/*
* 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.spi.type;
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;
import java.math.BigDecimal;
import static com.facebook.presto.spi.type.Decimals.encodeScaledValue;
import static java.lang.Math.signum;
import static org.testng.Assert.assertEquals;
public class TestLongDecimalType
{
private static final LongDecimalType TYPE = (LongDecimalType) LongDecimalType.createDecimalType(20, 10);
@Test
public void testCompareTo()
throws Exception
{
testCompare("0", "-1234567891.1234567890", 1);
testCompare("1234567890.1234567890", "1234567890.1234567890", 0);
testCompare("1234567890.1234567890", "1234567890.1234567891", -1);
testCompare("1234567890.1234567890", "1234567890.1234567889", 1);
testCompare("1234567890.1234567890", "1234567891.1234567890", -1);
testCompare("1234567890.1234567890", "1234567889.1234567890", 1);
testCompare("0", "1234567891.1234567890", -1);
testCompare("1234567890.1234567890", "0", 1);
testCompare("0", "0", 0);
testCompare("-1234567890.1234567890", "-1234567890.1234567890", 0);
testCompare("-1234567890.1234567890", "-1234567890.1234567891", 1);
testCompare("-1234567890.1234567890", "-1234567890.1234567889", -1);
testCompare("-1234567890.1234567890", "-1234567891.1234567890", 1);
testCompare("-1234567890.1234567890", "-1234567889.1234567890", -1);
testCompare("0", "-1234567891.1234567890", 1);
testCompare("-1234567890.1234567890", "0", -1);
testCompare("-1234567890.1234567890", "1234567890.1234567890", -1);
testCompare("1234567890.1234567890", "-1234567890.1234567890", 1);
}
private void testCompare(String decimalA, String decimalB, int expected)
{
int actual = TYPE.compareTo(decimalAsBlock(decimalA), 0, decimalAsBlock(decimalB), 0);
assertEquals((int) signum(actual), (int) signum(expected), "bad comparison result for " + decimalA + ", " + decimalB);
}
private Block decimalAsBlock(String value)
{
Slice slice = encodeScaledValue(new BigDecimal(value));
BlockBuilder blockBuilder = new VariableWidthBlockBuilder(new BlockBuilderStatus(), 1, slice.length());
TYPE.writeSlice(blockBuilder, slice);
return blockBuilder.build();
}
}