Implement tests

Telegram.Net/AssemblyInfo.cs

@@ -0,0 +1,3 @@
+using System.Runtime.CompilerServices;
+
+[assembly: InternalsVisibleTo("Telegram.Tests")]

Telegram.Net/Interfaces/ITelegramBotConfig.cs

@@ -8,7 +8,7 @@ public interface ITelegramBotConfig
     /// <summary>
     /// Token of telegram bot. You can take it from @BotFather
     /// </summary>
-    public string Token { internal get; init; }
+    public string Token { get; set; }
     /// <summary>
     /// Custom error handler for bot. You can add custom logger or anything. 
     /// </summary>

Telegram.Net/Models/TelegramBotConfig.cs

@@ -11,7 +11,7 @@ public class TelegramBotConfig : ITelegramBotConfig
         Token = token;
     }
 
-    public string Token { get; init; }
+    public string Token { get; set; }
     public Func<ITelegramBotClient, Exception, CancellationToken, Task>? errorHandler { get; init; }
     public ReceiverOptions? ReceiverOptions { get; init; }
 }

Telegram.Net/Services/TelegramHostedService.cs

@@ -29,7 +29,7 @@ public class TelegramHostedService : IHostedService
         Config = config;
         this.isc = isc;
     }
-    private static bool IsValidHandlerMethod(MethodInfo method, Type parameterType)
+    internal static bool IsValidHandlerMethod(MethodInfo method, Type parameterType)
     {
         var parameters = method.GetParameters();
         return method.ReturnType == typeof(Task) &&
@@ -39,7 +39,7 @@ public class TelegramHostedService : IHostedService
                parameters[2].ParameterType == typeof(CancellationToken);
     }
 
-    private static Func<ITelegramBotClient, T, CancellationToken, Task> CreateDelegate<T>(MethodInfo method)
+    internal static Func<ITelegramBotClient, T, CancellationToken, Task> CreateDelegate<T>(MethodInfo method)
     {
         var delegateType = typeof(Func<ITelegramBotClient, T, CancellationToken, Task>);
         return (Delegate.CreateDelegate(delegateType, null, method) as Func<ITelegramBotClient, T, CancellationToken, Task>)!;

tests/Telegram.Tests/Telegram.Tests.csproj

@@ -11,10 +11,23 @@
 
     <ItemGroup>
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.1"/>
+        <PackageReference Include="Moq" Version="4.20.72" />
         <PackageReference Include="NUnit" Version="3.13.3"/>
         <PackageReference Include="NUnit3TestAdapter" Version="4.4.2"/>
         <PackageReference Include="NUnit.Analyzers" Version="3.6.1"/>
         <PackageReference Include="coverlet.collector" Version="3.2.0"/>
+        <PackageReference Include="Telegram.Bot" Version="22.4.4" />
     </ItemGroup>
 
+    <ItemGroup>
+      <ProjectReference Include="..\..\Telegram.Net\Telegram.Net.csproj" />
+    </ItemGroup>
+
+    <ItemGroup>
+        <None Update="appsettings.json">
+            <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+        </None>
+    </ItemGroup>
+
+
 </Project>

