### Question:
Utils { public static String getValueShortString(BigInteger number) { BigInteger result = number; int pow = 0; while (result.compareTo(_1000_) == 1 || result.compareTo(_1000_) == 0) { result = result.divide(_1000_); pow += 3; } return result.toString() + "·(" + "10^" + pow + ")"; }  static BigInteger unifiedNumericToBigInteger(String number); static String longToDateTime(long timestamp); static String getValueShortString(BigInteger number); static byte[] addressStringToBytes(String hex); static boolean isValidAddress(byte[] addr); static String getAddressShortString(byte[] addr); static SecureRandom getRandom(); static String getHashListShort(List<byte[]> blockHashes); static String getNodeIdShort(String nodeId); static long toUnixTime(long javaTime); static long fromUnixTime(long unixTime); static T[] mergeArrays(T[] ... arr); static String align(String s, char fillChar, int targetLen, boolean alignRight); static String repeat(String s, int n); static boolean contains(List<byte[]> list, byte[] valueToFind); static void validateArrayAllegedSize(byte[] data, int offset, int allegedSize); static byte[] safeCopyOfRange(byte[] data, int from, int size); static boolean isDecimalString(String s); static boolean isHexadecimalString(String s); static long decimalStringToLong(String s); static long hexadecimalStringToLong(String s); static final double JAVA_VERSION; }### Answer:
@Test public void testGetValueShortString1() { String expected = "123·(10^24)"; String result = Utils.getValueShortString(new BigInteger("123456789123445654363653463")); assertEquals(expected, result); }
@Test public void testGetValueShortString2() { String expected = "123·(10^3)"; String result = Utils.getValueShortString(new BigInteger("123456")); assertEquals(expected, result); }
@Test public void testGetValueShortString3() { String expected = "1·(10^3)"; String result = Utils.getValueShortString(new BigInteger("1234")); assertEquals(expected, result); }
@Test public void testGetValueShortString4() { String expected = "123·(10^0)"; String result = Utils.getValueShortString(new BigInteger("123")); assertEquals(expected, result); }
@Test public void testGetValueShortString5() { byte[] decimal = Hex.decode("3913517ebd3c0c65000000"); String expected = "69·(10^24)"; String result = Utils.getValueShortString(new BigInteger(decimal)); assertEquals(expected, result); }