| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.cassandra.db.marshal; |
| |
| import static org.junit.Assert.*; |
| |
| import java.math.BigDecimal; |
| import java.nio.ByteBuffer; |
| import java.util.Arrays; |
| |
| import org.apache.cassandra.utils.ByteBufferUtil; |
| import org.junit.Test; |
| |
| public class DecimalTypeTest |
| { |
| private static final String LOW = "12.34"; |
| private static final String HIGH = "34.5678"; |
| |
| private static BigDecimal zero = new BigDecimal("0.0"); |
| private static BigDecimal minus = new BigDecimal("-1.000001"); |
| private static BigDecimal low = new BigDecimal(LOW); |
| private static BigDecimal high = new BigDecimal(HIGH); |
| |
| @Test |
| public void test1Decompose_compose() |
| { |
| ByteBuffer bb = DecimalType.instance.decompose(low); |
| |
| String string = DecimalType.instance.compose(bb).toPlainString(); |
| |
| // check that the decomposed buffer when re-composed is equal to the initial string. |
| assertEquals(LOW, string); |
| |
| // check that a null argument yields an empty byte buffer |
| bb = DecimalType.instance.decompose(null); |
| assertEquals(bb, ByteBufferUtil.EMPTY_BYTE_BUFFER); |
| } |
| |
| @Test |
| public void test2Compare() |
| { |
| ByteBuffer lowBB = DecimalType.instance.decompose(low); |
| ByteBuffer low2BB = DecimalType.instance.decompose(low); |
| ByteBuffer highBB = DecimalType.instance.decompose(high); |
| assertEquals(-1, DecimalType.instance.compare(lowBB, highBB)); |
| |
| lowBB = DecimalType.instance.decompose(low); |
| highBB = DecimalType.instance.decompose(high); |
| assertEquals(1, DecimalType.instance.compare(highBB, lowBB)); |
| |
| lowBB = DecimalType.instance.decompose(low); |
| assertEquals(0, DecimalType.instance.compare(low2BB, lowBB)); |
| |
| lowBB = DecimalType.instance.decompose(low); |
| assertEquals(-1, DecimalType.instance.compare(ByteBufferUtil.EMPTY_BYTE_BUFFER, lowBB)); |
| |
| lowBB = DecimalType.instance.decompose(low); |
| assertEquals(1, DecimalType.instance.compare(lowBB,ByteBufferUtil.EMPTY_BYTE_BUFFER)); |
| |
| assertEquals(0, DecimalType.instance.compare(ByteBufferUtil.EMPTY_BYTE_BUFFER,ByteBufferUtil.EMPTY_BYTE_BUFFER)); |
| } |
| |
| @Test |
| public void test3Sort() |
| { |
| ByteBuffer zeroBB = DecimalType.instance.decompose(zero); |
| ByteBuffer minusBB = DecimalType.instance.decompose(minus); |
| ByteBuffer lowBB = DecimalType.instance.decompose(low); |
| ByteBuffer highBB = DecimalType.instance.decompose(high); |
| |
| ByteBuffer[] array = {highBB,minusBB,lowBB,lowBB,zeroBB,minusBB}; |
| |
| // Sort the array of ByteBuffer using a DecimalType comparator |
| Arrays.sort(array, DecimalType.instance); |
| |
| // Check that the array is in order |
| for (int i = 1; i < array.length; i++) |
| { |
| BigDecimal i0 = DecimalType.instance.compose(array[i - 1]); |
| BigDecimal i1 = DecimalType.instance.compose(array[i]); |
| assertTrue("#" + i, i0.compareTo(i1) <= 0); |
| } |
| } |
| } |