找不到符号符号方法 of() 位置接口 java.util.list，单元测试

Question

我目前正在开发一个 Spring Boot 应用程序，我现在正在编写单元测试。但是当我运行命令'mvn test'时，我收到以下错误：

这是代码

BoardServiceTest.java

@Test
public void testGetBoards() {
    Set<Lists> list =  new HashSet<Lists>();
    
    List<Board> expectedBoards = List.of(
        new Board(1, "Studie", list),
        new Board(2, "Todo Applicatie", list)
    );
    
    when(this.boardRepo.findAll()).thenReturn(expectedBoards);
    
    var receivedBoards = this.boardService.getBoards();
    assertEquals(expectedBoards, receivedBoards);
    verify(this.boardRepo, times(1)).findAll();
}

ListsServiceTest.java

@Test
public void testGetLists() throws Exception {   
    int boardId = 1;
    Set<Task> task = new HashSet<>();

    List<Lists> expectedLists = List.of(
        new Lists(1, "registered", new Board(), task),
        new Lists(2, "open", new Board(), task)
    );
    
    when(this.listRepository.findAll()).thenReturn(expectedLists);
    
    var receivedLists = this.listService.getLists(boardId);
    
    assertEquals(expectedLists, receivedLists);
    verify(this.listRepository, times(1)).findAll();
}

Answer 1

List.of 已添加到Java 9，您需要确保使用 JDK 9+ 来编译源代码，并且在 maven pom.xml 中设置了适当的 java 版本。