public void Hierarchy_AddAlternative_Success()
{
//Arrange
var hierarchy = new Hierarchy();
hierarchy.GoalNode.AddCriterionNode("Criterion1");
hierarchy.GoalNode.CriterionNodes[0].AddSubcriterionNode("Criterion11");
hierarchy.GoalNode.AddCriterionNode("Criterion2");
hierarchy.GoalNode.AddCriterionNode("Criterion3");
var alternative1 = new Alternative("Alternative1");
var alternative2 = new Alternative("Alternative2");
var alternative3 = new Alternative("Alternative3");
//Act
hierarchy.AddAlternative(alternative1);
hierarchy.AddAlternative(alternative2);
hierarchy.AddAlternative(alternative3);
//Assert
foreach (var criterion in hierarchy.GetLowestCriterionNodes())
{
Assert.IsNotNull(criterion.AlternativeNodes[alternative1]);
Assert.IsNotNull(criterion.AlternativeNodes[alternative2]);
Assert.IsNotNull(criterion.AlternativeNodes[alternative3]);
}
}
public void Hierarchy_RefreshAlternativeNodes_AppendsAlternativeNodes()
{
//Arrange
var hierarchy = new Hierarchy();
var alternative1 = hierarchy.AddAlternative("Alternative1");
var alternative2 = hierarchy.AddAlternative("Alternative2");
var alternative3 = hierarchy.AddAlternative("Alternative3");
hierarchy.GoalNode.AddCriterionNode(new CriterionNode("Criterion1"));
hierarchy.GoalNode.AddCriterionNode(new CriterionNode("Criterion2"));
hierarchy.GoalNode.AddCriterionNode(new CriterionNode("Criterion3"));
var alternative4 = new Alternative("Alternative4");
var criterion11 = hierarchy.GoalNode.CriterionNodes[0].AddSubcriterionNode("Criterion11");
//Act
hierarchy.RefreshAlternativeNodes();
//Assert
foreach (var criterion in hierarchy.GetLowestCriterionNodes())
{
Assert.IsTrue(criterion.AlternativeNodes.Contains(alternative1));
Assert.IsTrue(criterion.AlternativeNodes.Contains(alternative2));
Assert.IsTrue(criterion.AlternativeNodes.Contains(alternative3));
}
}
public void Hierarchy_AddAlternativeTwice_ThrowsException()
{
//Arrange
var hiearachy = new Hierarchy();
var alternative1 = new Alternative("Alternative1");
Exception exception = null;
//Act
hiearachy.AddAlternative(alternative1);
try
{
hiearachy.AddAlternative(alternative1);
}
catch (Exception ex)
{
exception = ex;
}
//Assert
Assert.AreEqual(1, hiearachy.Alternatives.Count());
Assert.AreEqual(alternative1, hiearachy.Alternatives.ElementAt(0));
Assert.IsNotNull(exception);
Assert.IsInstanceOfType(exception, typeof(ArgumentException));
Assert.AreEqual("Same alternative can not be added twice.", exception.Message);
}
public void Hierarchy_RemoveAlternative_Success2()
{
//Arrange
var hierarchy = new Hierarchy();
hierarchy.GoalNode.AddCriterionNode(new CriterionNode("Criterion1"));
hierarchy.GoalNode.AddCriterionNode(new CriterionNode("Criterion2"));
hierarchy.GoalNode.AddCriterionNode(new CriterionNode("Criterion3"));
hierarchy.GoalNode.CriterionNodes.ElementAt(0).AddSubcriterionNode(new CriterionNode("Criterion11"));
var alternative1 = new Alternative("Alternative1");
var alternative2 = new Alternative("Alternative2");
var alternative3 = new Alternative("Alternative3");
//Act
hierarchy.AddAlternative(alternative1);
hierarchy.AddAlternative(alternative2);
hierarchy.AddAlternative(alternative3);
hierarchy.RemoveAlternative(alternative1);
//Assert
foreach (var criterion in hierarchy.GetLowestCriterionNodes())
{
Assert.IsFalse(criterion.AlternativeNodes.Contains(alternative1));
}
}
public void CriterionNode_SubcriterionNodes_Add_AddsWithFixUp()
{
//Arrange
var hierarchy = new Hierarchy();
hierarchy.AddAlternative(new Alternative("Alternative1"));
hierarchy.AddAlternative(new Alternative("Alternative2"));
var criterion = hierarchy.GoalNode.AddCriterionNode("Criterion");
var subcriterion = new CriterionNode();
//Act
criterion.AddSubcriterionNode(subcriterion);
