### Question:
IntegerStringCodec implements BlockCodec<Integer> { @Override public Integer zeroValue() { return 0; }  @Override Integer decode(byte[] data, int bitLength); @Override Integer zeroValue(); @Override byte[] encode(Integer data, int bitLength); @Override void reset(); @Override String getValueType();  }### Answer:
@Test public void testZero() { IntegerStringCodec codec = new IntegerStringCodec(); Assert.assertEquals(0, codec.zeroValue(), 0); }