C# (CSharp) PricingManager.AddObserver示例

示例#1

文件： PricingManagerTests.cs 项目： wcope80/DesignPatterns

        public void RemoveObserverRemovesObserver()
        {
            //Arrange
            PricingManager   manager  = new PricingManager();
            FuelPriceDisplay display  = new FuelPriceDisplay(manager);
            Terminal         terminal = new Terminal(manager);

            //Act
            manager.AddObserver(display);
            manager.AddObserver(terminal);
            manager.RemoveObserver(display);
            //Assert
            Assert.AreEqual(1, manager.Observers.Count);
        }

示例#2

文件： PricingManagerTests.cs 项目： wcope80/DesignPatterns

        public void AddObserverAddsObserver()
        {
            //Arrange
            PricingManager   manager = new PricingManager();
            FuelPriceDisplay display = new FuelPriceDisplay(manager);

            //Act
            manager.AddObserver(display);
            //Assert
            Assert.AreEqual(1, manager.Observers.Count);
        }

示例#3

文件： TerminalTests.cs 项目： wcope80/DesignPatterns

        public void GetsNotifiedonFuelPriceChange()
        {
            //Arrange
            PricingManager manager  = new PricingManager();
            Terminal       terminal = new Terminal(manager);

            manager.AddObserver(terminal);
            //Act
            manager.UpdateFuelPrice(1.78);
            //Assert
            Assert.AreEqual(1.78, terminal.FuelPrice);
        }

示例#4

        public void GetsNotifiedonFuelPriceChange()
        {
            //Arrange
            PricingManager   manager = new PricingManager();
            FuelPriceDisplay display = new FuelPriceDisplay(manager);

            manager.AddObserver(display);
            //Act
            manager.UpdateFuelPrice(1.78);
            //Assert
            Assert.AreEqual(1.78, display.FuelPrice);
        }