### Question:
Utils { public static int maxOfMostFreq(int... items) { ArrayList<Integer> list = new ArrayList<>(items.length); for (int item : items) list.add(item); return maxOfMostFreq(list); }  static byte[] bigIntegerToBytes(BigInteger b, int numBytes); static void uint16ToByteArrayLE(int val, byte[] out, int offset); static void uint32ToByteArrayLE(long val, byte[] out, int offset); static void uint32ToByteArrayBE(long val, byte[] out, int offset); static void int64ToByteArrayLE(long val, byte[] out, int offset); static void uint16ToByteStreamLE(int val, OutputStream stream); static void uint16ToByteStreamBE(int val, OutputStream stream); static void uint32ToByteStreamLE(long val, OutputStream stream); static void uint32ToByteStreamBE(long val, OutputStream stream); static void int64ToByteStreamLE(long val, OutputStream stream); static void uint256ToByteStreamLE(BigInteger val, OutputStream stream); static void uint64ToByteStreamLE(BigInteger val, OutputStream stream); static int readUint16(byte[] bytes, int offset); static long readUint32(byte[] bytes, int offset); static long readInt64(byte[] bytes, int offset); static BigInteger readUint256(byte[] bytes, int offset); static long readUint32BE(byte[] bytes, int offset); static int readUint16BE(byte[] bytes, int offset); static int readUint16FromStream(InputStream is); static long readUint32FromStream(InputStream is); static byte[] reverseBytes(byte[] bytes); static byte[] sha256hash160(byte[] input); static BigInteger decodeMPI(byte[] mpi, boolean hasLength); static byte[] encodeMPI(BigInteger value, boolean includeLength); static BigInteger decodeCompactBits(long compact); static long encodeCompactBits(BigInteger value); static Date rollMockClock(int seconds); static Date rollMockClockMillis(long millis); static void setMockClock(); static void setMockClock(long mockClockSeconds); static Date now(); static long currentTimeMillis(); static long currentTimeSeconds(); static String dateTimeFormat(Date dateTime); static String dateTimeFormat(long dateTime); static boolean checkBitLE(byte[] data, int index); static void setBitLE(byte[] data, int index); static void sleep(long millis); static void setMockSleep(boolean isEnable); static void passMockSleep(); static void finishMockSleep(); static int maxOfMostFreq(int... items); static int maxOfMostFreq(List<Integer> items); static boolean isAndroidRuntime(); static boolean isLinux(); static boolean isWindows(); static boolean isMac(); static final Joiner SPACE_JOINER; static final BaseEncoding HEX; static volatile Date mockTime; }### Answer:
@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)); }