntInterval.oneTo(2_000_000_000));
Verify.assertSize(200_000_000, IntInterval.oneTo(2_000_000_000).by(10));
Verify.assertSize(2_000_000_000, IntInterval.fromTo(2_000_000_000, 1).by(-1));
Verify.assertSize(500_000_000, IntInterval.oneTo(2_000_000_000).by(4));
Verify.assertSize(222_222_223, IntInterval.oneTo(2_000_000_000).by(9));
Verify.assertSize(2, IntInterval.fromToBy(Integer.MAX_VALUE - 10, Integer.MAX_VALUE, 8));
// Negative Ranges
Verify.assertSize(10, IntInterval.fromTo(0, -9));
Verify.assertSize(2_000_000_000, IntInterval.fromTo(-1, -2_000_000_000));
Verify.assertSize(200_000_000, IntInterval.fromTo(-1, -2_000_000_000).by(-10));
Verify.assertSize(2_000_000_000, IntInterval.fromTo(-2_000_000_000, -1).by(1));
Verify.assertSize(500_000_000, IntInterval.fromTo(-1, -2_000_000_000).by(-4));
Verify.assertSize(222_222_223, IntInterval.fromTo(-1, -2_000_000_000).by(-9));
// Overlapping Ranges
Verify.assertSize(21, IntInterval.fromTo(10, -10));
Verify.assertSize(5, IntInterval.fromTo(10, -10).by(-5));
Verify.assertSize(5, IntInterval.fromTo(-10, 10).by(5));
Verify.assertSize(2_000_000_001, IntInterval.fromTo(1_000_000_000, -1_000_000_000));
Verify.assertSize(200_000_001, IntInterval.fromTo(1_000_000_000, -1_000_000_000).by(-10));
}
@Test
public void subList()
{
IntInterval interval = IntInterval.fromToBy(1, 10, 2);
Assert.assertEquals(IntLists.immutable.with(3, 5, 7), interval.subList(1, 4));
}
@Test
public void dotProduct()
{
IntInterval interval = IntInterval.oneTo(3);
Assert.assertEquals(14, this.intInterval.dotProduct(interval));
}
@Test(expected = IllegalArgumentException.class)
public void dotProduct_throwsOnListsOfDifferentSizes()
{
IntInterval interval = IntInterval.oneTo(4);
this.intInterval.dotProduct(interval);
}
@Test
public void empty()
{
Assert.assertTrue(this.intInterval.notEmpty());
Verify.assertNotEmpty(this.intInterval);
}
@Test
public void count()
{
Assert.assertEquals(2L, IntInterval.zeroTo(2).count(IntPredicates.greaterThan(0)));
int count = IntInterval.fromToBy(Integer.MAX_VALUE - 10, Integer.MAX_VALUE, 8).count(IntPredicates.greaterThan(0));
Assert.assertEquals(2, count);
}
@Test
public void anySatisfy()
{
Assert.assertTrue(IntInterval.fromTo(-1, 2).anySatisfy(IntPredicates.greaterThan(0)));
Assert.assertFalse(IntInterval.oneTo(2).anySatisfy(IntPredicates.equal(0)));
}
@Test
public void allSatisfy()
{
Assert.assertFalse(IntInterval.zeroTo(2).allSatisfy(IntPredicates.greaterThan(0)));
Assert.assertTrue(IntInterval.oneTo(3).allSatisfy(IntPredicates.greaterThan(0)));
}
@Test
public void noneSatisfy()
{
Assert.assertFalse(IntInterval.zeroTo(2).noneSatisfy(IntPredicates.isEven()));
Assert.assertTrue(IntInterval.evensFromTo(2, 10).noneSatisfy(IntPredicates.isOdd()));
}
@Test
public void select()
{
Verify.assertSize(3, this.intInterval.select(IntPredicates.lessThan(4)));
Verify.assertSize(2, this.intInterval.select(IntPredicates.lessThan(3)));
}
@Test
public void reject()
{
Verify.assertSize(0, this.intInterval.reject(IntPredicates.lessThan(4)));
Verify.assertSize(1, this.intInterval.reject(IntPredicates.lessThan(3)));
}
@Test
