public void QueryHandler_Exception_Test()
{
#region preparation
ApplicationContext _Context = new ApplicationContext();
string errorType = GetBooksQueryError.Set_InternalServerError("").ErrorType;
string errorDetail_part = "Value cannot be null";
#endregion
#region test error
Result <GetBooksQueryResult, GetBooksQueryError> result =
new GetBooksQueryHandler(_Context).Handle(null);
Assert.AreEqual(errorType, result.Error.ErrorType);
Assert.IsTrue(result.Error.ErrorDetail.Contains(errorDetail_part));
#endregion
}
public Result <GetBooksQueryResult, GetBooksQueryError> GetBooks(GetBooksQuery query)
{
Result <GetBooksQueryResult, GetBooksQueryError> _queryResult;
try // try dispatch of the command
{
_queryResult =
_QueryDispatcher.Dispatch <GetBooksQueryResult, GetBooksQueryError>(_Context, query); //handle the request
}
catch (Exception _exception) // catch every exception
{
string errorMsg = $"Error in {this.GetType()} queryHandler. Message: {_exception.Message} \n Stacktrace: {_exception.StackTrace}";
_Log.ErrorFormat(errorMsg);
return(Result.Fail <GetBooksQueryResult, GetBooksQueryError>(GetBooksQueryError.Set_InternalServerError(errorMsg))); // return internal server error
}
finally
{
// do nothing
}
//GetBooksQueryHandler handler = new GetBooksQueryHandler();
//return handler.Handle(_Context, query);
return(_queryResult);
}