public void TestDiscountEngine_DiscountStrategiesCalled()
{
var discountEngine = new DiscountEngine(_marketingCampaignMock, _discountEngineStrategy);
var item = NSubstitute.Substitute.For <IItem>();
discountEngine.ApplyDiscountFor(item);
_discountEngineStrategy.Received(1).GetDiscountStrategy(item.Price, _marketingCampaignMock);
var itemDiscountStrategy = _discountEngineStrategy.Received(1).GetDiscountStrategy(item.Price, _marketingCampaignMock);
item.Received(1).ApplyStrategy(itemDiscountStrategy);
}
public void TestForItem_NoReduction()
{
var item = new ItemBuilder()
.WithName("supplement d3")
.WithPrice(80)
.Build();
var pairDateTime = new AppDateTime
{
Now = new DateTime(2020, 7, 13)
};
var discountEngine = new DiscountEngine(new MarketingCampaign(pairDateTime));
discountEngine.ApplyDiscountFor(item);
Assert.True(item.Price.Equals(new Money(80) % NoDiscountStrategy.Percentage));
}
public void TestForItem_10pReduction()
{
var item = new ItemBuilder()
.WithName("spaghetti")
.WithPrice(1500)
.Build();
var aMonday = new AppDateTime
{
Now = new DateTime(2020, 7, 13)
};
var discountEngine = new DiscountEngine(new MarketingCampaign(aMonday));
discountEngine.ApplyDiscountFor(item);
Assert.True(item.Price.Equals(new Money(1500) % SecondTierDiscountStrategy.Percentage));
}
public void TestForItem_5pReduction()
{
var item = new ItemBuilder()
.WithName("sauce tomate")
.WithPrice(210)
.Build();
var pairDateTime = new AppDateTime
{
Now = new DateTime(2020, 7, 9, 3, 57, 32, 12)
};
var discountEngine = new DiscountEngine(new MarketingCampaign(pairDateTime));
discountEngine.ApplyDiscountFor(item);
Assert.True(item.Price.Equals(new Money(210) % ThirdTierDiscountStrategy.Percentage));
}
public void TestForItem_15pReduction()
{
var item = new ItemBuilder()
.WithName("les pattes")
.WithPrice(100)
.Build();
var aFriday = new AppDateTime
{
Now = new DateTime(2020, 7, 10)
};
var discountEngine = new DiscountEngine(new MarketingCampaign(aFriday));
discountEngine.ApplyDiscountFor(item);
Assert.True(item.Price.Equals(new Money(100) % FirstTierDiscountStrategy.Percentage));
}