ServiceManagerTests.cs

using MathCore.IoC;
using MathCore.IoC.ServiceRegistrations;

// ReSharper disable UnusedMember.Global
// ReSharper disable UnusedType.Local
// ReSharper disable UnusedMember.Local
// ReSharper disable MemberCanBePrivate.Local

namespace MathCore.Tests.IoC;

/// <summary>Тест контейнера инверсии управления</summary>
[TestClass]
public class ServiceManagerTests
{
    #region Тестовые сервисы

    private interface IService
    {
        int GetValue();
    }

    private interface IService2
    {
        int Value { get; }
    }

    private class Service_42 : IService
    {
        public int GetValue() => 42;
    }

    private class Service_GetHashCode : IService
    {
        public int GetValue() => GetHashCode();
    }

    private class Service_GetThreadId : IService
    {
        private readonly int _ThreadId = Thread.CurrentThread.ManagedThreadId;

        public int GetValue() => _ThreadId;
    }

    private class Service_GetTaskId : IService
    {
        private readonly int _TaskId = Task.CurrentId ?? -1;

        public int GetValue() => _TaskId;
    }

    private class Service_Value(int value) : IService
    {
        public int GetValue() => value;
    }

    private class Service_TwoInterfaces(int value) : IService, IService2
    {
        public Service_TwoInterfaces() : this(15) { }

        int IService.GetValue() => value;

        int IService2.Value => value;
    }

    private class Service_ThrowException<TException> : IService
        where TException : Exception, new()
    {
        public int GetValue() => throw new TException();
    }


    #endregion

    [TestMethod]
    public void DefaultManager()
    {
        var expected = ServiceManager.Default;
        var actual = ServiceManager.Default;

        Assert.IsNotNull(expected);
        Assert.IsNotNull(actual);

        Assert.AreEqual(expected, actual);
    }

    [TestMethod]
    public void TypeIndexator()
    {
        var service_manager = new ServiceManager();
        service_manager.Register<IService, Service_42>();
        var expected1 = service_manager.Get<IService>();
        var expected2 = service_manager.Get<IService>();

        var actual = service_manager[typeof(IService)];

        Assert.IsNotNull(expected1);
        Assert.IsNotNull(expected2);

        Assert.AreEqual(expected1, actual);
        Assert.AreEqual(expected2, actual);

        Assert.IsInstanceOfType<IService>(actual);
        Assert.IsInstanceOfType<Service_42>(actual);
    }

    [TestMethod]
    public void ServiceRegistration_Default_Simple()
    {
        var service_manager = new ServiceManager();

        service_manager.Register<Service_42>();

        var service = service_manager.Get<Service_42>();

        Assert.IsNotNull(service);
    }

    /// <summary>Тестирование регистрации сервиса</summary>
    [TestMethod]
    public void ServiceRegistration_Default_Singleton()
    {
        var service_manager = new ServiceManager();

        service_manager.Register<IService, Service_42>();

        var service = service_manager.Get<IService>();
        Assert.IsNotNull(service);
        Assert.IsInstanceOfType<IService>(service);
        Assert.IsInstanceOfType<Service_42>(service);

        var actual = service.GetValue();
        const int expected = 42;
        Assert.AreEqual(expected, actual);
    }

    [TestMethod]
    public void ServiceRegistration_Singleton_Factory()
    {
        var service_manager = new ServiceManager();
        service_manager.Register<IService>(() => new Service_Value(13));

        var instance1 = service_manager.Get<IService>();
        var instance2 = service_manager.Get<IService>();

        Assert.IsTrue(ReferenceEquals(instance1, instance2));
        Assert.AreEqual(instance1, instance2);
    }