tests/Telegram.Tests/TestTelegramHostedService.cs

@@ -0,0 +1,201 @@
+using Telegram.Bot;
+using Telegram.Bot.Polling;
+using Telegram.Bot.Types;
+using Telegram.Bot.Types.InlineQueryResults;
+using Telegram.Bot.Types.Payments;
+using Telegram.Net.Attributes;
+using Telegram.Net.Interfaces;
+using Telegram.Net.Services;
+
+using System.Reflection;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using Moq;
+using Telegram.Bot.Types.Enums;
+using Telegram.Bot.Types.ReplyMarkups;
+
+namespace Telegram.Tests
+{
+    [TestFixture]
+    public class TelegramHostedServiceTests
+    {
+        private Mock<ITelegramBotConfig> _configMock;
+        private ServiceCollection _services;
+
+        [SetUp]
+        public void Setup()
+        {
+            var conf = new ConfigurationBuilder()
+                .AddEnvironmentVariables()
+                .AddJsonFile("appsettings.json")
+                .Build();
+            Console.WriteLine(conf.GetValue<string>("telegram_test_token"));
+            _configMock = new Mock<ITelegramBotConfig>();
+            _configMock.Setup(c => c.Token).Returns(conf.GetValue<string>("telegram_test_token"));
+            _services = new ServiceCollection();
+        }
+
+        public class TestHandler : IUpdatePollingService
+        {
+            [Command("start")]
+            public async Task HandleStart(ITelegramBotClient client, Message message, CancellationToken ct)
+                => await client.SendTextMessageAsync(message.Chat.Id, "Started", cancellationToken: ct);
+
+            [Callback("test_callback")]
+            public async Task HandleCallback(ITelegramBotClient client, CallbackQuery query, CancellationToken ct)
+                => await client.AnswerCallbackQueryAsync(query.Id, "Callback handled", cancellationToken: ct);
+
+            [EditMessage]
+            public async Task HandleEdit(ITelegramBotClient client, Message message, CancellationToken ct)
+                => await client.EditMessageTextAsync(message.Chat.Id, message.MessageId, "Edited", cancellationToken: ct);
+
+            [Inline("search")]
+            public async Task HandleInline(ITelegramBotClient client, InlineQuery query, CancellationToken ct)
+                => await client.AnswerInlineQueryAsync(query.Id, new[] { new InlineQueryResultArticle("1", "Test", new InputTextMessageContent("Test")) }, cancellationToken: ct);
+
+            [PreCheckout]
+            public async Task HandlePayment(ITelegramBotClient client, PreCheckoutQuery query, CancellationToken ct)
+                => await client.AnswerPreCheckoutQueryAsync(query.Id, cancellationToken: ct);
+
+            [Update]
+            public async Task HandleUpdate(ITelegramBotClient client, Update update, CancellationToken ct)
+                => await client.SendTextMessageAsync(123, "Update handled", cancellationToken: ct);
+        }
+
+        [Test]
+        public void AddAttributes_RegistersCommandHandlersCorrectly()
+        {
+            _services.AddSingleton<TestHandler>();
+            var service = new TelegramHostedService(_configMock.Object, _services);
+
+            service.AddAttributes(CancellationToken.None).Wait();
+
+            Assert.Multiple(() =>
+            {
+                Assert.That(TelegramHostedService.CommandHandler, Contains.Key("start"));
+                Assert.That(TelegramHostedService.CallbackQueryHandler, Contains.Key("test_callback"));
+                Assert.That(TelegramHostedService.EditedMessageHandler, Has.Count.EqualTo(1));
+                Assert.That(TelegramHostedService.InlineHandler, Contains.Key("search"));
+                Assert.That(TelegramHostedService.PreCheckoutHandler, Is.Not.Null);
+                Assert.That(TelegramHostedService.DefaultUpdateHandler, Has.Count.EqualTo(1));
+            });
+        }
+
+        [Test]
+        public void IsValidHandlerMethod_ValidMessageHandler_ReturnsTrue()
+        {
+            // Arrange
+            var method = typeof(TestHandler).GetMethod("HandleStart");
+
+            // Act
+            var result = TelegramHostedService.IsValidHandlerMethod(method, typeof(Message));
+
+            // Assert
+            Assert.That(result, Is.True);
+        }
+