public void detectIfNone()
{
Assert.assertEquals(1L, this.intInterval.detectIfNone(IntPredicates.lessThan(4), 0));
Assert.assertEquals(0L, this.intInterval.detectIfNone(IntPredicates.greaterThan(3), 0));
}
@Test
public void collect()
{
Assert.assertEquals(FastList.newListWith(0, 1, 2), this.intInterval.collect(parameter -> parameter - 1).toList());
}
@Test
public void lazyCollectPrimitives()
{
Assert.assertEquals(BooleanLists.immutable.of(false, true, false), IntInterval.oneTo(3).asLazy().collectBoolean(e -> e % 2 == 0).toList());
Assert.assertEquals(CharLists.immutable.of((char) 2, (char) 3, (char) 4), IntInterval.oneTo(3).asLazy().collectChar(e -> (char) (e + 1)).toList());
Assert.assertEquals(ByteLists.immutable.of((byte) 2, (byte) 3, (byte) 4), IntInterval.oneTo(3).asLazy().collectByte(e -> (byte) (e + 1)).toList());
Assert.assertEquals(ShortLists.immutable.of((short) 2, (short) 3, (short) 4), IntInterval.oneTo(3).asLazy().collectShort(e -> (short) (e + 1)).toList());
Assert.assertEquals(IntLists.immutable.of(2, 3, 4), IntInterval.oneTo(3).asLazy().collectInt(e -> e + 1).toList());
Assert.assertEquals(FloatLists.immutable.of(2.0f, 3.0f, 4.0f), IntInterval.oneTo(3).asLazy().collectFloat(e -> (float) (e + 1)).toList());
Assert.assertEquals(LongLists.immutable.of(2L, 3L, 4L), IntInterval.oneTo(3).asLazy().collectLong(e -> (long) (e + 1)).toList());
Assert.assertEquals(DoubleLists.immutable.of(2.0, 3.0, 4.0), IntInterval.oneTo(3).asLazy().collectDouble(e -> (double) (e + 1)).toList());
}
@Test
public void binarySearch()
{
IntInterval interval1 = IntInterval.oneTo(3);
Assert.assertEquals(-1, interval1.binarySearch(-1));
Assert.assertEquals(-1, interval1.binarySearch(0));
Assert.assertEquals(0, interval1.binarySearch(1));
Assert.assertEquals(1, interval1.binarySearch(2));
Assert.assertEquals(2, interval1.binarySearch(3));
Assert.assertEquals(-4, interval1.binarySearch(4));
Assert.assertEquals(-4, interval1.binarySearch(5));
IntInterval interval2 = IntInterval.fromTo(7, 17).by(3);
Assert.assertEquals(0, interval2.binarySearch(7));
Assert.assertEquals(1, interval2.binarySearch(10));
Assert.assertEquals(2, interval2.binarySearch(13));
Assert.assertEquals(3, interval2.binarySearch(16));
Assert.assertEquals(-1, interval2.binarySearch(6));
Assert.assertEquals(-2, interval2.binarySearch(8));
Assert.assertEquals(-2, interval2.binarySearch(9));
Assert.assertEquals(-3, interval2.binarySearch(12));
Assert.assertEquals(-4, interval2.binarySearch(15));
Assert.assertEquals(-5, interval2.binarySearch(17));
Assert.assertEquals(-5, interval2.binarySearch(19));
IntInterval interval3 = IntInterval.fromTo(-21, -11).by(5);
Assert.assertEquals(-1, interval3.binarySearch(-22));
Assert.assertEquals(0, interval3.binarySearch(-21));
Assert.assertEquals(-2, interval3.binarySearch(-17));
Assert.assertEquals(1, interval3.binarySearch(-16));
Assert.assertEquals(-3, interval3.binarySearch(-15));
Assert.assertEquals(2, interval3.binarySearch(-11));
Assert.assertEquals(-4, interval3.binarySearch(-9));
IntInterval interval4 = IntInterval.fromTo(50, 30).by(-10);
