BusinessValidation

BusinessValidation

An awfully small library for performing validation in Business Services.

Run Business Validation Rules

A simple example:

var validator = new Validator();
// basic validation. The checkRego method (last argument) would return a Boolean.
validator.Validate("CarRegistration", "Vehicle does not have a current, valid registration", checkRego(someVehicle));

if(validator) {
    var licensee = GetLicensee(licenceNr);

    if(licensee is null) {
        // add a raw message to the relevant Failure Bundle.
        validator.AddFailure("Licensee", $"No licensee exists with the licence number {licenceNr}.");
    } else {
        // validate an object
        validator.Validate(l => l.DateOfBirth, $"No valid date of birth is stored for the licensee with licence number {licenceNr}", licensee, l => l.DateOfBirth > DateTime.MinValue);
    }    
}    
validator.ThrowIfInvalid(); // throws exception, only if IsValid() is false, which wraps the Validation Failures dictionary.
return validator; // returns object which implicitly casts to "true" if valid. 

More example code can be found in the sample project in the repo code.

Read About it

I wrote an article explaining the genesis and usage of Business Validation here.

Build It

You can easily build the assembly by cloning the repository, changing to the root directory in a shell and running the following command:
nuke Compile
If you also want to run the unit tests:
nuke Test
Test