### Question:
MD5Template implements Template, Serializable { public Object getKey () { return key; } MD5Template(Object key, Object value);  MD5Template(Object key, byte[] digest); byte[] digest(Object obj); @Override boolean equals(Object obj); @Override int hashCode(); Object getKey(); byte[] getDigest(); String getDigestAsString(); String toString(); static byte[] serialize(Object obj);  }### Answer:
@Test public void testGetKey() throws Throwable { byte[] digest = new byte[1]; Integer key = Integer.valueOf(0); Integer result = (Integer) new MD5Template(key, digest).getKey(); assertSame(key, result, "result"); }
@Test public void testGetKey1() throws Throwable { byte[] key = new byte[1]; byte[] result = (byte[]) new MD5Template(key, "testString".getBytes()).getKey(); assertSame(key, result, "result"); }
@Test public void testGetKey2() throws Throwable { String result = (String) new MD5Template("testString", "\n".getBytes()).getKey(); assertEquals("testString", result, "result"); }