Assert.assertEquals(-1, interval4.binarySearch(60));
Assert.assertEquals(0, interval4.binarySearch(50));
Assert.assertEquals(-2, interval4.binarySearch(45));
Assert.assertEquals(1, interval4.binarySearch(40));
Assert.assertEquals(-3, interval4.binarySearch(35));
Assert.assertEquals(2, interval4.binarySearch(30));
Assert.assertEquals(-4, interval4.binarySearch(25));
IntInterval interval5 = IntInterval.fromTo(-30, -50).by(-10);
Assert.assertEquals(-1, interval5.binarySearch(-20));
Assert.assertEquals(0, interval5.binarySearch(-30));
Assert.assertEquals(-2, interval5.binarySearch(-35));
Assert.assertEquals(1, interval5.binarySearch(-40));
Assert.assertEquals(-3, interval5.binarySearch(-47));
Assert.assertEquals(2, interval5.binarySearch(-50));
Assert.assertEquals(-4, interval5.binarySearch(-65));
IntInterval interval6 = IntInterval.fromTo(27, -30).by(-9);
Assert.assertEquals(-1, interval6.binarySearch(30));
Assert.assertEquals(0, interval6.binarySearch(27));
Assert.assertEquals(-2, interval6.binarySearch(20));
Assert.assertEquals(1, interval6.binarySearch(18));
Assert.assertEquals(-3, interval6.binarySearch(15));
Assert.assertEquals(2, interval6.binarySearch(9));
Assert.assertEquals(-4, interval6.binarySearch(2));
Assert.assertEquals(3, interval6.binarySearch(0));
Assert.assertEquals(-5, interval6.binarySearch(-7));
Assert.assertEquals(4, interval6.binarySearch(-9));
Assert.assertEquals(-6, interval6.binarySearch(-12));
Assert.assertEquals(5, interval6.binarySearch(-18));
Assert.assertEquals(-7, interval6.binarySearch(-23));
Assert.assertEquals(6, interval6.binarySearch(-27));
Assert.assertEquals(-8, interval6.binarySearch(-28));
Assert.assertEquals(-8, interval6.binarySearch(-30));
IntInterval interval7 = IntInterval.fromTo(-1, 1).by(1);
Assert.assertEquals(-1, interval7.binarySearch(-2));
Assert.assertEquals(0, interval7.binarySearch(-1));
Assert.assertEquals(1, interval7.binarySearch(0));
Assert.assertEquals(2, interval7.binarySearch(1));
Assert.assertEquals(-4, interval7.binarySearch(2));
}
@Test
public void max()
{
Assert.assertEquals(9, IntInterval.oneTo(9).max());
Assert.assertEquals(5, IntInterval.fromTo(5, 1).max());
Assert.assertEquals(1, IntInterval.fromTo(-5, 1).max());
Assert.assertEquals(1, IntInterval.fromTo(1, -5).max());
}
@Test
public void min()
{
Assert.assertEquals(1, IntInterval.oneTo(9).min());
Assert.assertEquals(1, IntInterval.fromTo(5, 1).min());
Assert.assertEquals(-5, IntInterval.fromTo(-5, 1).min());
Assert.assertEquals(-5, IntInterval.fromTo(1, -5).min());
}
@Test
public void minIfEmpty()
{
Assert.assertEquals(1, IntInterval.oneTo(9).minIfEmpty(0));
}
@Test
public void maxIfEmpty()
{
Assert.assertEquals(9, IntInterval.oneTo(9).maxIfEmpty(0));
}
@Test
public void sum()
{
Assert.assertEquals(10L, IntInterval.oneTo(4).sum());
Assert.assertEquals(5L, IntInterval.oneToBy(4, 3).sum());
Assert.assertEquals(4L, IntInterval.oneToBy(4, 2).sum());
Assert.assertEquals(-10L, IntInterval.fromTo(-1, -4).sum());
Assert.assertEquals(-15L, IntInterval.fromToBy(-2, -10, -3).sum());
Assert.assertEquals(-7L, IntInterval.fromToBy(-10, 10, 3).sum());