+        [Test]
+        public void IsValidHandlerMethod_InvalidParameters_ReturnsFalse()
+        {
+            // Arrange
+            var method = typeof(TestHandler).GetMethod("HandleStart");
+
+            // Act
+            var result = TelegramHostedService.IsValidHandlerMethod(method, typeof(CallbackQuery));
+
+            // Assert
+            Assert.That(result, Is.False);
+        }
+    }
+
+    [TestFixture]
+    public class IntegrationTests
+    {
+        private Mock<ITelegramBotClient> _botClientMock;
+        private TelegramHostedService _hostedService;
+        private Mock<ITelegramBotConfig> _configMock;
+
+        [SetUp]
+        public void Setup()
+        {
+            _configMock = new Mock<ITelegramBotConfig>();
+            _configMock.Setup(c => c.Token).Returns("test_token");
+            _configMock.Setup(c => c.ReceiverOptions).Returns(new ReceiverOptions());
+            
+            var services = new ServiceCollection();
+            services.AddSingleton<TelegramHostedServiceTests.TestHandler>();
+            _botClientMock = new Mock<ITelegramBotClient>();
+            
+            _hostedService = new TelegramHostedService(_configMock.Object, services);
+            _hostedService.AddAttributes(CancellationToken.None).Wait();
+        }
+
+        [Test]
+        public async Task HandleMessage_ValidCommand_ExecutesHandler()
+        {
+            // Arrange
+            var message = new Message { Text = "/start", Chat = new Chat { Id = 123 } };
+            var update = new Update { Message = message };
+
+            _botClientMock.Setup(b => b.SendMessage(
+                It.IsAny<ChatId>(),
+                "Started",
+                It.IsAny<ParseMode>(),
+                It.IsAny<ReplyParameters>(),
+                It.IsAny<ReplyMarkup>(),
+                It.IsAny<LinkPreviewOptions>(),
+                It.IsAny<int>(),
+                It.IsAny<IEnumerable<MessageEntity>>(),
+                It.IsAny<bool>(),
+                It.IsAny<bool>(),
+                It.IsAny<string>(),
+                It.IsAny<string>(),
+                It.IsAny<bool>(),
+                It.IsAny<CancellationToken>()
+            )).Verifiable();
+
+            // Act
+            await _hostedService.StartAsync(CancellationToken.None);
+            await InvokeUpdateHandler(update);
+
+            // Assert
+            _botClientMock.Verify();
+        }
+
+        [Test]
+        public async Task HandleCallback_ValidQuery_ExecutesHandler()
+        {
+            // Arrange
+            var callback = new CallbackQuery { Data = "test_callback", Id = "cb_id" };
+            var update = new Update { CallbackQuery = callback };
+
+            _botClientMock.Setup(b => b.AnswerCallbackQueryAsync(
+                "cb_id",
+                "Callback handled",
+                It.IsAny<bool>(),
+                It.IsAny<string>(),
+                It.IsAny<int>(),
+                It.IsAny<CancellationToken>()
+                )).Verifiable();
+
+            // Act
+            await _hostedService.StartAsync(CancellationToken.None);
+            await InvokeUpdateHandler(update);
+
+            // Assert
+            _botClientMock.Verify();
+        }
+
+        private async Task InvokeUpdateHandler(Update update)
+        {
+            var clientField = typeof(TelegramHostedService).GetField("Client", BindingFlags.NonPublic | BindingFlags.Instance);
+            clientField.SetValue(_hostedService, _botClientMock.Object);
+
+            var updateHandler = _botClientMock.Invocations
+                .First(i => i.Method.Name == "StartReceiving")
+                .Arguments[0] as Func<ITelegramBotClient, Update, CancellationToken, Task>;
+
+            await updateHandler(_botClientMock.Object, update, CancellationToken.None);
+        }
+    }
+}

tests/Telegram.Tests/UnitTest1.cs

@@ -1,15 +0,0 @@
-namespace Telegram.Tests;
-
-public class Tests
-{
-    [SetUp]
-    public void Setup()
-    {
-    }
-
-    [Test]
-    public void Test1()
-    {
-        Assert.Pass();
-    }
-}

tests/Telegram.Tests/appsettings.json

@@ -0,0 +1,3 @@
+{
+  "telegram_test_token": "7994961223:AAEx8olljS-CoeFa1L0EJeW-MBlEQXuov2U"
+}