为什么在运行集成测试时出现ObjectDisposedException？

Question

我有此代码：

    [Fact]
    public async Task CorrectlyBakesACake()
    {
        // create user
        var userdto = await CreateFakeUserAsync();
        // create Cake
        var cakedto = await CreateBasicCakeForUserAsync(userdto);
    }


    public async Task<UserDto> CreateFakeUserAsync()
    {
        var _userAppService = LocalIocManager.Resolve<UserAppService>();
        return await _userAppService.Create(
            new CreateUserDto
            {
                EmailAddress = "cakejohn@gmail.com",
                IsActive = true,
                Name = "John",
                Surname = "Nash",
                Password = "caker123",
                UserName = "cakejohn"
            });
    }


    public async Task<OwnerCakeDto> CreateBasicCakeForUserAsync(UserDto user)
    {

        LoginAsHost(user.UserName);

        var _cakeAppService = LocalIocManager.Resolve<CakeAppService>();
        await _cakeAppService.BakeCake(new BakeCakeInput()
        {
            sprinkles = true,
            color ="aqua",
            Yum = 5
        });

        return _cakeAppService.GetCakes()[0];

    }

为什么上下文对象被处置？ DI在离开服务方法时会处理对象吗？ DI何时确切决定处理上下文？ 做这些测试的“正确”方法是什么？我想尽可能地使用我的服务/域服务方法。

尝试_cakeAppService.BakeCake时出错。