Assert.assertEquals(
3L * ((long) Integer.MAX_VALUE * 2L - 2L) / 2L,
IntInterval.fromTo(Integer.MAX_VALUE - 2, Integer.MAX_VALUE).sum());
}
@Test
public void average()
{
Assert.assertEquals(2.5, IntInterval.oneTo(4).average(), 0.0);
Assert.assertEquals(5.0, IntInterval.oneToBy(9, 2).average(), 0.0);
Assert.assertEquals(5.0, IntInterval.oneToBy(10, 2).average(), 0.0);
Assert.assertEquals(-5.0, IntInterval.fromToBy(-1, -9, -2).average(), 0.0);
Assert.assertEquals((double) Integer.MAX_VALUE - 1.5,
IntInterval.fromTo(Integer.MAX_VALUE - 3, Integer.MAX_VALUE).average(), 0.0);
}
@Test
public void median()
{
Assert.assertEquals(2.5, IntInterval.oneTo(4).median(), 0.0);
Assert.assertEquals(5.0, IntInterval.oneToBy(9, 2).median(), 0.0);
Assert.assertEquals(5.0, IntInterval.oneToBy(10, 2).median(), 0.0);
Assert.assertEquals(-5.0, IntInterval.fromToBy(-1, -9, -2).median(), 0.0);
Assert.assertEquals((double) Integer.MAX_VALUE - 1.5,
IntInterval.fromTo(Integer.MAX_VALUE - 3, Integer.MAX_VALUE).median(), 0.0);
}
@Test
public void toArray()
{
Assert.assertArrayEquals(new int[]{1, 2, 3, 4}, IntInterval.oneTo(4).toArray());
}
@Test
public void toList()
{
Assert.assertEquals(IntArrayList.newListWith(1, 2, 3, 4), IntInterval.oneTo(4).toList());
}
@Test
public void toSortedList()
{
Assert.assertEquals(IntArrayList.newListWith(1, 2, 3, 4), IntInterval.oneTo(4).toReversed().toSortedList());
}
@Test
public void toSet()
{
Assert.assertEquals(IntHashSet.newSetWith(1, 2, 3, 4), IntInterval.oneTo(4).toSet());
}
@Test
public void toBag()
{
Assert.assertEquals(IntHashBag.newBagWith(1, 2, 3, 4), IntInterval.oneTo(4).toBag());
}
@Test
public void asLazy()
{
Assert.assertEquals(IntInterval.oneTo(5).toSet(), IntInterval.oneTo(5).asLazy().toSet());
Verify.assertInstanceOf(LazyIntIterable.class, IntInterval.oneTo(5).asLazy());
}
@Test
public void toSortedArray()
{
Assert.assertArrayEquals(new int[]{1, 2, 3, 4}, IntInterval.fromTo(4, 1).toSortedArray());
}
@Test
public void testEquals()
{
IntInterval list1 = IntInterval.oneTo(4);
IntInterval list2 = IntInterval.oneTo(4);
IntInterval list3 = IntInterval.fromTo(4, 1);
IntInterval list4 = IntInterval.fromTo(5, 8);
IntInterval list5 = IntInterval.fromTo(5, 7);
Verify.assertEqualsAndHashCode(list1, list2);
Verify.assertPostSerializedEqualsAndHashCode(list1);
Assert.assertNotEquals(list1, list3);
Assert.assertNotEquals(list1, list4);
Assert.assertNotEquals(list1, list5);
}
@Test
public void testHashCode()
{
Assert.assertEquals(FastList.newListWith(1, 2, 3).hashCode(), IntInterval.oneTo(3).hashCode());
}
@Test
public void testToString()
{
Assert.assertEquals("[1, 2, 3]", this.intInterval.toString());
}
@Test
public void makeString()
{
Assert.assertEquals("1, 2, 3", this.intInterval.makeString());
Assert.assertEquals("1/2/3", this.intInterval.makeString("/"));
Assert.assertEquals(this.intInterval.toString(), this.intInterval.makeString("[", ", ", "]"));
}
@Test
public void appendString()
{
StringBuilder appendable2 = new StringBuilder();
this.intInterval.appendString(appendable2);
Assert.assertEquals("1, 2, 3", appendable2.toString());
