Specflow - 将正则表达式添加到 StepArgumentTransformation 时发生 InvalidCastException

如何解决Specflow - 将正则表达式添加到 StepArgumentTransformation 时发生 InvalidCastException

我在尝试将正则表达式添加到 StepArgumentTransformation 方法时遇到问题。

这个例子 StepArgumentTransformation 工作正常：

[StepArgumentTransformation(@"should return expected status code (\d+)")]
    public HttpStatusCode TransformToHttpStatusCode(int statusCode)
    {
        return (HttpStatusCode) statusCode;
    }

但是当我尝试将正则表达式添加到另一个时，它失败了 System.InvalidCastException: 'Object must implement IConvertible.' 我也尝试关注关于“stepargumenttransformation-is-not-getting-hit”的stackoverflow question，但随后出现此错误：

Error   CS1503  Argument 1: cannot convert from 'System.Text.RegularExpressions.Regex' to 'string'

有谁知道如何在 Specflow 中处理这个 IConvertible？下面是我的堆栈跟踪示例。

给定步骤的示例：

Given valid bookings models without AdditionalNeeds exist
| FirstName | LastName | TotalPrice | DepositPaid | BookingDates            |
| Ann       | Smith    | 1000       | true        | 2020-08-23 / 2020-08-30 |
| Jack      | Nowak    | 1500       | false       | 2020-09-23 / 2020-09-30 |

示例步骤：

[Given(@"valid bookings models without (.*) exist")]
    public void GivenValidBookingsModelsWithoutAdditionalNeedsExist(string excludedRow,IEnumerable<BookingModel> bookingModels)
    {
        _scenarioContext.SetExpectedBookings(bookingModels);
    }

使用正则表达式的 StepArgumentTransformation 示例：

[StepArgumentTransformation(@"valid bookings models without (\w+) exist")]
    public IEnumerable<BookingModel> TransformToBookingModelTestWithoutAdditionalNeeds(string excludedRow,Table table)
    {
        if (excludedRow.Equals("AdditionalNeeds"))
        {
            return table.Rows
                .Select(r => new BookingModel
                {
                    FirstName = r["FirstName"],LastName = r["LastName"],TotalPrice = int.Parse(r["TotalPrice"]),DepositPaid = bool.Parse(r["DepositPaid"]),BookingDates = GetBookingDates(r["BookingDates"]),}).ToList();
        }
        else
        {
            throw new ArgumentOutOfRangeException(excludedRow);
        }
    }

问题在于尝试获取字符串参数时 StepArgumentTransformation 的参数化。没有这个正则表达式 (\w+) 或这个 (.*) 它工作正常。

堆栈跟踪：

    Message: 
      System.InvalidCastException : Object must implement IConvertible.
      TearDown : System.Collections.Generic.KeyNotFoundException : The given key 
      'BookingsIds' was not present in the dictionary.
      Stack Trace: 
      Convert.ChangeType(Object value,Type conversionType,IFormatProvider provider)
      StepArgumentTypeConverter.ConvertSimple(Type typeToConvertTo,Object value,CultureInfo cultureInfo)
      StepArgumentTypeConverter.ConvertSimple(IBindingType typeToConvertTo,CultureInfo cultureInfo)
      StepArgumentTypeConverter.Convert(Object value,IBindingType typeToConvertTo,CultureInfo cultureInfo)
      TestExecutionEngine.ConvertArg(Object value,IBindingType typeToConvertTo)
      <>c__DisplayClass64_0.<GetExecuteArguments>b__0(Object arg,Int32 argIndex)
      Enumerable.SelectIterator[TSource,TResult](IEnumerable`1 source,Func`3 selector)+MoveNext()
      LargeArrayBuilder`1.AddRange(IEnumerable`1 items)
      EnumerableHelpers.ToArray[T](IEnumerable`1 source)
      Enumerable.ToArray[TSource](IEnumerable`1 source)
      TestExecutionEngine.GetExecuteArguments(BindingMatch match)
      TestExecutionEngine.ExecuteStep(IContextManager contextManager,StepInstance stepInstance)
      TestExecutionEngine.OnAfterLastStep()
      TestRunner.CollectScenarioErrors()
      PostBookingsEndpointTestsFeature.ScenarioCleanup() 
PostBookingsEndpointTestsFeature.PostBookingReturnsValidBookingWithoutAdditionalNeedsWhenItIsCreated() line 23
            --TearDown
            TestExecutionEngine.FireEvents(HookType hookType)
            TestExecutionEngine.FireScenarioEvents(HookType bindingEvent)
            TestExecutionEngine.OnScenarioEnd()
            TestRunner.OnScenarioEnd()
            PostBookingsEndpointTestsFeature.TestTearDown()