ChatBot/ChatBot.Tests/Services/Telegram/TelegramBotServiceBasicTests.cs

using ChatBot.Services.Telegram.Services;
using FluentAssertions;
using Microsoft.Extensions.Logging;
using Moq;
using Telegram.Bot;

namespace ChatBot.Tests.Services.Telegram;

/// <summary>
/// Базовые тесты для TelegramBotService
/// Полное тестирование затруднено из-за extension методов Telegram.Bot
/// </summary>
public class TelegramBotServiceBasicTests
{
    [Fact]
    public void Constructor_ShouldCreateInstance()
    {
        // Arrange
        var loggerMock = new Mock<ILogger<TelegramBotService>>();
        var botClientMock = new Mock<ITelegramBotClient>();
        var serviceProviderMock = new Mock<IServiceProvider>();

        // Act
        var service = new TelegramBotService(
            loggerMock.Object,
            botClientMock.Object,
            serviceProviderMock.Object
        );

        // Assert
        service.Should().NotBeNull();
    }

    [Fact]
    public async Task StopAsync_ShouldComplete()
    {
        // Arrange
        var loggerMock = new Mock<ILogger<TelegramBotService>>();
        var botClientMock = new Mock<ITelegramBotClient>();
        var serviceProviderMock = new Mock<IServiceProvider>();

        var service = new TelegramBotService(
            loggerMock.Object,
            botClientMock.Object,
            serviceProviderMock.Object
        );

        // Act
        var act = async () => await service.StopAsync(CancellationToken.None);

        // Assert
        await act.Should().NotThrowAsync();
    }

    [Fact]
    public async Task StopAsync_ShouldLog()
    {
        // Arrange
        var loggerMock = new Mock<ILogger<TelegramBotService>>();
        var botClientMock = new Mock<ITelegramBotClient>();
        var serviceProviderMock = new Mock<IServiceProvider>();

        var service = new TelegramBotService(
            loggerMock.Object,
            botClientMock.Object,
            serviceProviderMock.Object
        );

        // Act
        await service.StopAsync(CancellationToken.None);

        // Assert
        loggerMock.Verify(
            x => x.Log(
                LogLevel.Information,
                It.IsAny<EventId>(),
                It.Is<It.IsAnyType>((v, t) => v.ToString()!.Contains("Stopping Telegram bot service")),
                It.IsAny<Exception>(),
                It.IsAny<Func<It.IsAnyType, Exception?, string>>()
            ),
            Times.Once
        );
    }
}