StringBuilder appendable3 = new StringBuilder();
this.intInterval.appendString(appendable3, "/");
Assert.assertEquals("1/2/3", appendable3.toString());
StringBuilder appendable4 = new StringBuilder();
this.intInterval.appendString(appendable4, "[", ", ", "]");
Assert.assertEquals(this.intInterval.toString(), appendable4.toString());
}
@Test
public void appendStringThrows()
{
Verify.assertThrows(
RuntimeException.class,
() -> this.intInterval.appendString(new ThrowingAppendable()));
Verify.assertThrows(
RuntimeException.class,
() -> this.intInterval
.appendString(new ThrowingAppendable(), ", "));
Verify.assertThrows(
RuntimeException.class,
() -> this.intInterval
.appendString(new ThrowingAppendable(), "[", ", ", "]"));
}
@Test
public void toReversed()
{
IntInterval forward = IntInterval.oneTo(5);
IntInterval reverse = forward.toReversed();
Assert.assertEquals(IntArrayList.newListWith(5, 4, 3, 2, 1), reverse);
}
@Test
public void evens()
{
IntInterval interval = IntInterval.evensFromTo(0, 10);
int[] evens = {0, 2, 4, 6, 8, 10};
int[] odds = {1, 3, 5, 7, 9};
this.assertIntIntervalContainsAll(interval, evens);
this.denyIntIntervalContainsAny(interval, odds);
Assert.assertEquals(6, interval.size());
IntInterval reverseIntInterval = IntInterval.evensFromTo(10, 0);
this.assertIntIntervalContainsAll(reverseIntInterval, evens);
this.denyIntIntervalContainsAny(reverseIntInterval, odds);
Assert.assertEquals(6, reverseIntInterval.size());
IntInterval negativeIntInterval = IntInterval.evensFromTo(-5, 5);
int[] negativeEvens = {-4, -2, 0, 2, 4};
int[] negativeOdds = {-3, -1, 1, 3};
this.assertIntIntervalContainsAll(negativeIntInterval, negativeEvens);
this.denyIntIntervalContainsAny(negativeIntInterval, negativeOdds);
Assert.assertEquals(5, negativeIntInterval.size());
IntInterval reverseNegativeIntInterval = IntInterval.evensFromTo(5, -5);
this.assertIntIntervalContainsAll(reverseNegativeIntInterval, negativeEvens);
this.denyIntIntervalContainsAny(reverseNegativeIntInterval, negativeOdds);
Assert.assertEquals(5, reverseNegativeIntInterval.size());
}
private void assertIntIntervalContainsAll(IntInterval interval, int[] expectedValues)
{
for (int value : expectedValues)
{
Assert.assertTrue(interval.contains(value));
}
}
private void denyIntIntervalContainsAny(IntInterval interval, int[] expectedValues)
{
for (int value : expectedValues)
{
Assert.assertFalse(interval.contains(value));
}
}
@Test
public void odds()
{
IntInterval interval1 = IntInterval.oddsFromTo(0, 10);
Assert.assertTrue(interval1.containsAll(1, 3, 5, 7, 9));
Assert.assertTrue(interval1.containsNone(2, 4, 6, 8));
Assert.assertEquals(5, interval1.size());
IntInterval reverseIntInterval1 = IntInterval.oddsFromTo(10, 0);
Assert.assertTrue(reverseIntInterval1.containsAll(1, 3, 5, 7, 9));
Assert.assertTrue(reverseIntInterval1.containsNone(0, 2, 4, 6, 8, 10));
Assert.assertEquals(5, reverseIntInterval1.size());
IntInterval interval2 = IntInterval.oddsFromTo(-5, 5);
Assert.assertTrue(interval2.containsAll(-5, -3, -1, 1, 3, 5));
Assert.assertTrue(interval2.containsNone(-4, -2, 0, 2, 4));