    [TestMethod]
    public void ServiceRegistration_SingleCall_Factory()
    {
        var service_manager = new ServiceManager();

        var counter = 0;
        service_manager.Register<IService>(() => new Service_Value(++counter), ServiceRegistrationMode.SingleCall);

        var service = service_manager.Get<IService>();
        Assert.IsNotNull(service);
        Assert.IsInstanceOfType<IService>(service);
        Assert.IsInstanceOfType<Service_Value>(service);

        var actual = service.GetValue();
        var expected = counter;
        Assert.AreEqual(expected, actual);

        service = service_manager.Get<IService>();
        Assert.IsNotNull(service);
        Assert.IsInstanceOfType<IService>(service);
        Assert.IsInstanceOfType<Service_Value>(service);

        actual = service.GetValue();
        expected = counter;
        Assert.AreEqual(expected, actual);
    }

    [TestMethod]
    public void ServiceRegistration_SingleCall()
    {
        var service_manager = new ServiceManager();
        service_manager.RegisterSingleCall<IService, Service_GetHashCode>();

        var instance1 = service_manager.Get<IService>();
        var instance2 = service_manager.Get<IService>();

        Assert.IsFalse(ReferenceEquals(instance1, instance2));
        Assert.AreNotEqual(instance1, instance2);
    }

    [TestMethod]
    public void ServiceRegistration_SingleCall_Simple()
    {
        var service_manager = new ServiceManager();
        service_manager.RegisterSingleCall<Service_42>();

        var instance1 = service_manager.Get<Service_42>();
        var instance2 = service_manager.Get<Service_42>();

        Assert.AreNotEqual(instance1, instance2);
        Assert.IsFalse(ReferenceEquals(instance1, instance2));
    }

    [TestMethod]
    public void ServiceRegistration_SingletonByThread()
    {
        var service_manager = new ServiceManager();

        service_manager.Register<IService, Service_GetHashCode>(ServiceRegistrationMode.SingleThread);

        var manager = service_manager.ServiceAccessor<IService>();

        var main_instance1 = manager.Service;

        IService? thread1_instance1 = null;
        IService? thread1_instance2 = null;

        IService? thread2_instance1 = null;
        IService? thread2_instance2 = null;

        var starter = new ManualResetEvent(false);
        var waiter1 = new ManualResetEvent(false);
        var waiter2 = new ManualResetEvent(false);
        var thread1 = new Thread(() =>
        {
            thread1_instance1 = manager.Service;
            waiter1.Set();
            starter.WaitOne();
            thread1_instance2 = manager.Service;
        });
        var thread2 = new Thread(() =>
        {
            thread2_instance1 = manager.Service;
            waiter2.Set();
            starter.WaitOne();
            thread2_instance2 = manager.Service;
        });

        thread1.Start();
        thread2.Start();

        waiter2.WaitOne();
        waiter1.WaitOne();

        starter.Set();

        thread1.Join();
        thread2.Join();

        var main_instance2 = manager.Service;

        Assert.That.Value(main_instance1).IsReferenceEquals(main_instance2);
        Assert.That.Value(thread1_instance1).IsReferenceEquals(thread1_instance2);
        Assert.That.Value(thread2_instance1).IsReferenceEquals(thread2_instance2);

        Assert.That.Value(main_instance1)
           .IsNotReferenceEquals(thread1_instance1)
           .IsNotReferenceEquals(thread2_instance1);

        Assert.That.Value(thread1_instance1)
           .IsNotReferenceEquals(thread2_instance1);
    }

    [TestMethod]
    public void ServiceRegistration_SingletonByThread_Simple()
    {
        var service_manager = new ServiceManager();

        service_manager.Register<Service_GetHashCode>(ServiceRegistrationMode.SingleThread);

        var instance = service_manager.Get<Service_GetHashCode>();

        Service_GetHashCode? instance2 = null;

        var get_service_thread = new Thread(() => instance2 = service_manager.Get<Service_GetHashCode>());
        get_service_thread.Start();
        get_service_thread.Join();

        Assert.IsNotNull(instance2);
        var is_same = ReferenceEquals(instance, instance2);
        Assert.IsFalse(is_same);
        Assert.AreNotEqual(instance, instance2);
    }

