public void ShouldFailBusinessLogicWhenDataIsCorrupted()
{
string query = "Select something";
Func <string, Result <string, string> > readData = q => Result.Success <string, string>(null);
Func <int, Result <string, double> > mapViews = e => Result.Success <string, double>(e);
var runRules = StateMan.GetRulesFunc();
var useCasePipline = from data in readData(query)
from executedRules in runRules(data)
from mappedViews in mapViews(executedRules)
select mappedViews;
Assert.False(useCasePipline.IsSuccess);
Assert.Equal("Cannot execute business rules. Input data is broken", useCasePipline.Error);
}
static void Main(string[] args)
{
string query = "Select something";
//double queryResult;
// Oriented Objet
var repository = new Repository();
var bl = new BusinessLogic(repository);
var application = new ApplicationService(bl);
var result = application.MapViews(query);
Console.WriteLine("Query result: {0}", result);
Console.ReadKey();
// Functional
Func <Request, Result <string, Request> > validate1 = input =>
{
if (string.IsNullOrEmpty(input.Name))
{
return(Result.Error <string, Request>("Name must not be blank"));
}
return(Result.Success <string, Request>(input));
};
Func <Request, Result <string, Request> > validate2 = input =>
{
if (input.Name.Length > 50)
{
return(Result.Error <string, Request>("Name must not be longer than 50 chars"));
}
return(Result.Success <string, Request>(input));
};
Func <Request, Result <string, Request> > validate3 = input =>
{
if (string.IsNullOrEmpty(input.Email))
{
return(Result.Error <string, Request>("Email must not be blank"));
}
return(Result.Success <string, Request>(input));
};
var request = new Request();
var combinedValidation = validate1(request).SelectMany(v2 => validate2(v2), (req, validated2) => new
{
req,
validated2
}).SelectMany(v3 => validate2(v3.validated2), (v3, validationPassed) => validationPassed);
var validationResult1 = combinedValidation.IsSuccess
? combinedValidation.Success.ToString()
: combinedValidation.Error;
Console.WriteLine("Validation1 result: {0}", validationResult1);
Console.ReadKey();
var combinedValidation2 = validate1(request)
.SelectMany(
v2 => validate2(v2)).SelectMany(
v3 => validate3(v3));
var validationResult2 = combinedValidation2.IsSuccess
? combinedValidation2.Success.ToString()
: combinedValidation2.Error;
Console.WriteLine("Validation2 result: {0}", validationResult2);
Console.ReadKey();
var readData = StateMan.GetRepoStateFunc();
var runRules = StateMan.GetRulesFunc();
var mapViews = StateMan.GetMappersFunc();
var useCasePipline = from data in readData(query)
from executedRules in runRules(data)
from mappedViews in mapViews(executedRules)
select mappedViews;
var queryResult = useCasePipline.IsSuccess ? useCasePipline.Success.ToString() : useCasePipline.Error;
Console.WriteLine("Query result: {0}", queryResult);
Console.ReadKey();
}
