@Test
public void testConvert02() throws Exception {

    // 前処理
    StringConverter stringTransformer = new StringConverterToLowerCase();
    // テスト実施
    String resultString = stringTransformer
            .convert("abcdefghijklmnopqrstuvwxyz_ABCDEFGHIJKLMNOPQRSTUVWXYZ");
    // 判定
    assertEquals("abcdefghijklmnopqrstuvwxyz_abcdefghijklmnopqrstuvwxyz",
            resultString);
}