public void TestRemovingAProductNotifesAllObservers()
{
ProductStock productStock = new ProductStock();
MockProductStockObserver mockProductStockObserverOne = new MockProductStockObserver();
MockProductStockObserver mockProductStockObserverTwo = new MockProductStockObserver();
productStock.RegisterObserver(mockProductStockObserverOne);
productStock.RegisterObserver(mockProductStockObserverTwo);
productStock.Remove(Products.Cola);
Assert.AreEqual(1, mockProductStockObserverOne.NumberOfTimesProductStockUpdatedWasCalled);
Assert.AreEqual(Products.Cola, mockProductStockObserverOne.LastProductPassedToProductStockUpdated);
Assert.AreEqual(1, mockProductStockObserverTwo.NumberOfTimesProductStockUpdatedWasCalled);
Assert.AreEqual(Products.Cola, mockProductStockObserverTwo.LastProductPassedToProductStockUpdated);
productStock.Remove(Products.Candy);
Assert.AreEqual(2, mockProductStockObserverOne.NumberOfTimesProductStockUpdatedWasCalled);
Assert.AreEqual(Products.Candy, mockProductStockObserverOne.LastProductPassedToProductStockUpdated);
Assert.AreEqual(2, mockProductStockObserverTwo.NumberOfTimesProductStockUpdatedWasCalled);
Assert.AreEqual(Products.Candy, mockProductStockObserverTwo.LastProductPassedToProductStockUpdated);
}
public void RemoveMethod_RemovesProductIfExists(string label)
{
productStock.Add(new Product("exists", 2.2m, 3));
productStock.Add(new Product("exists2", 12.2m, 23));
productStock.Add(new Product("exists3", 22.2m, 33));
productStock.Add(new Product("exists4", 2.2m, 7));
Assert.That(productStock.Count == 4);
var productToRemove = new Product(label, 2.2m, 3);
Assert.IsTrue(productStock.Remove(productToRemove));
Assert.AreEqual(productStock.Count, 3);
}
public void TestRemovingACandyDecrementsCountForCandyOnly()
{
ProductStock productStock = new ProductStock();
productStock.Remove(Products.Candy);
Assert.AreEqual(4, productStock.Count(Products.Candy));
Assert.AreEqual(5, productStock.Count(Products.Cola));
Assert.AreEqual(5, productStock.Count(Products.Chips));
productStock.Remove(Products.Candy);
Assert.AreEqual(3, productStock.Count(Products.Candy));
Assert.AreEqual(5, productStock.Count(Products.Cola));
Assert.AreEqual(5, productStock.Count(Products.Chips));
}
public void ProductStock_RemoveMethodReturnsFalse()
{
var stock = new ProductStock();
stock.Add(new Product("SSD", 12.4m, 3));
stock.Add(new Product("CPU", 16.5m, 3));
stock.Add(new Product("HDD", 20.7m, 3));
stock.Add(new Product("RAM", 14.9m, 3));
Assert.IsFalse(stock.Remove(new Product("GPU", 12.4m, 3)));
}
public void TestCountCantGoBelowZero()
{
ProductStock productStock = new ProductStock();
int originalCountAndMore = productStock.Count(Products.Cola) + 3;
for (int i = 0; i < originalCountAndMore; i++)
{
productStock.Remove(Products.Cola);
Assert.GreaterOrEqual(productStock.Count(Products.Cola), 0);
}
}
public void TestHandlesUnknownProductsGracefully()
{
MockProduct mockProduct = new MockProduct();
ProductStock productStock = new ProductStock();
MockProductStockObserver mockProductStockObserver = new MockProductStockObserver();
productStock.RegisterObserver(mockProductStockObserver);
productStock.Remove(mockProduct);
Assert.AreEqual(0, productStock.Count(mockProduct));
Assert.AreEqual(0, mockProductStockObserver.NumberOfTimesProductStockUpdatedWasCalled);
}
public void ProductStock_RemoveMethodReturnsTrue()
{
var stock = new ProductStock();
stock.Add(new Product("SSD", 12.4m, 3));
stock.Add(new Product("CPU", 16.5m, 3));
stock.Add(new Product("HDD", 20.7m, 3));
stock.Add(new Product("RAM", 14.9m, 3));
Assert.IsTrue(stock.Remove(new Product("SSD", 12.4m, 3)));
Assert.AreEqual(stock[0].Quantity, 0);
}
public void Remove_NonExistingProductShouldReturnFalse()
{
Assert.IsFalse(productStock.Remove(product));
}