### Question:
ByteVector { public ByteVector putByte(final int byteValue) { int currentLength = length; if (currentLength + 1 > data.length) { enlarge(1); } data[currentLength++] = (byte) byteValue; length = currentLength; return this; } ByteVector();  ByteVector(final int initialCapacity);   ByteVector(final byte[] data); ByteVector putByte(final int byteValue); ByteVector putShort(final int shortValue); ByteVector putInt(final int intValue); ByteVector putLong(final long longValue); ByteVector putUTF8(final String stringValue); ByteVector putByteArray(
      final byte[] byteArrayValue, final int byteOffset, final int byteLength);  }### Answer:
@Test public void testPutByte() { ByteVector byteVector = new ByteVector(0); byteVector.putByte(1); assertArrayEquals(new byte[] {1}, toArray(byteVector)); }