//Assert
Assert.AreEqual(criterion, subcriterion.ParentCriterionNode);
Assert.AreEqual(0, criterion.AlternativeNodes.Count);
}
public void CriterionNode_AlternativeNodesCount_WithNodes_Returns1()
{
//Arrange => Act
var hierarchy = new Hierarchy();
hierarchy.AddAlternative(new Alternative("Alternative"));
var criterion = hierarchy.GoalNode.AddCriterionNode("Criterion");
//Assert
Assert.AreEqual(1, criterion.AlternativeNodes.Count);
}
public void AlternativeNode_GlobalPriority_ReturnsCorrectValue()
{
//Arrange => Act
var alternative1 = new Alternative();
var alternative2 = new Alternative();
var criterion = new CriterionNode("Criterion", 0.374M);
var hierarchy = new Hierarchy();
hierarchy.AddAlternative(alternative1);
hierarchy.AddAlternative(alternative2);
hierarchy.GoalNode.AddCriterionNode(criterion);
criterion.AlternativeNodes[alternative1].LocalPriority = 0.791M;
criterion.AlternativeNodes[alternative2].LocalPriority = 0.673M;
//Assert
Assert.AreEqual(0.791M * 0.374M, criterion.AlternativeNodes[alternative1].GlobalPriority);
Assert.AreEqual(0.673M * 0.374M, criterion.AlternativeNodes[alternative2].GlobalPriority);
}
public void Hierarchy_RemoveAlternative_Success()
{
//Arrange
var hiearachy = new Hierarchy();
var alternative = new Alternative("Alternative1");
//Act
hiearachy.AddAlternative(alternative);
hiearachy.RemoveAlternative(alternative);
//Assert
Assert.IsFalse(hiearachy.Alternatives.Contains(alternative));
}
public void Hierarchy_AddAlternative_IdAndName_Success()
{
//Arrange
var hiearachy = new Hierarchy();
//Act
var alternative = hiearachy.AddAlternative("ID123", "Alternative");
//Assert
Assert.AreEqual(1, hiearachy.Alternatives.Count());
Assert.AreEqual(alternative, hiearachy.Alternatives.ElementAt(0));
Assert.AreEqual("ID123", alternative.ID);
Assert.AreEqual("Alternative", alternative.Name);
}
public void HierarchyProcessor_Analyse_Calculates()
{
//This is sample hierarchy from Wikipedia article about AHP
//http://en.wikipedia.org/wiki/Analytic_Hierarchy_Process
//Arrange
var hierarchy = new Hierarchy("Choose optimal car");
var costCriterion = hierarchy.GoalNode.AddCriterionNode("Cost", 0.504M);
var safetyCriterion = hierarchy.GoalNode.AddCriterionNode("Safety", 0.237M);
var styleCriterion = hierarchy.GoalNode.AddCriterionNode("Style", 0.042M);
var capacityNode = hierarchy.GoalNode.AddCriterionNode("Capacity", 0.217M);
var purchasePriceCriterion = costCriterion.AddSubcriterionNode("Purchase price", 0.488M);
var fuelCostsCriterion = costCriterion.AddSubcriterionNode("Fuel costs", 0.251M);
var maintenanceCostsCriterion = costCriterion.AddSubcriterionNode("Maintenance costs", 0.100M);
var resaleValueCriterion = costCriterion.AddSubcriterionNode("Resale value", 0.161M);
var cargoCapacityCriterion = capacityNode.AddSubcriterionNode("Cargo capacity", 0.167M);
var passengerCapacityCriterion = capacityNode.AddSubcriterionNode("Passenger capacity", 0.833M);
var alternative1 = hierarchy.AddAlternative("Accord sedan");
var alternative2 = hierarchy.AddAlternative("Accord Hybrid");
var alternative3 = hierarchy.AddAlternative("Pilot CUV");
var alternative4 = hierarchy.AddAlternative("CR-V SUV");
var alternative5 = hierarchy.AddAlternative("Element SUV");
var alternative6 = hierarchy.AddAlternative("Odyssey Minivan");
#region Alternative node local priorities
purchasePriceCriterion.AlternativeNodes[alternative1].LocalPriority = 0.242M;
purchasePriceCriterion.AlternativeNodes[alternative2].LocalPriority = 0.027M;
purchasePriceCriterion.AlternativeNodes[alternative3].LocalPriority = 0.027M;
purchasePriceCriterion.AlternativeNodes[alternative4].LocalPriority = 0.242M;
purchasePriceCriterion.AlternativeNodes[alternative5].LocalPriority = 0.362M;
