### Question:
AbstractConfig implements Serializable { protected static void appendAttributes(Map<String, Object> parameters, Object config) { appendAttributes(parameters, config, null); }  @Parameter(excluded = true) String getId(); void setId(String id); void updateIdIfAbsent(String value); Map<String, String> getMetaData(); @Parameter(excluded = true) String getPrefix(); void setPrefix(String prefix); void refresh(); @Override String toString(); @Parameter(excluded = true) boolean isValid();  }### Answer:
@Test public void testAppendAttributes1() throws Exception { Map<String, Object> parameters = new HashMap<String, Object>(); AbstractConfig.appendAttributes(parameters, new AttributeConfig('l', true, (byte) 0x01), "prefix"); Assertions.assertEquals('l', parameters.get("prefix.let")); Assertions.assertEquals(true, parameters.get("prefix.activate")); Assertions.assertFalse(parameters.containsKey("prefix.flag")); }
@Test public void testAppendAttributes2() throws Exception { Map<String, Object> parameters = new HashMap<String, Object>(); AbstractConfig.appendAttributes(parameters, new AttributeConfig('l', true, (byte) 0x01)); Assertions.assertEquals('l', parameters.get("let")); Assertions.assertEquals(true, parameters.get("activate")); Assertions.assertFalse(parameters.containsKey("flag")); }