public Policy CreatePolicy(string masterContractNumber, decimal coverAmount)
{
//normally we would get much of the parameters below from a database lookup, factory or service.
//we simplify it here for the sake of brevity and simply hardcode most values.
try
{
var newPolicy = new Policy
{
CaptureDate = DateTime.Now.Date,
DateOfCommencement = GetFirstDayOfNextMonth(),
IsActive = true,
MasterContractNumber = masterContractNumber,
SumAssured = coverAmount,
PlanCode = "PL",
PlanDescription = "Premium Life",
PolicyNumber = CreatePolicyNumber(),
Premium = coverAmount * (PremiumPercentageOfCover / 100)
};
unitOfWork.Repository.Add(newPolicy);
ValidatePolicy(newPolicy);
unitOfWork.Commit();
return newPolicy;
}
catch (Exception)
{
unitOfWork.Rollback();
throw;
}
}
public void TestInit()
{
policyService = new PolicyApplicationService(new UnitOfWork(new InMemoryRepository()));
//add default policy for testing
defaultTestPolicy = policyService.CreatePolicy(defaultMasterContract, defaultCoverAmount);
}
static void PrintPolicyDetails(Policy policy)
{
Console.WriteLine("{0} policy {1} is currently {2} and provides {3} cover with a montly premium of {4}",
policy.PlanDescription,
policy.PolicyNumber,
policy.IsActive ? "active" : "inactive",
policy.SumAssured,
policy.Premium);
Console.WriteLine();
}
/// <summary>
/// In transaction script architectures we often tend to see our validation concentrated in a sigle location such as this.
/// An alternate form uses Data Annotation validations on our domain model class combined with more complex validation being done in a
/// method such as this one. In the end, we are mainly focussed on cecking that the state of the domain object to be persisted
/// is valid just before doing the actual persistence.
/// </summary>
private void ValidatePolicy(Policy policy)
{
if (policy == null)
throw new ArgumentNullException("policy");
if (String.IsNullOrWhiteSpace(policy.PlanCode))
throw new Exception("The policy plan code must contain a valid string.");
if (policy.PlanCode.Length != 2)
throw new Exception("The policy plan code must contain exactly two characters");
if (String.IsNullOrWhiteSpace(policy.MasterContractNumber))
throw new Exception("The policy Master Contract Number code must contain a valid string.");
if (policy.MasterContractNumber.Length != 4 && policy.MasterContractNumber.ToCharArray().Any(c => !Char.IsDigit(c)))
throw new Exception("The policy Master Contract Number must contain exactly four digits.");
if (!policy.IsActive && policy.Premium > 0)
throw new Exception("An inactive policy may not have a premium that is greater than 0.");
if(!policy.IsActive && policy.SumAssured > 0)
throw new Exception("An inactive policy may not provide a valid cover amount");
}
