docs/csharp/whats-new/tutorials/snippets/pattern-objects/Program.cs - main - aprogrammer/dotnet-docs

docs/csharp/whats-new/tutorials/snippets/pattern-objects/Program.cs
106 строк4 KB
Tom Dykstra
Update snippets for NRT (#28622)
11 мар 2022, 19:03
11 мар 2022, 19:0313fe3ed
namespace pattern_objects;

class Program
{
    static void Main(string[] args)
    {
        // <HappyTests>
        // Create a new canal lock:
        var canalGate = new CanalLock();

        // State should be doors closed, water level low:
        Console.WriteLine(canalGate);

        canalGate.SetLowGate(open: true);
        Console.WriteLine($"Open the lower gate:  {canalGate}");

        Console.WriteLine("Boat enters lock from lower gate");

        canalGate.SetLowGate(open: false);
        Console.WriteLine($"Close the lower gate:  {canalGate}");

        canalGate.SetWaterLevel(WaterLevel.High);
        Console.WriteLine($"Raise the water level: {canalGate}");

        canalGate.SetHighGate(open: true);
        Console.WriteLine($"Open the higher gate:  {canalGate}");

        Console.WriteLine("Boat exits lock at upper gate");
        Console.WriteLine("Boat enters lock from upper gate");

        canalGate.SetHighGate(open: false);
        Console.WriteLine($"Close the higher gate: {canalGate}");

        canalGate.SetWaterLevel(WaterLevel.Low);
        Console.WriteLine($"Lower the water level: {canalGate}");

        canalGate.SetLowGate(open: true);
        Console.WriteLine($"Open the lower gate:  {canalGate}");

        Console.WriteLine("Boat exits lock at upper gate");

        canalGate.SetLowGate(open: false);
        Console.WriteLine($"Close the lower gate:  {canalGate}");
        // </HappyTests>

        // Failure tests:
        // <HighGateSafetyTest>
        Console.WriteLine("=============================================");
        Console.WriteLine("     Test invalid commands");
        // Open "wrong" gate (2 tests)
        try
        {
            canalGate = new CanalLock();
            canalGate.SetHighGate(open: true);
        }
        catch (InvalidOperationException)
        {
            Console.WriteLine("Invalid operation: Can't open the high gate. Water is low.");
        }
        Console.WriteLine($"Try to open upper gate: {canalGate}");
        // </HighGateSafetyTest>
        // <FinalTestCode>
        Console.WriteLine();
        Console.WriteLine();
        try
        {
            canalGate = new CanalLock();
            canalGate.SetWaterLevel(WaterLevel.High);
            canalGate.SetLowGate(open: true);
        }
        catch (InvalidOperationException)
        {
            Console.WriteLine("invalid operation: Can't open the lower gate. Water is high.");
        }
        Console.WriteLine($"Try to open lower gate: {canalGate}");
        // change water level with gate open (2 tests)
        Console.WriteLine();
        Console.WriteLine();
        try
        {
            canalGate = new CanalLock();
            canalGate.SetLowGate(open: true);
            canalGate.SetWaterLevel(WaterLevel.High);
        }
        catch (InvalidOperationException)
        {
            Console.WriteLine("invalid operation: Can't raise water when the lower gate is open.");
        }
        Console.WriteLine($"Try to raise water with lower gate open: {canalGate}");
        Console.WriteLine();
        Console.WriteLine();
        try
        {
            canalGate = new CanalLock();
            canalGate.SetWaterLevel(WaterLevel.High);
            canalGate.SetHighGate(open: true);
            canalGate.SetWaterLevel(WaterLevel.Low);
        }
        catch (InvalidOperationException)
        {
            Console.WriteLine("invalid operation: Can't lower water when the high gate is open.");
        }
        Console.WriteLine($"Try to lower water with high gate open: {canalGate}");
        // </FinalTestCode>
    }
}