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TapIteratorTest.java
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TapIteratorTest.java
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/*
* Copyright (c) 2022 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.lazy.iterator;
import java.util.Iterator;
import java.util.NoSuchElementException;
import java.util.concurrent.atomic.AtomicInteger;
import org.eclipse.collections.api.list.primitive.MutableIntList;
import org.eclipse.collections.impl.factory.Lists;
import org.eclipse.collections.impl.factory.primitive.IntLists;
import org.junit.Assert;
import org.junit.Test;
public class TapIteratorTest
{
@Test(expected = NoSuchElementException.class)
public void nextIfDoesntHaveAnything()
{
new TapIterator<>(Lists.immutable.of(), object -> {
}).next();
}
@Test(expected = UnsupportedOperationException.class)
public void removeIsUnsupported()
{
new TapIterator<>(Lists.immutable.of().iterator(), object -> {
}).remove();
}
@Test
public void nextAfterEmptyIterable()
{
Object expected = new Object();
Iterator<Object> iterator = new TapIterator<>(
Lists.fixedSize.of(expected), object -> { });
Assert.assertSame(expected, iterator.next());
}
@Test
public void iterator()
{
Iterator<AtomicInteger> iterator =
new TapIterator<>(
Lists.mutable.of(
new AtomicInteger(1),
new AtomicInteger(2),
new AtomicInteger(3)),
each -> each.set(each.get() * 10));
MutableIntList intList = IntLists.mutable.empty();
while (iterator.hasNext())
{
intList.add(iterator.next().get());
}
Assert.assertEquals(IntLists.mutable.of(10, 20, 30), intList);
}
}