/*
* 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.serde;
import com.facebook.presto.spi.block.Block;
import com.facebook.presto.spi.block.BlockBuilderStatus;
import com.facebook.presto.spi.block.BlockEncoding;
import io.airlift.slice.DynamicSliceOutput;
import io.airlift.slice.Slices;
import org.testng.annotations.Test;
import static com.facebook.presto.block.BlockAssertions.assertBlockEquals;
import static com.facebook.presto.spi.type.VarcharType.VARCHAR;
public class TestDictionaryEncodedBlockSerde
{
@Test
public void testRoundTrip()
{
Block block = VARCHAR.createBlockBuilder(new BlockBuilderStatus())
.appendSlice(Slices.utf8Slice("alice"))
.appendSlice(Slices.utf8Slice("bob"))
.appendSlice(Slices.utf8Slice("charlie"))
.appendSlice(Slices.utf8Slice("dave"))
.build();
DynamicSliceOutput sliceOutput = new DynamicSliceOutput(1024);
BlockEncoding blockEncoding = new DictionaryEncoder(new UncompressedEncoder(sliceOutput)).append(block).append(block).append(block).finish();
Block actualBlock = blockEncoding.readBlock(sliceOutput.slice().getInput());
assertBlockEquals(actualBlock, VARCHAR.createBlockBuilder(new BlockBuilderStatus())
.appendSlice(Slices.utf8Slice("alice"))
.appendSlice(Slices.utf8Slice("bob"))
.appendSlice(Slices.utf8Slice("charlie"))
.appendSlice(Slices.utf8Slice("dave"))
.appendSlice(Slices.utf8Slice("alice"))
.appendSlice(Slices.utf8Slice("bob"))
.appendSlice(Slices.utf8Slice("charlie"))
.appendSlice(Slices.utf8Slice("dave"))
.appendSlice(Slices.utf8Slice("alice"))
.appendSlice(Slices.utf8Slice("bob"))
.appendSlice(Slices.utf8Slice("charlie"))
.appendSlice(Slices.utf8Slice("dave"))
.build());
}
}