public void ShouldReturnProperExhaustionDateWithOneDosage()
{
// arrange
var plan = new Plan();
var startDate = new DateTime(2014, 1, 1);
plan.RegisterDosage(startDate, FivePerDay);
var stock = new Stock(100, startDate);
// act
var exhaustionDate = plan.CalculateExhaustionDate(stock);
// assert
Assert.That(exhaustionDate, Is.EqualTo(new DateTime(2014, 1, 20)));
}
public void ShouldIgnoreDosagesPreviousToStartDate()
{
// arrange
var plan = new Plan();
var startDate = new DateTime(2014, 1, 1);
plan.RegisterDosage(startDate.AddDays(-7), TenPerDay);
plan.RegisterDosage(startDate, FivePerDay);
var initialStock = new Stock(100, startDate);
// act
var remaining = plan.CalculateRemaining(initialStock, new DateTime(2014, 1, 5));
var exhaustionDate = plan.CalculateExhaustionDate(initialStock);
// assert
Assert.That(remaining, Is.EqualTo(new Stock(80, new DateTime(2014, 1, 5))));
Assert.That(exhaustionDate, Is.EqualTo(new DateTime(2014, 1, 20)));
}
public void ShouldTakeIntoAccountDosagesOverlapingWithStartDate()
{
// arrange
var plan = new Plan();
var startDate = new DateTime(2014, 1, 1);
plan.RegisterDosage(startDate.AddDays(-7), TenPerDay);
plan.RegisterDosage(startDate.AddDays(1), FivePerDay);
var initialStock = new Stock(100, startDate);
// act
var remaining = plan.CalculateRemaining(initialStock, new DateTime(2014, 1, 5));
var exhaustionDate = plan.CalculateExhaustionDate(initialStock);
// assert
Assert.That(remaining, Is.EqualTo(new Stock(75, new DateTime(2014, 1, 5))));
Assert.That(exhaustionDate, Is.EqualTo(new DateTime(2014, 1, 19)));
}