public void Validate_TwoChainedHandlers_LogLengthIsTwo()
{
var node1 = new ValidationHandlerNode(new AlwaysPassesValidationHandler());
var node2 = new ValidationHandlerNode(new AlwaysPassesValidationHandler());
node1.Successor = node2;
node1.Validate("");
Assert.AreEqual(2, log.Length);
}
public void Validate_ThreeChainedHanldersMiddleFails_LogLengthIsTwo()
{
var node1 = new ValidationHandlerNode(new AlwaysPassesValidationHandler());
var node2 = new ValidationHandlerNode(new AlwaysFailsValidationHandler());
var node3 = new ValidationHandlerNode(new AlwaysPassesValidationHandler());
node1.Successor = node2;
node2.Successor = node3;
node1.Validate("");
Assert.AreEqual(2, log.Length);
Assert.AreEqual("TF", log);
}
public void Validate_TwoChainedHanldersFirstFails_LogLengthIsOne()
{
var node1 = new ValidationHandlerNode(new AlwaysFailsValidationHandler());
var node2 = new ValidationHandlerNode(new AlwaysPassesValidationHandler());
node1.Successor = node2;
node1.Validate("");
Assert.AreEqual(1, log.Length);
Assert.AreEqual("F", log);
}
public void Validate_ThreeChainedHanldersAllPass_LogLengthIsThree()
{
var node1 = new ValidationHandlerNode(new AlwaysPassesValidationHandler());
var node2 = new ValidationHandlerNode(new AlwaysPassesValidationHandler());
var node3 = new ValidationHandlerNode(new AlwaysPassesValidationHandler());
node1.Successor = node2;
node2.Successor = node3;
bool result = node1.Validate("");
Assert.AreEqual(3, log.Length);
Assert.AreEqual("TTT", log);
Assert.IsTrue(result);
}