Assert.assertEquals(6, interval2.size());
IntInterval reverseIntInterval2 = IntInterval.oddsFromTo(5, -5);
Assert.assertTrue(reverseIntInterval2.containsAll(-5, -3, -1, 1, 3, 5));
Assert.assertTrue(reverseIntInterval2.containsNone(-4, -2, 0, 2, 4));
Assert.assertEquals(6, reverseIntInterval2.size());
}
@Test
public void intervalSize()
{
Assert.assertEquals(100, IntInterval.fromTo(1, 100).size());
Assert.assertEquals(50, IntInterval.fromToBy(1, 100, 2).size());
Assert.assertEquals(34, IntInterval.fromToBy(1, 100, 3).size());
Assert.assertEquals(25, IntInterval.fromToBy(1, 100, 4).size());
Assert.assertEquals(20, IntInterval.fromToBy(1, 100, 5).size());
Assert.assertEquals(17, IntInterval.fromToBy(1, 100, 6).size());
Assert.assertEquals(15, IntInterval.fromToBy(1, 100, 7).size());
Assert.assertEquals(13, IntInterval.fromToBy(1, 100, 8).size());
Assert.assertEquals(12, IntInterval.fromToBy(1, 100, 9).size());
Assert.assertEquals(10, IntInterval.fromToBy(1, 100, 10).size());
Assert.assertEquals(11, IntInterval.fromTo(0, 10).size());
Assert.assertEquals(1, IntInterval.zero().size());
Assert.assertEquals(11, IntInterval.fromTo(0, -10).size());
Assert.assertEquals(3, IntInterval.evensFromTo(2, -2).size());
Assert.assertEquals(2, IntInterval.oddsFromTo(2, -2).size());
Assert.assertEquals(1, IntInterval.fromToBy(1_000_000_000, 2_000_000_000, 1_500_000_000).size());
Assert.assertEquals(1, IntInterval.fromToBy(-1_000_000_000, -2_000_000_000, -1_500_000_000).size());
}
@Test
public void contains()
{
Assert.assertTrue(IntInterval.zero().contains(0));
Assert.assertTrue(IntInterval.oneTo(5).containsAll(1, 5));
Assert.assertTrue(IntInterval.oneTo(5).containsNone(6, 7));
Assert.assertFalse(IntInterval.oneTo(5).containsAll(1, 6));
Assert.assertFalse(IntInterval.oneTo(5).containsNone(1, 6));
Assert.assertFalse(IntInterval.oneTo(5).contains(0));
Assert.assertTrue(IntInterval.fromTo(-1, -5).containsAll(-1, -5));
Assert.assertFalse(IntInterval.fromTo(-1, -5).contains(1));
Assert.assertTrue(IntInterval.zero().contains(Integer.valueOf(0)));
Assert.assertFalse(IntInterval.oneTo(5).contains(Integer.valueOf(0)));
Assert.assertFalse(IntInterval.fromTo(-1, -5).contains(Integer.valueOf(1)));
IntInterval bigIntInterval = IntInterval.fromToBy(Integer.MIN_VALUE, Integer.MAX_VALUE, 1_000_000);
Assert.assertTrue(bigIntInterval.contains(Integer.MIN_VALUE + 1_000_000));
Assert.assertFalse(bigIntInterval.contains(Integer.MIN_VALUE + 1_000_001));
Assert.assertTrue(bigIntInterval.contains(Integer.MIN_VALUE + (1_000_000 * 10)));
Assert.assertFalse(bigIntInterval.contains(Integer.MIN_VALUE + (1_000_001 * 10)));
Assert.assertTrue(bigIntInterval.contains(Integer.MIN_VALUE + (1_000_000 * 100)));
Assert.assertFalse(bigIntInterval.contains(Integer.MIN_VALUE + (1_000_001 * 100)));
Assert.assertTrue(
IntInterval.fromToBy(1_000_000_000, 2_000_000_000, 1_500_000_000)
.contains(1_000_000_000));
Assert.assertTrue(
IntInterval.fromToBy(-1_000_000_000, -2_000_000_000, -1_500_000_000)
.contains(-1_000_000_000));
int minValue = -1_000_000_000;
int maxValue = 1_000_000_000;
