### Question:
NullPadder implements Padder { public String unpad(String paddedData) { return paddedData; }  String pad(String data, int maxLength); String unpad(String paddedData); static final NullPadder INSTANCE; }### Answer:
@Test public void testUnpad() throws Throwable { String result = new NullPadder().unpad(null); assertNull(result, "result"); }
@Test public void testUnpad1() throws Throwable { String result = new NullPadder().unpad("testNullPadderPaddedData"); assertEquals("testNullPadderPaddedData", result, "result"); }