public void testStringConverter() {
StringConverter stringConverter = new StringConverter();
assertNull(stringConverter.convert(null));
assertEquals("123", stringConverter.convert("123"));
assertEquals("65,66", stringConverter.convert(arrb(65, 66)));
assertEquals("Ab", stringConverter.convert(arrc('A', 'b')));
assertEquals("One,two", stringConverter.convert(arrs("One", "two")));
assertEquals("123", stringConverter.convert(Integer.valueOf(123)));
assertEquals("java.lang.String", stringConverter.convert(String.class));