@Test
public void testToPinyin_custom_rules_2() throws BadHanyuPinyinOutputFormatCombination {

    assertThat(Pinyin.toPinyin("长春", ""), is("ZHANGCHUN"));
    assertThat(Pinyin.toPinyin("长春", "", new PinyinRules().add("长春", "CHANGCHUN")), is("CHANGCHUN"));
}