/*
* 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.block;
import com.facebook.presto.block.rle.RunLengthEncodedBlock;
import com.facebook.presto.spi.block.Block;
import com.facebook.presto.spi.block.BlockBuilder;
import com.facebook.presto.spi.block.BlockBuilderStatus;
import com.facebook.presto.spi.block.VariableWidthBlockBuilder;
import io.airlift.slice.Slice;
import org.testng.annotations.Test;
public class TestRunLengthEncodedBlock
extends AbstractTestBlock
{
@Test
public void test()
{
for (int positionCount = 0; positionCount < 10; positionCount++) {
assertRleBlock(positionCount);
}
}
private static void assertRleBlock(int positionCount)
{
Slice expectedValue = createExpectedValue(0);
Block block = new RunLengthEncodedBlock(createSingleValueBlock(expectedValue), positionCount);
Slice[] expectedValues = new Slice[positionCount];
for (int position = 0; position < positionCount; position++) {
expectedValues[position] = expectedValue;
}
assertBlock(block, expectedValues);
}
private static Block createSingleValueBlock(Slice expectedValue)
{
BlockBuilder blockBuilder = new VariableWidthBlockBuilder(new BlockBuilderStatus());
blockBuilder.writeBytes(expectedValue, 0, expectedValue.length()).closeEntry();
return blockBuilder.build();
}
}