public void GivenCyclicDependency_FiresUpdateFailedEvent()
{
//Arrange
bool eventFired = false;
var alfa = new Alfa();
var beta = new Beta(alfa);
var nodeA = new PropertyNode(nameof(alfa.A), alfa);
var nodeB = new PropertyNode(nameof(alfa.B), alfa);
var nodeD = new PropertyNode(nameof(beta.D), beta);
var reactor = new Reactor("R1");
reactor.CreateDependency(nodeA, nodeB);
reactor.CreateDependency(nodeB, nodeD);
reactor.CreateDependency(nodeD, nodeA);
reactor.UpdateFailed += delegate
{
eventFired = true;
};
//Act
reactor.PerformUpdate();
//Assert
Assert.IsTrue(eventFired);
}
public void CreateDependency_GivenPredecessorAndSuccessorAreSame_ThrowsException()
{
//Arrange
var obj = new Alfa();
var node = new PropertyNode(nameof(obj.A), obj);
var reactor = new Reactor("R1");
//Act
reactor.CreateDependency(node, node);
}
public void UpdateFailed_NoSubscribers_DoesntFireEvent()
{
//Arrange
bool eventFired = false;
var alfa = new AlfaException();
var nodeA = new PropertyNode(nameof(alfa.A), alfa);
var nodeB = new PropertyNode(nameof(alfa.B), alfa);
var reactor = new Reactor("R1");
reactor.CreateDependency(nodeA, nodeB);
//Act
reactor.PerformUpdate();
//Assert
Assert.IsFalse(eventFired);
}
public void PerformUpdate_GivenCompleteUpdateRequested_PerformsCorrectUpdate()
{
//Arrange
var alfa = new Alfa();
var beta = new Beta(alfa);
var gama = new Gama(alfa, beta);
var nodeA = new PropertyNode(nameof(alfa.A), alfa);
var nodeB = new PropertyNode(nameof(alfa.B), alfa);
var nodeC = new PropertyNode(nameof(beta.C), beta);
var nodeD = new PropertyNode(nameof(beta.D), beta);
var nodeE = new PropertyNode(nameof(gama.E), gama);
var nodeF = new PropertyNode(nameof(gama.F), gama);
var reactor = new Reactor("R1");
reactor.CreateDependency(nodeA, nodeE);
reactor.CreateDependency(nodeA, nodeB);
reactor.CreateDependency(nodeA, nodeD);
reactor.CreateDependency(nodeC, nodeD);
reactor.CreateDependency(nodeB, nodeE);
reactor.CreateDependency(nodeB, nodeF);
reactor.CreateDependency(nodeD, nodeF);
reactor.CreateDependency(nodeE, nodeF);
//Act
reactor.PerformUpdate();
//Assert
var updateLog = reactor.LastUpdateLog;
int indexA = updateLog.IndexOf(nodeA);
int indexB = updateLog.IndexOf(nodeB);
int indexC = updateLog.IndexOf(nodeC);
int indexD = updateLog.IndexOf(nodeD);
int indexE = updateLog.IndexOf(nodeE);
int indexF = updateLog.IndexOf(nodeF);
Assert.IsTrue(updateLog.Count == 6);
Assert.IsTrue(indexF > indexB && indexF > indexD && indexF > indexE);
Assert.IsTrue(indexE > indexB && indexE > indexA);
Assert.IsTrue(indexB > indexA);
Assert.IsTrue(indexD > indexA && indexD > indexC);
}
public void RemoveDependency_GivenValidDependency_DependencyRemoved()
{
//Arrange
var obj = new Alfa();
var nodeA = new PropertyNode(nameof(obj.A), obj);
var nodeB = new PropertyNode(nameof(obj.B), obj);
var reactor = new Reactor("R1");
reactor.CreateDependency(nodeA, nodeB);
//Act
reactor.RemoveDependency(nodeA, nodeB);
//Assert
var predecessor = reactor.GetNode(nodeA.Identifier);
var successor = reactor.GetNode(nodeB.Identifier);
Assert.IsTrue(predecessor.Successors.Contains(successor) == false &&
successor.Predecessors.Contains(predecessor) == false);
}
public void CreateDependency_GivenValidPredecessorAndSuccessor_DependencyCreated()
{
//Arrange
var obj = new Alfa();
var nodeA = new PropertyNode(nameof(obj.A), obj);
var nodeB = new PropertyNode(nameof(obj.B), obj);
var reactor = new Reactor("R1");
//Act
reactor.CreateDependency(nodeA, nodeB);
//Assert
var predecessor = reactor.GetNode(nodeA.Identifier);
var successor = reactor.GetNode(nodeB.Identifier);
Assert.IsTrue(predecessor != null &&
successor != null &&
predecessor.Successors.Contains(successor) &&
successor.Predecessors.Contains(predecessor));
}
public void GivenUpdateFails1_FiresUpdateFailedEvent()
{
//Arrange
bool eventFired = false;
var alfa = new AlfaException();
var nodeA = new PropertyNode(nameof(alfa.A), alfa);
var nodeB = new PropertyNode(nameof(alfa.B), alfa);
var reactor = new Reactor("R1");
reactor.CreateDependency(nodeA, nodeB);
reactor.UpdateFailed += delegate
{
eventFired = true;
};
//Act
reactor.PerformUpdate(nodeA);
//Assert
Assert.IsTrue(eventFired);
}