    [TestMethod]
    public void ServiceRegistration_SingletonByThread_Factory()
    {
        var service_manager = new ServiceManager();
        service_manager.RegisterSingleThread(() => new Service_GetThreadId());

        var manager = service_manager.ServiceAccessor<Service_GetThreadId>();

        var main_instance1 = manager.Service;

        Service_GetThreadId? thread1_instance1 = null;
        Service_GetThreadId? thread1_instance2 = null;

        Service_GetThreadId? thread2_instance1 = null;
        Service_GetThreadId? thread2_instance2 = null;

        var starter = new ManualResetEvent(false);
        var waiter1 = new ManualResetEvent(false);
        var waiter2 = new ManualResetEvent(false);
        var thread1 = new Thread(() =>
        {
            thread1_instance1 = manager.Service;
            waiter1.Set();
            starter.WaitOne();
            thread1_instance2 = manager.Service;
        });
        var thread2 = new Thread(() =>
        {
            thread2_instance1 = manager.Service;
            waiter2.Set();
            starter.WaitOne();
            thread2_instance2 = manager.Service;
        });

        thread1.Start();
        thread2.Start();

        waiter2.WaitOne();
        waiter1.WaitOne();

        starter.Set();

        thread1.Join();
        thread2.Join();

        var main_instance2 = manager.Service;

        Assert.That.Value(main_instance1).IsReferenceEquals(main_instance2);
        Assert.That.Value(thread1_instance1).IsReferenceEquals(thread1_instance2);
        Assert.That.Value(thread2_instance1).IsReferenceEquals(thread2_instance2);

        Assert.That.Value(main_instance1)
           .IsNotReferenceEquals(thread1_instance1)
           .IsNotReferenceEquals(thread2_instance1);

        Assert.That.Value(thread1_instance1)
           .IsNotReferenceEquals(thread2_instance1);
    }

    [TestMethod]
    public void ServiceRegistration_Singleton()
    {
        var service_manager = new ServiceManager();
        service_manager.Register<IService, Service_GetHashCode>();

        var expected = service_manager.Get<IService>();
        var actual = service_manager.Get<IService>();

        Assert.IsInstanceOfType<Service_GetHashCode>(expected);
        Assert.IsInstanceOfType<Service_GetHashCode>(actual);
        Assert.IsTrue(ReferenceEquals(expected, actual));
    }

    [TestMethod]
    public void ServiceRegistration_Singleton_Instance()
    {
        var service_manager = new ServiceManager();
        var expected = new Service_GetHashCode();
        service_manager.RegisterSingleton<IService>(expected);

        var actual = service_manager.Get<IService>();
        Assert.IsInstanceOfType<IService>(actual);
        Assert.IsInstanceOfType<Service_GetHashCode>(actual);

        Assert.AreEqual(expected, actual);
    }

    [TestMethod]
    public void ServiceRegistered()
    {
        var service_manager = new ServiceManager();
        Assert.IsFalse(service_manager.ServiceRegistered<IService>());
        service_manager.Register<IService, Service_42>();
        Assert.IsTrue(service_manager.ServiceRegistered<IService>());
    }

    [TestMethod]
    public void ServiceRegistered_ByType()
    {
        var service_manager = new ServiceManager();
        Assert.IsFalse(service_manager.ServiceRegistered<IService>());
        service_manager.Register<IService, Service_42>();
        Assert.IsTrue(service_manager.ServiceRegistered<IService>());
    }

    [TestMethod]
    public void ServiceRegistration_Singleton_TwoInterfaces()
    {
        var service_manager = new ServiceManager();

        service_manager.RegisterSingleton<IService, Service_TwoInterfaces>();
        service_manager.RegisterSingleton<IService2, Service_TwoInterfaces>();

        var instance_i_service = service_manager.Get<IService>();
        var instance_i_service2 = service_manager.Get<IService2>();

        Assert.IsInstanceOfType<IService>(instance_i_service);
        Assert.IsInstanceOfType<Service_TwoInterfaces>(instance_i_service);
        Assert.IsInstanceOfType<IService2>(instance_i_service2);
        Assert.IsInstanceOfType<Service_TwoInterfaces>(instance_i_service);

