public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
{
JObject jo = JObject.Load(reader);
IDeprecationRule deprecationRule = null;
switch (jo["RuleType"].ToString())
{
case var decreasingRuleType when decreasingRuleType == nameof(DecreasingDeprecationRule):
deprecationRule = new DecreasingDeprecationRule();
break;
case var increasingRuleType when increasingRuleType == nameof(IncreasingDeprecationRule):
deprecationRule = new IncreasingDeprecationRule();
break;
case var zeroRuleType when zeroRuleType == nameof(ZeroDeprecationRule):
deprecationRule = new ZeroDeprecationRule();
break;
}
if (deprecationRule != null)
{
serializer.Populate(jo.CreateReader(), deprecationRule);
}
// If the JSON doesn't contain a value for "FirstApplicableDay" assume it is essentially ongoing.
if (jo["FirstApplicableDay"] == null)
{
deprecationRule.FirstApplicableDay = int.MaxValue;
}
return(deprecationRule);
}
public void NoChangeWhenSellInIsGreaterThanFirstApplicableDay()
{
var testRule = new IncreasingDeprecationRule
{
FirstApplicableDay = 2,
Amount = 2
};
var testStock = new StockItem
{
StockTypeId = "Stock 1",
SellIn = 3,
Quality = 5
};
var service = new IncreasingDeprecationRuleService();
var result = service.RunRule(testRule, testStock);
Assert.False(result);
Assert.Equal(5, testStock.Quality);
}
public void IncreasesQualityWhenSellInIsEqualLastApplicableDay()
{
var testRule = new IncreasingDeprecationRule
{
FirstApplicableDay = 3,
Amount = 2
};
var testStock = new StockItem
{
StockTypeId = "Stock 1",
SellIn = 3,
Quality = 5
};
var service = new IncreasingDeprecationRuleService();
var result = service.RunRule(testRule, testStock);
Assert.True(result);
Assert.Equal(7, testStock.Quality);
}