purchasePriceCriterion.AlternativeNodes[alternative6].LocalPriority = 0.100M;
fuelCostsCriterion.AlternativeNodes[alternative1].LocalPriority = 0.188M;
fuelCostsCriterion.AlternativeNodes[alternative2].LocalPriority = 0.212M;
fuelCostsCriterion.AlternativeNodes[alternative3].LocalPriority = 0.133M;
fuelCostsCriterion.AlternativeNodes[alternative4].LocalPriority = 0.160M;
fuelCostsCriterion.AlternativeNodes[alternative5].LocalPriority = 0.151M;
fuelCostsCriterion.AlternativeNodes[alternative6].LocalPriority = 0.156M;
maintenanceCostsCriterion.AlternativeNodes[alternative1].LocalPriority = 0.357M;
maintenanceCostsCriterion.AlternativeNodes[alternative2].LocalPriority = 0.312M;
maintenanceCostsCriterion.AlternativeNodes[alternative3].LocalPriority = 0.084M;
maintenanceCostsCriterion.AlternativeNodes[alternative4].LocalPriority = 0.100M;
maintenanceCostsCriterion.AlternativeNodes[alternative5].LocalPriority = 0.089M;
maintenanceCostsCriterion.AlternativeNodes[alternative6].LocalPriority = 0.058M;
resaleValueCriterion.AlternativeNodes[alternative1].LocalPriority = 0.225M;
resaleValueCriterion.AlternativeNodes[alternative2].LocalPriority = 0.095M;
resaleValueCriterion.AlternativeNodes[alternative3].LocalPriority = 0.055M;
resaleValueCriterion.AlternativeNodes[alternative4].LocalPriority = 0.415M;
resaleValueCriterion.AlternativeNodes[alternative5].LocalPriority = 0.105M;
resaleValueCriterion.AlternativeNodes[alternative6].LocalPriority = 0.105M;
safetyCriterion.AlternativeNodes[alternative1].LocalPriority = 0.215M;
safetyCriterion.AlternativeNodes[alternative2].LocalPriority = 0.215M;
safetyCriterion.AlternativeNodes[alternative3].LocalPriority = 0.083M;
safetyCriterion.AlternativeNodes[alternative4].LocalPriority = 0.038M;
safetyCriterion.AlternativeNodes[alternative5].LocalPriority = 0.025M;
safetyCriterion.AlternativeNodes[alternative6].LocalPriority = 0.424M;
styleCriterion.AlternativeNodes[alternative1].LocalPriority = 0.346M;
styleCriterion.AlternativeNodes[alternative2].LocalPriority = 0.346M;
styleCriterion.AlternativeNodes[alternative3].LocalPriority = 0.045M;
styleCriterion.AlternativeNodes[alternative4].LocalPriority = 0.160M;
styleCriterion.AlternativeNodes[alternative5].LocalPriority = 0.025M;
styleCriterion.AlternativeNodes[alternative6].LocalPriority = 0.078M;
cargoCapacityCriterion.AlternativeNodes[alternative1].LocalPriority = 0.090M;
cargoCapacityCriterion.AlternativeNodes[alternative2].LocalPriority = 0.090M;
cargoCapacityCriterion.AlternativeNodes[alternative3].LocalPriority = 0.170M;
cargoCapacityCriterion.AlternativeNodes[alternative4].LocalPriority = 0.170M;
cargoCapacityCriterion.AlternativeNodes[alternative5].LocalPriority = 0.170M;
cargoCapacityCriterion.AlternativeNodes[alternative6].LocalPriority = 0.310M;
passengerCapacityCriterion.AlternativeNodes[alternative1].LocalPriority = 0.136M;
passengerCapacityCriterion.AlternativeNodes[alternative2].LocalPriority = 0.136M;
passengerCapacityCriterion.AlternativeNodes[alternative3].LocalPriority = 0.273M;
passengerCapacityCriterion.AlternativeNodes[alternative4].LocalPriority = 0.136M;
passengerCapacityCriterion.AlternativeNodes[alternative5].LocalPriority = 0.046M;
passengerCapacityCriterion.AlternativeNodes[alternative6].LocalPriority = 0.273M;
#endregion
//Act
var processor = new HierarchyProcessor();
var result = processor.Analyse(hierarchy);
//Assert
Assert.AreEqual(0.212885342M, result[alternative1]);
Assert.AreEqual(0.150225038M, result[alternative2]);
Assert.AreEqual(0.109231639M, result[alternative3]);
Assert.AreEqual(0.164945910M, result[alternative4]);
Assert.AreEqual(0.142593084M, result[alternative5]);
Assert.AreEqual(0.220118987M, result[alternative6]);
}