### Question:
DataTypesCodec { public static int readUnsignedInt3LE(final ByteBuf in) { return in.readUnsignedMediumLE(); }  static void skipBytes(final int length, final ByteBuf in); static void readNul(final ByteBuf in); static float readFloatLE(final ByteBuf in); static double readDoubleLE(final ByteBuf in); static BitSet readBitmap(final int length, final ByteBuf in); static byte readInt1(final ByteBuf in); static short readInt2LE(final ByteBuf in); static int readInt3LE(final ByteBuf in); static int readInt4LE(final ByteBuf in); static long readInt8LE(final ByteBuf in); static short readUnsignedInt1(final ByteBuf in); static int readUnsignedInt2BE(final ByteBuf in); static int readUnsignedInt2LE(final ByteBuf in); static int readUnsignedInt3BE(final ByteBuf in); static int readUnsignedInt3LE(final ByteBuf in); static long readUnsignedInt4BE(final ByteBuf in); static long readUnsignedInt4LE(final ByteBuf in); static long readUnsignedInt5BE(final ByteBuf in); static long readUnsignedInt6LE(final ByteBuf in); static BigInteger readUnsignedInt8LE(final ByteBuf in); static long readLengthCodedIntLE(final ByteBuf in); static byte[] readBytes(final int length, final ByteBuf in); static String readFixedLengthString(final int length, final ByteBuf in); static String readLengthCodedString(final ByteBuf in); static String readNulTerminatedString(final ByteBuf in); static void writeByte(final byte data, final ByteBuf out); static void writeInt5(final long data, final ByteBuf out); static void writeIntN(final int length, final long data, final ByteBuf out); static void writeInt2LE(final short data, final ByteBuf out); static void writeInt4LE(final int data, final ByteBuf out); static void writeIntNLE(final int length, final long data, final ByteBuf out); static void writeLengthCodedInt(final int data, final ByteBuf out); static void writeBytes(final byte[] data, final ByteBuf out); static void writeNulTerminatedString(final String data, final ByteBuf out); static void writeLengthCodedBinary(final byte[] data, final ByteBuf out);  }### Answer:
@Test public void assertReadUnsignedInt3LE() { when(byteBuf.readUnsignedMediumLE()).thenReturn(1); assertThat(DataTypesCodec.readUnsignedInt3LE(byteBuf), is(1)); }