/*
* Copyright 2011 Thilo Planz
* Copyright 2014 Andreas Schildbach
*
* 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 org.bitcoinj.core;
import java.math.BigInteger;
import java.util.Date;
import org.junit.Test;
import static org.junit.Assert.*;
public class UtilsTest {
@Test
public void testReverseBytes() {
assertArrayEquals(new byte[]{1, 2, 3, 4, 5}, Utils.reverseBytes(new byte[]{5, 4, 3, 2, 1}));
}
@Test
public void testReverseDwordBytes() {
assertArrayEquals(new byte[]{1, 2, 3, 4, 5, 6, 7, 8}, Utils.reverseDwordBytes(new byte[]{4, 3, 2, 1, 8, 7, 6, 5}, -1));
assertArrayEquals(new byte[]{1, 2, 3, 4}, Utils.reverseDwordBytes(new byte[]{4, 3, 2, 1, 8, 7, 6, 5}, 4));
assertArrayEquals(new byte[0], Utils.reverseDwordBytes(new byte[]{4, 3, 2, 1, 8, 7, 6, 5}, 0));
assertArrayEquals(new byte[0], Utils.reverseDwordBytes(new byte[0], 0));
}
@Test
public void testMaxOfMostFreq() throws Exception {
assertEquals(0, Utils.maxOfMostFreq());
assertEquals(0, Utils.maxOfMostFreq(0, 0, 1));
assertEquals(2, Utils.maxOfMostFreq(1, 1, 2, 2));
assertEquals(1, Utils.maxOfMostFreq(1, 1, 2, 2, 1));
assertEquals(-1, Utils.maxOfMostFreq(-1, -1, 2, 2, -1));
}
@Test
public void compactEncoding() throws Exception {
assertEquals(new BigInteger("1234560000", 16), Utils.decodeCompactBits(0x05123456L));
assertEquals(new BigInteger("c0de000000", 16), Utils.decodeCompactBits(0x0600c0de));
assertEquals(0x05123456L, Utils.encodeCompactBits(new BigInteger("1234560000", 16)));
assertEquals(0x0600c0deL, Utils.encodeCompactBits(new BigInteger("c0de000000", 16)));
}
@Test
public void dateTimeFormat() {
assertEquals("2014-11-16T10:54:33Z", Utils.dateTimeFormat(1416135273781L));
assertEquals("2014-11-16T10:54:33Z", Utils.dateTimeFormat(new Date(1416135273781L)));
}
}