@Test
 public void testToNullDefaultValue() throws Exception {
   config.setNullFillerChar((char) 0);
   config.setDefaultValue("42");
   typeConverter.initialize(config);
   assertEquals(42, (long) typeConverter.to(new byte[4], 0, 2, 2, true));
 }
 @Test
 public void testToNullValue() throws Exception {
   expectedEx.expect(NumberFormatException.class);
   expectedEx.expectMessage("For input string");
   config.setNullFillerChar((char) 0);
   typeConverter.initialize(config);
   assertEquals(null, typeConverter.to(new byte[4], 0, 2, 2, true));
 }
 @Before
 public void runBeforeEveryTest() {
   this.config = new TypeConverterConfig();
   this.config.setCharset(StandardCharsets.UTF_8);
   this.config.setPaddingChar('0');
   typeConverter = new IntegerToLong();
   typeConverter.initialize(config);
 }