IntInterval largeInterval = IntInterval.fromToBy(minValue, maxValue, 10);
Assert.assertTrue(largeInterval.containsAll(
maxValue - 10,
maxValue - 100,
maxValue - 1000,
maxValue - 10000));
Assert.assertTrue(largeInterval.contains(minValue + 10));
}
@Test
public void largeReverseUnderflowTest()
{
IntInterval reverse = IntInterval.fromToBy(Integer.MAX_VALUE, Integer.MIN_VALUE + 10, -10);
Assert.assertFalse(reverse.contains(Integer.MIN_VALUE + 10));
Assert.assertEquals(Integer.MAX_VALUE, reverse.getFirst());
int expectedLast = -2_147_483_633;
Assert.assertEquals(expectedLast, reverse.getLast());
Assert.assertTrue(reverse.contains(Integer.MAX_VALUE));
Assert.assertTrue(reverse.contains(7));
Assert.assertTrue(reverse.contains(-3));
Assert.assertTrue(reverse.contains(expectedLast));
Assert.assertTrue(reverse.contains(expectedLast + 1000));
Assert.assertEquals(214_748_364, reverse.indexOf(7));
Assert.assertEquals(214_748_365, reverse.indexOf(-3));
Assert.assertEquals(429_496_728, reverse.indexOf(expectedLast));
Assert.assertEquals(429_496_728, reverse.lastIndexOf(expectedLast));
Assert.assertEquals(429_496_728, reverse.binarySearch(expectedLast));
int expectedAtIndex300Million = -852_516_353;
Assert.assertTrue(reverse.contains(expectedAtIndex300Million));
Assert.assertEquals(300_000_000, reverse.indexOf(expectedAtIndex300Million));
Assert.assertEquals(300_000_000, reverse.lastIndexOf(expectedAtIndex300Million));
Assert.assertEquals(300_000_000, reverse.binarySearch(expectedAtIndex300Million));
int expectedAtIndex400Million = -1_852_516_353;
Assert.assertTrue(reverse.contains(expectedAtIndex400Million));
Assert.assertEquals(400_000_000, reverse.indexOf(expectedAtIndex400Million));
Assert.assertEquals(400_000_000, reverse.lastIndexOf(expectedAtIndex400Million));
Assert.assertEquals(400_000_000, reverse.binarySearch(expectedAtIndex400Million));
}
@Test
public void forwardOverflowTest()
{
int from = Integer.MAX_VALUE - 10;
int second = Integer.MAX_VALUE - 2;
long expected = (long) from + (long) second;
IntInterval interval = IntInterval.fromToBy(from, Integer.MAX_VALUE, 8);
Assert.assertEquals(2, interval.size());
Assert.assertEquals(IntLists.mutable.with(from, second), interval);
Assert.assertEquals(1, interval.count(each -> each == second));
MutableLong result = new MutableLong();
interval.forEach(result::add);
Assert.assertEquals(expected, result.longValue());
result.clear();
interval.forEachWithIndex((each, index) -> result.add(each + index));
Assert.assertEquals(expected + 1L, result.longValue());
Assert.assertEquals(expected, interval.injectInto(new MutableLong(), MutableLong::add).longValue());
Assert.assertEquals(
expected + 1L,
interval
.injectIntoWithIndex(new MutableLong(), (value, each, index) -> value.add(each + index))
.longValue());
}
@Test
public void reverseOverflowTest()
{
int from = Integer.MIN_VALUE + 10;
int second = Integer.MIN_VALUE + 2;
long expected = (long) from + (long) second;
IntInterval interval = IntInterval.fromToBy(from, Integer.MIN_VALUE, -8);
Assert.assertEquals(2, interval.size());
Assert.assertEquals(IntLists.mutable.with(from, second), interval);
