/*
* Copyright 2014 Goldman Sachs.
*
* Licensed 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.gs.collections.impl.lazy.iterator;
import java.util.Iterator;
import java.util.NoSuchElementException;
import com.gs.collections.api.list.MutableList;
import com.gs.collections.impl.factory.Lists;
import com.gs.collections.impl.list.mutable.FastList;
import com.gs.collections.impl.test.Verify;
import org.junit.Assert;
import org.junit.Test;
public class SelectInstancesOfIteratorTest
{
@Test
public void iterator()
{
MutableList<Number> list = FastList.<Number>newListWith(null, 1, 2.0, null, 3, 4.0, 5, null);
this.assertElements(new SelectInstancesOfIterator<>(list.iterator(), Integer.class));
this.assertElements(new SelectInstancesOfIterator<>(list, Integer.class));
}
private void assertElements(Iterator<Integer> iterator)
{
MutableList<Integer> result = FastList.newList();
while (iterator.hasNext())
{
result.add(iterator.next());
}
Assert.assertEquals(FastList.newListWith(1, 3, 5), result);
}
@Test
public void noSuchElementException()
{
Verify.assertThrows(NoSuchElementException.class, () -> new SelectInstancesOfIterator<>(Lists.fixedSize.of(), Object.class).next());
}
@Test
public void remove()
{
Verify.assertThrows(UnsupportedOperationException.class, () -> new SelectInstancesOfIterator<>(Lists.fixedSize.of(), Object.class).remove());
}
}