/*
* 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.facebook.presto.execution;
import com.facebook.presto.SequencePageBuilder;
import com.facebook.presto.execution.buffer.PageSplitterUtil;
import com.facebook.presto.spi.Page;
import com.facebook.presto.spi.type.Type;
import com.facebook.presto.testing.MaterializedResult;
import com.google.common.collect.ImmutableList;
import org.testng.annotations.Test;
import java.util.List;
import static com.facebook.presto.SessionTestUtils.TEST_SESSION;
import static com.facebook.presto.operator.OperatorAssertion.toMaterializedResult;
import static com.facebook.presto.spi.type.BigintType.BIGINT;
import static com.facebook.presto.testing.assertions.Assert.assertEquals;
import static io.airlift.testing.Assertions.assertGreaterThan;
import static io.airlift.testing.Assertions.assertLessThanOrEqual;
public class TestPageSplitterUtil
{
@Test
public void testSplitPage()
throws Exception
{
int positionCount = 10;
int maxPageSizeInBytes = 100;
List<Type> types = ImmutableList.of(BIGINT, BIGINT, BIGINT);
Page largePage = SequencePageBuilder.createSequencePage(types, positionCount, 0, 1, 1);
List<Page> pages = PageSplitterUtil.splitPage(largePage, maxPageSizeInBytes);
assertGreaterThan(pages.size(), 1);
assertPageSize(pages, maxPageSizeInBytes);
assertPositionCount(pages, positionCount);
MaterializedResult actual = toMaterializedResult(TEST_SESSION, types, pages);
MaterializedResult expected = toMaterializedResult(TEST_SESSION, types, ImmutableList.of(largePage));
assertEquals(actual, expected);
}
private static void assertPageSize(List<Page> pages, long maxPageSizeInBytes)
{
for (Page page : pages) {
assertLessThanOrEqual(page.getSizeInBytes(), maxPageSizeInBytes);
}
}
private static void assertPositionCount(List<Page> pages, int positionCount)
{
int totalPositionCount = 0;
for (Page page : pages) {
totalPositionCount += page.getPositionCount();
}
assertEquals(totalPositionCount, positionCount);
}
}