/*******************************************************************************
* Copyright 2014 Analog Devices, Inc.
*
* 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.analog.lyric.collect.tests;
import static com.analog.lyric.util.test.ExceptionTester.*;
import static org.junit.Assert.*;
import java.util.Iterator;
import org.eclipse.jdt.annotation.Nullable;
import org.junit.Test;
import com.analog.lyric.collect.ReleasableArrayIterator;
import com.analog.lyric.collect.ReleasableIterator;
import com.analog.lyric.collect.ReleasableIterators;
import com.analog.lyric.collect.SingleIterator;
import com.analog.lyric.collect.UnmodifiableReleasableIterator;
import com.analog.lyric.util.test.ExceptionTester;
public class TestReleasableIterators
{
@Test
public void testUnmodifiableReleasableIterator()
{
ReleasableIterator<?> iter = new UnmodifiableReleasableIterator<Object>() {
@Override
public void release()
{
}
@Override
public boolean hasNext()
{
return false;
}
@Override
public @Nullable Object next()
{
return null;
}
};
expectThrow(UnsupportedOperationException.class, iter, "remove");
}
@Test
public void testReleaseableArrayIterator()
{
Integer[] digits = new Integer[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
ReleasableArrayIterator<Integer> iter = ReleasableArrayIterator.create(digits);
assertNotSame(iter, ReleasableArrayIterator.create(digits));
for (int i = 0; i < 10; ++i)
{
assertTrue(iter.hasNext());
assertEquals(i, iter.next().intValue());
}
assertFalse(iter.hasNext());
ExceptionTester.expectThrow(UnsupportedOperationException.class, iter, "remove");
iter.release();
assertSame(iter, ReleasableArrayIterator.create(digits));
}
@Test
public void testEmptyIterator()
{
ReleasableIterator<String> iter = ReleasableIterators.emptyIterator();
assertFalse(iter.hasNext());
assertNull(iter.next());
expectThrow(UnsupportedOperationException.class, iter, "remove");
iter.release(); // does nothing
}
@SuppressWarnings("deprecation")
@Test
public void testSingleIterator()
{
// Note that this is not a ReleasableIterator.
Iterator<String> iter = new SingleIterator<>("foo");
assertTrue(iter.hasNext());
assertEquals("foo", iter.next());
assertFalse(iter.hasNext());
assertNull(iter.next());
}
}