/*
* 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.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 com.facebook.presto.spi.type.VarcharType;
import com.google.common.primitives.Ints;
import io.airlift.slice.Slice;
import org.testng.annotations.Test;
import java.util.List;
import java.util.concurrent.ThreadLocalRandom;
import static com.facebook.presto.spi.type.VarcharType.createUnboundedVarcharType;
import static java.lang.String.format;
import static java.util.Arrays.copyOfRange;
import static org.testng.Assert.assertEquals;
import static org.testng.Assert.assertTrue;
public class TestVariableWidthBlock
extends AbstractTestBlock
{
@Test
public void test()
{
Slice[] expectedValues = createExpectedValues(100);
assertVariableWithValues(expectedValues);
assertVariableWithValues((Slice[]) alternatingNullValues(expectedValues));
}
@Test
public void testCopyRegion()
throws Exception
{
Slice[] expectedValues = createExpectedValues(100);
Block block = createBlockBuilderWithValues(expectedValues).build();
Block actual = block.copyRegion(10, 10);
Block expected = createBlockBuilderWithValues(copyOfRange(expectedValues, 10, 20)).build();
assertEquals(actual.getPositionCount(), expected.getPositionCount());
assertEquals(actual.getSizeInBytes(), expected.getSizeInBytes());
}
@Test
public void testCopyPositions()
throws Exception
{
Slice[] expectedValues = (Slice[]) alternatingNullValues(createExpectedValues(100));
BlockBuilder blockBuilder = createBlockBuilderWithValues(expectedValues);
assertBlockFilteredPositions(expectedValues, blockBuilder.build(), Ints.asList(0, 2, 4, 6, 7, 9, 10, 16));
}
@Test
public void testLazyBlockBuilderInitialization()
throws Exception
{
Slice[] expectedValues = createExpectedValues(100);
BlockBuilder emptyBlockBuilder = new VariableWidthBlockBuilder(new BlockBuilderStatus(), 0, 0);
BlockBuilder blockBuilder = new VariableWidthBlockBuilder(new BlockBuilderStatus(), expectedValues.length, 32);
assertEquals(blockBuilder.getSizeInBytes(), emptyBlockBuilder.getSizeInBytes());
assertEquals(blockBuilder.getRetainedSizeInBytes(), emptyBlockBuilder.getRetainedSizeInBytes());
writeValues(expectedValues, blockBuilder);
assertTrue(blockBuilder.getSizeInBytes() > emptyBlockBuilder.getSizeInBytes());
assertTrue(blockBuilder.getRetainedSizeInBytes() > emptyBlockBuilder.getRetainedSizeInBytes());
blockBuilder = blockBuilder.newBlockBuilderLike(new BlockBuilderStatus());
assertEquals(blockBuilder.getSizeInBytes(), emptyBlockBuilder.getSizeInBytes());
assertEquals(blockBuilder.getRetainedSizeInBytes(), emptyBlockBuilder.getRetainedSizeInBytes());
}
@Test
private void testGetSizeInBytes()
{
int numEntries = 1000;
VarcharType unboundedVarcharType = createUnboundedVarcharType();
VariableWidthBlockBuilder blockBuilder = new VariableWidthBlockBuilder(new BlockBuilderStatus(), numEntries, 20);
for (int i = 0; i < numEntries; i++) {
unboundedVarcharType.writeString(blockBuilder, String.valueOf(ThreadLocalRandom.current().nextLong()));
}
Block block = blockBuilder.build();
List<Block> splitQuarter = splitBlock(block, 4);
int sizeInBytes = block.getSizeInBytes();
int quarter1size = splitQuarter.get(0).getSizeInBytes();
int quarter2size = splitQuarter.get(1).getSizeInBytes();
int quarter3size = splitQuarter.get(2).getSizeInBytes();
int quarter4size = splitQuarter.get(3).getSizeInBytes();
double expectedQuarterSizeMin = sizeInBytes * 0.2;
double expectedQuarterSizeMax = sizeInBytes * 0.3;
assertTrue(quarter1size > expectedQuarterSizeMin && quarter1size < expectedQuarterSizeMax, format("quarter1size is %s, should be between %s and %s", quarter1size, expectedQuarterSizeMin, expectedQuarterSizeMax));
assertTrue(quarter2size > expectedQuarterSizeMin && quarter2size < expectedQuarterSizeMax, format("quarter2size is %s, should be between %s and %s", quarter2size, expectedQuarterSizeMin, expectedQuarterSizeMax));
assertTrue(quarter3size > expectedQuarterSizeMin && quarter3size < expectedQuarterSizeMax, format("quarter3size is %s, should be between %s and %s", quarter3size, expectedQuarterSizeMin, expectedQuarterSizeMax));
assertTrue(quarter4size > expectedQuarterSizeMin && quarter4size < expectedQuarterSizeMax, format("quarter4size is %s, should be between %s and %s", quarter4size, expectedQuarterSizeMin, expectedQuarterSizeMax));
assertEquals(quarter1size + quarter2size + quarter3size + quarter4size, sizeInBytes);
}
private void assertVariableWithValues(Slice[] expectedValues)
{
BlockBuilder blockBuilder = createBlockBuilderWithValues(expectedValues);
assertBlock(blockBuilder, expectedValues);
assertBlock(blockBuilder.build(), expectedValues);
}
private static BlockBuilder createBlockBuilderWithValues(Slice[] expectedValues)
{
BlockBuilder blockBuilder = new VariableWidthBlockBuilder(new BlockBuilderStatus(), expectedValues.length, 32);
return writeValues(expectedValues, blockBuilder);
}
private static BlockBuilder writeValues(Slice[] expectedValues, BlockBuilder blockBuilder)
{
for (Slice expectedValue : expectedValues) {
if (expectedValue == null) {
blockBuilder.appendNull();
}
else {
blockBuilder.writeBytes(expectedValue, 0, expectedValue.length()).closeEntry();
}
}
return blockBuilder;
}
}