我有一個(gè)名為StringProcessor. 其中的breakLongWords()方法，只要字符序列缺少預(yù)定義長(zhǎng)度的空格，就會(huì)向輸入添加零寬度空格：public class StringProcessor {    private static final int WORD_MAX_LENGTH = 40;    public String breakLongWords(CharSequence input) {        // add a zero-width space character after a word        // if its length is greater than WORD_MAX_LENGTH and doesn't have any space in it    }}static 字段WORD_MAX_LENGTH是一個(gè)實(shí)現(xiàn)細(xì)節(jié)，不應(yīng)暴露給其他類(lèi)（包括測(cè)試類(lèi)）?，F(xiàn)在，如何在不訪問(wèn) JUnit 的情況下測(cè)試邊緣情況WORD_MAX_LENGTH？例如：@Testpublic void breakLongWords_EdgeCase() {    String brokenText = stringProcessor.breakLongWords            ("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"); // its length should be = WORD_MAX_LENGTH     assertEquals(41, brokenText.length()); // 41 (WORD_MAX_LENGTH + 1) is also hard-coded here}