spring 引导应用程序的单元测试

Question

I have never used JUnit testing before.I need to test my code with JUnit. I have been searching google for all day but the problem is that I found examples using Mockito but in my code I didn't use dependency injections(@Autowired). How can i use it for these methods?

Thanks in advance.

public class WordService {

public WordService() {

}


public static String upperCaseFirst(String value) {
    char[] listChar = value.toCharArray();
    listChar[0] = Character.toUpperCase(listChar[0]);
    return new String(listChar);
}

/**
 * Find and return the search word
 * @param name
 * @return the word sought or null if not found
 */
public Word findWordByName(String name){

    String nameUpper = upperCaseFirst(name);

    WordDao w = new WordDao();
    Word found = w.findWord(nameUpper);

    List<String> definitions = new ArrayList<>();

    if(found != null) {
        for(int i=0; i<found.getDefinition().size(); i++) {
            StringBuffer defBuffer = new StringBuffer();

            String definitionFound = found.getDefinition().get(i);
            definitionFound = definitionFound.replace("\n", "");

            defBuffer.append(definitionFound);
            defBuffer.append("_");

            definitions.add(i, defBuffer.toString());
        }
        found.setDefinition(definitions);
    }
    return found;
}


/**
 * 
 * @return Return a list of words
 */
public List<Word> findAllWord(){

    WordDao w = new WordDao();
    return w.findAllWords();
}

}

Answer 1

You can extract WordDao to class level as a field. Create set method. After that in unit test you can mock WordDao and control what will be result of methods call. For the second method it something like:

WordDao wMocked = Mock(WordDao.class)
Word word1 = new...
Word word2 = new...
List<Word> words = List.of(word1, word2);
when(w.findAllWords()).thenReturn(words);
WordService ws = new WordService();
ws.setWordDao(wMocked);
Assert.equals(words, ws.findAllWords);