Junit参数化测试失败，java.lang.IllegalArgumentException：参数类型不匹配

Question

@Parameterized.Parameters
public static Iterable<Object[]> input() {
    ArrayList<String>srcList = new ArrayList<String>();
    ArrayList<String>otherList = new ArrayList<String>();

    return Arrays.asList(new Object[][] {
        {srcList.add("https://www.test1.com"),20},
        {otherList.add("https://www.test2.com"),20}
    });
}

public WDDiffJunit2(ArrayList<String> url, int errCount) {
    this.url = url;
    this.errCount = errCount;
}

@Test
public void Test3() {     
    System.out.println("start test3");     
    loginPresenter.setModel(loginModel);
    loginPresenter.readProperties();
    loginPresenter.login();
    diffPresenter.setModel(diffModel);
    diffPresenter.setLoginModel(loginModel);
        assertEquals(errCount,diffPresenter.getExtractMaps(url,false).values().size());
}


public HashMap<String, String> getExtractMaps(ArrayList<String> urls, boolean isSource) {
     HashMap<String, String> a = new HashMap<String, String>();
     a.put("a","a");
     return a;
}

Answer 1

替换...

@Parameterized.Parameters
public static Iterable<Object[]> input() {
    ArrayList<String>srcList = new ArrayList<String>();
    ArrayList<String>otherList = new ArrayList<String>();

    return Arrays.asList(new Object[][] {
            {srcList.add("https://www.test1.com"),20},
            {otherList.add("https://www.test2.com"),20}
    });
}

...与：

@Parameterized.Parameters
public static Iterable<Object[]> input() {
    ArrayList<String> srcList = new ArrayList<String>();
    srcList.add("https://www.test1.com");
    ArrayList<String>otherList = new ArrayList<String>();
    otherList.add("https://www.test2.com");

    return Arrays.asList(new Object[][] {
            {srcList,20},
            {otherList,20}
    });
}

以其原始形式创建布尔值的对象[][]，int，因为srclist.add(...)返回一个布尔值。如果在Object[][]初始化程序之外填充srcList和otherList，则最终将得到一个类型正确的Object[][]:List,int。