如何在.NET中為webapi撰寫單元測驗

我的洗掉方法控制器：

[HttpDelete("{toDoListId}")]
    public async Task<ActionResult> DeleteToDoList(int toDoListId)
    {

        var toDoListEntity = await _toDoListRepository.GetSpecificTodoAsync(toDoListId);
            
        if (toDoListEntity == null)
        {
            return NotFound();
        }
        _toDoListRepository.DeleteToDoList(toDoListEntity); 
        
        await _toDoListRepository.SaveChangesAsync();
        return NoContent();

    }

我的存盤庫：

public async Task<ToDoList?> GetSpecificTodoAsync(int taskId)
    {
        return await _context.ToDoLists.Where(c => c.Id == taskId).FirstOrDefaultAsync();
    }

public void DeleteToDoList(ToDoList toDoListDto)
    {
        _context.ToDoLists.Remove(toDoListDto);
    }

我的測驗用例用于檢查專案是否被洗掉以及洗掉后是否回傳任何內容。但是我的兩個測驗用例都失敗了。有關如何為洗掉部分撰寫測驗用例的任何幫助，我將不勝感激。我也在嘗試測驗其他方法，但不幸的是我被困在這里。請幫助我

public class UnitTest1
    {
 
        private readonly Mock<IToDoListRepository> repositoryStub = new ();
        private readonly Mock<IMapper> mapper = new Mock<IMapper>();
        private readonly Random Rand = new();
        private ToDoList GenerateRandomItem()
        {
            return new()
            {
                Id = Rand.Next(),
                Description= Guid.NewGuid().ToString(),
                Title = Guid.NewGuid().ToString(),
                StartDate = DateTime.Now,
                EndDate = DateTime.Now,
                Done = false
            };
        }

 [Fact]
        public void Delete_removesEntry()
        {
            //arrange
            var existingItem =  GenerateRandomItem();
            
            var controller = new ToDoController(repositoryStub.Object, mapper.Object);
            var itemID = existingItem.Id;

            //act
            controller.DeleteToDoList(itemID);

            //assert
            
            Assert.Null(repositoryStub.Object.GetSpecificTodoAsync(itemID));

        }
        [Fact]
        public async Task DeleteItemAsync_WithExistingItem_ReturnNoContent()
        {
            //Arrange
            var existingItem = GenerateRandomItem();
            repositoryStub.Setup(repo => repo.GetSpecificTodoAsync(existingItem.Id)).ReturnsAsync((existingItem));

            var itemID = existingItem.Id;
            var controller = new ToDoController(repositoryStub.Object, mapper.Object);
            //Act

            var result = await controller.DeleteToDoList(itemID);

            //assert
            result.Should().BeOfType<NoContentResult>();

        }

uj5u.com熱心網友回復：

兩個測驗用例都失敗了，因為模擬沒有設定為每個測驗用例的預期行為。

所示測驗中還存在潛在的競爭條件，因為它們共享相同的模擬實體。這將在設定模擬時導致問題，因為一個測驗用例可能會覆寫另一個用例的設定。

更新測驗，使它們彼此隔離。

在第一個測驗中，可以通過檢查模擬以查看是否呼叫了預期的成員來驗證預期的行為。

[Fact]
public async Task DeleteToDoList_Should_RemoveEntry() {
    //arrange
    ToDoList existingItem =  GenerateRandomItem();
    var itemID = existingItem.Id;
    
    Mock<IToDoListRepository> repositoryStub = new ();
    
    //Setup expected behavior of mock
    repositoryStub
        .Setup(_ => _.GetSpecificTodoAsync(itemID))
        .ReturnsAsync(existingItem);
    
    var controller = new ToDoController(repositoryStub.Object, mapper.Object);

    //act
    await controller.DeleteToDoList(itemID);

    //assert
    repositoryStub.Verify(_ => _.DeleteToDoList(existingItem));
}

在另一個測驗中，需要設定模擬以確保主題執行完成。

[Fact]
public async Task DeleteToDoList_WithExistingItem_Should_ReturnNoContent() {
    //Arrange
    ToDoList existingItem =  GenerateRandomItem();
    var itemID = existingItem.Id;
    
    Mock<IToDoListRepository> repositoryStub = new ();
    
    //Setup expected behavior of mock
    repositoryStub
        .Setup(_ => _.GetSpecificTodoAsync(itemID))
        .ReturnsAsync(existingItem);
    repositoryStub.Setup(_ => _.SaveChangesAsync()).ReturnsAsynt(true);
    
    var controller = new ToDoController(repositoryStub.Object, mapper.Object);
    
    //Act
    ActionResult result = await controller.DeleteToDoList(itemID);

    //assert
    result.Should().BeOfType<NoContentResult>();
}

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