public void InventorySpaceLowerBound_ConstantInjectWithdrawRate_EqualsNextPeriodInventoryMinusMaxInjectRateAdjustedForLoss()
{
const double maxInjectionRate = 56.8;
const double maxWithdrawalRate = 47.12;
var injectWithdrawRange = new InjectWithdrawRange(-maxWithdrawalRate, maxInjectionRate);
const double inventoryPercentLoss = 0.03;
const double minInventory = 0.0;
const double maxInventory = 1000.0;
var injectWithdrawalRanges = new List <InjectWithdrawRangeByInventory>
{
(inventory : 0.0, injectWithdrawRange),
(inventory : 100.0, injectWithdrawRange),
(inventory : 300.0, injectWithdrawRange),
(inventory : 600.0, injectWithdrawRange),
(inventory : 800.0, injectWithdrawRange),
(inventory : 1000.0, injectWithdrawRange),
};
var stepInjectWithdrawConstraint = new StepInjectWithdrawConstraint(injectWithdrawalRanges);
const double nextPeriodMinInventory = 620.0;
const double nextPeriodMaxInventory = 870.0;
double thisPeriodMinInventory = stepInjectWithdrawConstraint.InventorySpaceLowerBound(nextPeriodMinInventory, nextPeriodMaxInventory, minInventory, maxInventory, inventoryPercentLoss);
const double expectedThisPeriodMinInventory = (nextPeriodMinInventory - maxInjectionRate) / (1 - inventoryPercentLoss);
Assert.Equal(expectedThisPeriodMinInventory, thisPeriodMinInventory, 12);
}
public void InventorySpaceLowerBound_InventoryDependentInjectWithdrawRate_ConsistentWithGetInjectWithdrawRange()
{
const double inventoryPercentLoss = 0.03;
const double minInventory = 0.0;
const double maxInventory = 1000.0;
const double nextPeriodMinInventory = 552.0;
const double nextPeriodMaxInventory = 734.0;
double thisPeriodMinInventory = _stepConstraint.InventorySpaceLowerBound(nextPeriodMinInventory, nextPeriodMaxInventory, minInventory, maxInventory, inventoryPercentLoss);
double thisPeriodMaxInjectRateAtInventory = _stepConstraint.GetInjectWithdrawRange(thisPeriodMinInventory).MaxInjectWithdrawRate;
double derivedNextPeriodMinInventory = thisPeriodMinInventory * (1 - inventoryPercentLoss) + thisPeriodMaxInjectRateAtInventory;
Assert.Equal(nextPeriodMinInventory, derivedNextPeriodMinInventory, 12);
}