public void RefactoredCodeProducesSameResultAsOriginalCode(int age, int weight, int height, double avgHealthPoints)
{
// Arrange
var oldDsfHandler = new OldDsfHandler(new SettingsRepo());
var actualRequest = new DsfRequest(age, weight, height, avgHealthPoints, "", "", "", "");
var handler = new CheckBmiRule();
handler.SetNext(new CheckAgeRule())
.SetNext(new CheckAvgHealthPointsRule())
.SetNext(new CalculateDsfFactorRule())
.SetNext(new CheckAgainstMaxDsfFactorRule())
.SetNext(new CheckAgainstMinDsfFactorRule());
// Act
var expectedDsfValue = oldDsfHandler.GetDecisionSupportFactor(age, weight, height, avgHealthPoints);
handler.Handle(actualRequest);
// Assert
Assert.Equal(expectedDsfValue, actualRequest.DsfFactor);
}
private static void RunRefactoredImplementation()
{
Console.WriteLine("Running refactored implementation");
var settingsRepo = new SettingsRepo();
var age = 36;
var weight = 70;
var height = 170;
var avgHealthPoints = 7.4;
var minAgeSetting = settingsRepo.GetSettingAsString("minAge");
var factorSetting = settingsRepo.GetSettingAsString("factor");
var maxDsFactorSetting = settingsRepo.GetSettingAsString("maxDsFactor");
var minDsFactorSetting = settingsRepo.GetSettingAsString("minDsFactor");
var request = new DsfRequest(age,
weight,
height,
avgHealthPoints,
minAgeSetting,
factorSetting,
maxDsFactorSetting,
minDsFactorSetting);
var handler = new CheckBmiRule();
handler.SetNext(new CheckAgeRule())
.SetNext(new CheckAvgHealthPointsRule())
.SetNext(new CalculateDsfFactorRule())
.SetNext(new CheckAgainstMaxDsfFactorRule())
.SetNext(new CheckAgainstMinDsfFactorRule());
handler.Handle(request);
Console.WriteLine($"Decision support factor: {request.DsfFactor}");
}