public void WhenApplicationWithErrorsThenExceptionsListReportsFaultyRules()
{
var testContext = new TestContext();
var pipeline = new FaultTolerantPromotionPipeline();
var ruleA = new PromotionRuleA();
var ruleB = new FaultyPromotionRule();
var ruleC = new PromotionRuleA();
var ruleD = new FaultyPromotionRule();
pipeline.AddRule(ruleA);
pipeline.AddRule(ruleB);
pipeline.AddRule(ruleC);
pipeline.AddRule(ruleD);
ICart cart = pipeline.Apply(testContext.CartFactory.Create());
Assert.NotNull(cart);
Assert.NotEmpty(pipeline.LastApplyExceptions);
Assert.Collection(pipeline.LastApplyExceptions,
errorEntry =>
{
Assert.True((object)errorEntry.Item1 == (object)ruleB);
Assert.IsType <TestException>(errorEntry.Item2);
},
errorEntry =>
{
Assert.True((object)errorEntry.Item1 == (object)ruleD);
Assert.IsType <TestException>(errorEntry.Item2);
});
}
public void PairOfDifferentSkusForRule_Two()
{
var testContext = new TestContext();
var skuA = testContext.CreateNewSku("A", 100);
var skuB = testContext.CreateNewSku("B", 200);
var skuC = testContext.CreateNewSku("C", 300);
var skuD = testContext.CreateNewSku("D", 400);
var cart = testContext.CartFactory.Create();
cart.Add(skuA, 2);
cart.Add(skuB, 3);
cart.Add(skuC, 2);
cart.Add(skuD, 3);
cart.TestTotal(2 * 100 + 3 * 200 + 2 * 300 + 3 * 400);
var pipeline = new FaultTolerantPromotionPipeline();
pipeline.AddRule(new PairOfDifferentSkusForRule(testContext.CartFactory, skuA, skuB, 100));
pipeline.AddRule(new PairOfDifferentSkusForRule(testContext.CartFactory, skuC, skuD, 200));
var newCart = pipeline.Apply(cart);
newCart.TestTotal(2 * 100 + 1 * 200 + 2 * 200 + 1 * 400);
}
public void WhenNoRulesThenExceptionsListIsEmpty()
{
var testContext = new TestContext();
var pipeline = new FaultTolerantPromotionPipeline();
ICart cart = pipeline.Apply(testContext.CartFactory.Create());
Assert.NotNull(cart);
Assert.Empty(pipeline.LastApplyExceptions);
}
public void WhenApplicationWithErrorsThenExceptionsListIsNotEmpty()
{
var testContext = new TestContext();
var pipeline = new FaultTolerantPromotionPipeline();
pipeline.AddRule(new PromotionRuleA());
pipeline.AddRule(new FaultyPromotionRule());
ICart cart = pipeline.Apply(testContext.CartFactory.Create());
Assert.NotNull(cart);
Assert.NotEmpty(pipeline.LastApplyExceptions);
}
CreateTestFullContext(TestContext testContext)
{
var skuA = testContext.CreateNewSku("A", skuAUnitPrice);
var skuB = testContext.CreateNewSku("B", skuBUnitPrice);
var skuC = testContext.CreateNewSku("C", skuCUnitPrice);
var skuD = testContext.CreateNewSku("D", skuDUnitPrice);
var pipeline = new FaultTolerantPromotionPipeline();
pipeline.AddRule(new CollectionOfSameSkuForRule(testContext.CartFactory, skuA, 3, rule1BatchPrice));
pipeline.AddRule(new CollectionOfSameSkuForRule(testContext.CartFactory, skuB, 2, rule2BatchPrice));
pipeline.AddRule(new PairOfDifferentSkusForRule(testContext.CartFactory, skuC, skuD, rule3BatchPrice));
return(pipeline, skuA, skuB, skuC, skuD);
}
/// <inheritdoc/>
public IPromotionPipeline Create()
{
var pipeline = new FaultTolerantPromotionPipeline();
foreach (var promotionRuleOption in this.promotionRuleOptions)
{
var promotionRule = this.CreateRule(promotionRuleOption);
if (promotionRule == null)
{
throw new InvalidOperationException($"No promotion rule corresponding to '{promotionRuleOption.Id}'");
}
pipeline.AddRule(promotionRule);
}
return(pipeline);
}
public void WhenAllRulesFailThenReturnedCartIsTheSameAsOriginal()
{
var testContext = new TestContext();
var pipeline = new FaultTolerantPromotionPipeline();
var ruleA = new FaultyPromotionRule();
var ruleB = new FaultyPromotionRule();
pipeline.AddRule(ruleA);
pipeline.AddRule(ruleB);
ICart originalCart = testContext.CartFactory.Create();
ICart newCart = pipeline.Apply(originalCart);
Assert.NotNull(newCart);
Assert.True((object)newCart == (object)originalCart);
}
public void CollectionOfSameSkuForRule_Two()
{
var testContext = new TestContext();
var skuA = testContext.CreateNewSku("A", 100);
var skuB = testContext.CreateNewSku("B", 200);
var cart = testContext.CartFactory.Create();
cart.Add(skuA, 2);
cart.Add(skuB, 3);
cart.TestTotal(2 * 100 + 3 * 200);
var pipeline = new FaultTolerantPromotionPipeline();
pipeline.AddRule(new CollectionOfSameSkuForRule(testContext.CartFactory, skuA, 2, 50));
pipeline.AddRule(new CollectionOfSameSkuForRule(testContext.CartFactory, skuB, 2, 100));
var newCart = pipeline.Apply(cart);
newCart.TestTotal(1 * 50 + 1 * 100 + 200);
}
public void WhenPreviousRuleFaultsThenNextRulesActionIsPreserved()
{
var testContext = new TestContext();
var pipeline = new FaultTolerantPromotionPipeline();
var sku = testContext.CreateNewSku("S", 0);
var ruleA = new FaultyPromotionRule();
var ruleB = new SideEffectsPromotionRule(sku);
pipeline.AddRule(ruleA);
pipeline.AddRule(ruleB);
ICart cart = pipeline.Apply(testContext.CartFactory.Create());
Assert.NotNull(cart);
Assert.NotEmpty(pipeline.LastApplyExceptions);
Assert.Collection(cart, entry =>
{
Assert.True((object)entry.Sku == (object)sku);
});
}