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EmptyIteratorTest.java
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EmptyIteratorTest.java
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/*
* Copyright (c) 2021 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;
import java.util.NoSuchElementException;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
public class EmptyIteratorTest
{
private EmptyIterator<Object> emptyIterator;
@Before
public void setUp()
{
this.emptyIterator = EmptyIterator.getInstance();
}
@Test
public void hasPrevious()
{
Assert.assertFalse(this.emptyIterator.hasPrevious());
}
@Test
public void previous()
{
Assert.assertThrows(NoSuchElementException.class, this.emptyIterator::previous);
}
@Test
public void previousIndex()
{
Assert.assertEquals(-1, this.emptyIterator.previousIndex());
}
@Test
public void set()
{
Assert.assertThrows(UnsupportedOperationException.class, () -> this.emptyIterator.set(1));
}
@Test
public void add()
{
Assert.assertThrows(UnsupportedOperationException.class, () -> this.emptyIterator.add(1));
}
@Test
public void nextIndex()
{
Assert.assertEquals(0, (long) this.emptyIterator.nextIndex());
}
}