Assert.assertEquals(1, interval.count(each -> each == second));
Assert.assertEquals(expected, interval.sum());
MutableLong result = new MutableLong();
interval.forEach(result::add);
Assert.assertEquals(expected, result.longValue());
result.clear();
interval.forEachWithIndex((each, index) -> result.add(each + index));
Assert.assertEquals(expected + 1L, result.longValue());
Assert.assertEquals(expected, interval.injectInto(new MutableLong(), MutableLong::add).longValue());
Assert.assertEquals(
expected + 1L,
interval
.injectIntoWithIndex(new MutableLong(), (value, each, index) -> value.add(each + index))
.longValue());
}
@Test
public void intervalIterator()
{
IntInterval zero = IntInterval.zero();
IntIterator zeroIterator = zero.intIterator();
Assert.assertTrue(zeroIterator.hasNext());
Assert.assertEquals(0, zeroIterator.next());
Assert.assertFalse(zeroIterator.hasNext());
IntInterval oneToFive = IntInterval.oneTo(5);
IntIterator oneToFiveIterator = oneToFive.intIterator();
for (int i = 1; i < 6; i++)
{
Assert.assertTrue(oneToFiveIterator.hasNext());
Assert.assertEquals(i, oneToFiveIterator.next());
}
Verify.assertThrows(NoSuchElementException.class, (Runnable) oneToFiveIterator::next);
IntInterval threeToNegativeThree = IntInterval.fromTo(3, -3);
IntIterator threeToNegativeThreeIterator = threeToNegativeThree.intIterator();
for (int i = 3; i > -4; i--)
{
Assert.assertTrue(threeToNegativeThreeIterator.hasNext());
Assert.assertEquals(i, threeToNegativeThreeIterator.next());
}
Verify.assertThrows(NoSuchElementException.class, (Runnable) threeToNegativeThreeIterator::next);
}
@Test
public void forEachWithIndex()
{
IntegerSum sum = new IntegerSum(0);
IntInterval.oneTo(5).forEachWithIndex((each, index) -> sum.add(each + index));
Assert.assertEquals(25, sum.getIntSum());
IntegerSum zeroSum = new IntegerSum(0);
IntInterval.fromTo(0, -4).forEachWithIndex((each, index) -> zeroSum.add(each + index));
Assert.assertEquals(0, zeroSum.getIntSum());
}
@Test
public void forEach_with_same_start_and_end_with_negative_step()
{
MutableInteger counter = new MutableInteger(0);
IntInterval interval = IntInterval.fromToBy(2, 2, -2);
interval.forEach((IntProcedure) each -> counter.add(1));
Assert.assertEquals(1, counter.toInteger().intValue());
}
@Test
public void getFirst()
{
Assert.assertEquals(10, IntInterval.fromTo(10, -10).by(-5).getFirst());
Assert.assertEquals(-10, IntInterval.fromTo(-10, 10).by(5).getFirst());
Assert.assertEquals(0, IntInterval.zero().getFirst());
}
@Test
public void getLast()
{
Assert.assertEquals(-10, IntInterval.fromTo(10, -10).by(-5).getLast());
Assert.assertEquals(-10, IntInterval.fromTo(10, -12).by(-5).getLast());
Assert.assertEquals(10, IntInterval.fromTo(-10, 10).by(5).getLast());
Assert.assertEquals(10, IntInterval.fromTo(-10, 12).by(5).getLast());
Assert.assertEquals(0, IntInterval.zero().getLast());
}
@Test
public void indexOf()
{
IntInterval interval = IntInterval.fromTo(-10, 12).by(5);
Assert.assertEquals(0, interval.indexOf(-10));
Assert.assertEquals(1, interval.indexOf(-5));
Assert.assertEquals(2, interval.indexOf(0));