        Assert.IsTrue(ReferenceEquals(instance_i_service, instance_i_service2));
    }

    [TestMethod]
    public void ServiceRegistration_Singleton_Timeout()
    {
        var service_manager = new ServiceManager();

        var timeout = TimeSpan.FromMilliseconds(100);
        var registration = service_manager
           .RegisterSingleton<IService, Service_42>()
           .With(r => r.InstanceActualityTime = timeout);

        Assert.AreEqual(timeout, registration.InstanceActualityTime);

        var service1 = service_manager.Get<IService>();
        var service2 = service_manager.Get<IService>();
        Assert.IsNotNull(service1);
        Assert.IsNotNull(service2);
        Assert.IsInstanceOfType<Service_42>(service1);
        Assert.IsInstanceOfType<Service_42>(service2);
        Assert.IsTrue(ReferenceEquals(service1, service2));

        Thread.Sleep(1000);
        var service3 = service_manager.Get<IService>();
        Assert.IsNotNull(service3);
        Assert.IsInstanceOfType<Service_42>(service3);
        //Assert.IsFalse(ReferenceEquals(service1, service3));
    }

    [TestMethod]
    public void ExceptionGeneration_SingleCall()
    {
        var service_manager = new ServiceManager();

        var call_number = 0;
        var registration = service_manager
           .Register<IService>(
                () => throw new ApplicationException((++call_number).ToString()),
                ServiceRegistrationMode.SingleCall);

        var exception_throwed = false;
        Assert.IsNull(registration.LastException);
        try
        {
            service_manager.Get<IService>();
        }
#pragma warning disable CA1031 // Do not catch general exception types
        catch (ApplicationException)
        {
            exception_throwed = true;
        }
#pragma warning restore CA1031 // Do not catch general exception types
        Assert.IsTrue(exception_throwed);
        Assert.IsNotNull(registration.LastException);
        Assert.IsInstanceOfType<ApplicationException>(registration.LastException);
        Assert.AreEqual("1", registration.LastException.Message);

        exception_throwed = false;
        try
        {
            service_manager.Get<IService>();
        }
#pragma warning disable CA1031 // Do not catch general exception types
        catch (ApplicationException)
        {
            exception_throwed = true;
        }
#pragma warning restore CA1031 // Do not catch general exception types
        Assert.IsTrue(exception_throwed);
        Assert.IsNotNull(registration.LastException);
        Assert.IsInstanceOfType<ApplicationException>(registration.LastException);
        Assert.AreEqual("2", registration.LastException.Message);
    }

    [TestMethod]
    public void ExceptionGeneration_Singleton()
    {
        var service_manager = new ServiceManager();

        var call_number = 0;
        var registration = service_manager
           .Register<IService>(
                () => throw new ApplicationException((++call_number).ToString()),
                ServiceRegistrationMode.Singleton);

        var exception_throwed = false;
        Assert.IsNull(registration.LastException);
        try
        {
            service_manager.Get<IService>();
        }
#pragma warning disable CA1031 // Do not catch general exception types
        catch (ApplicationException)
        {
            exception_throwed = true;
        }
#pragma warning restore CA1031 // Do not catch general exception types
        Assert.IsTrue(exception_throwed);
        var last_exception = registration.LastException;
        Assert.IsNotNull(last_exception);
        Assert.IsInstanceOfType<ApplicationException>(last_exception);
        Assert.AreEqual("1", last_exception.Message);

        exception_throwed = false;
        try
        {
            service_manager.Get<IService>();
        }
#pragma warning disable CA1031 // Do not catch general exception types
        catch (ApplicationException)
        {
            exception_throwed = true;
        }
#pragma warning restore CA1031 // Do not catch general exception types
        Assert.IsTrue(exception_throwed);
        Assert.IsNotNull(registration.LastException);
        Assert.IsInstanceOfType<ApplicationException>(registration.LastException);
        Assert.AreEqual("1", registration.LastException.Message);
        Assert.IsTrue(ReferenceEquals(last_exception, registration.LastException));
    }
}