测试 MassTransit 状态机传奇 activity

Test MassTransit state machine saga activity

我正在尝试对我的 MassTransit 状态机传奇的自定义 Activity 进行单元测试。

看起来像这样:

public class UpdateActivity : Activity<UpdateState>
{
    private readonly ConsumeContext _consumeContext;
    private readonly ILogger<UpdateActivity> _logger;

    public UpdateActivity(
        ConsumeContext consumeContext,
        ILogger<UpdateActivity> logger
    )
    {
        _consumeContext = consumeContext;
        _logger = logger;
    }

    public void Probe(ProbeContext context) => context.CreateScope(nameof(UpdateActivity));

    public void Accept(StateMachineVisitor visitor) => visitor.Visit(this);

    public async Task Execute(BehaviorContext<UpdateState> context, Behavior<UpdateState> next)
    {
        await DoStuffAsync(context.Instance);
        await next.Execute(context).ConfigureAwait(false);
    }

    public async Task Execute<T>(BehaviorContext<UpdateState, T> context, Behavior<UpdateState, T> next)
    {
        await DoStuffAsync(context.Instance);
        await next.Execute(context).ConfigureAwait(false);
    }

    public Task Faulted<TException>(BehaviorExceptionContext<UpdateState, TException> context, Behavior<UpdateState> next) where TException : Exception
        => next.Faulted(context);

    public Task Faulted<T, TException>(BehaviorExceptionContext<UpdateState, T, TException> context, Behavior<UpdateState, T> next) where TException : Exception
        => next.Faulted(context);
}

我想不通的是,在为此 class 编写单元测试时,我如何 mock/fake 期望 ConsumeContext。我尝试使用 InMemoryTestHarness 查找内容,但找不到合适的内容。

编辑:

我不妨把这个也扔进去。如何在测试工具中模拟 context 或 运行?这样我也可以对这个 Activity 进行单元测试?

    public class UpdateActivity : Activity<UpdateState, IDataUpdatedEvent>
    {
        private readonly ILogger<UpdateActivity> _logger;

        public UpdateActivity(
            ILogger<UpdateActivity > logger
        )
        {
            _logger = logger;
        }

        public void Probe(ProbeContext context) => context.CreateScope(nameof(UpdateActivity));

        public void Accept(StateMachineVisitor visitor) => visitor.Visit(this);

        public async Task Execute(BehaviorContext<UpdateState, IDataUpdatedEvent> context, Behavior<UpdateState, IDataUpdatedEvent> next)
        {

MassTransit test harnesses 允许测试状态机,以及使用依赖注入的活动。

考虑到这些工具的可用性,“使用模拟进行隔离测试”的想法是毫无意义的。