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NotificationServiceTests.cs

using FluentAssertions;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc.ViewFeatures;
using Newtonsoft.Json;
using Nop.Services.Messages;
using NUnit.Framework;

namespace Nop.Tests.Nop.Services.Tests.Messages;

[TestFixture]
public class NotificationServiceTests : ServiceTest
{
    private INotificationService _notificationService;
    private ITempDataDictionaryFactory _tempDataDictionaryFactory;
    private HttpContext _httpContext;

    [OneTimeSetUp]
    public void SetUp()
    {
        _notificationService = GetService();
        _tempDataDictionaryFactory = GetService();
        _httpContext = GetService().HttpContext;
    }

    private IList DeserializedDataDictionary =>
        JsonConvert.DeserializeObject>(_tempDataDictionaryFactory.GetTempData(_httpContext)[NopMessageDefaults.NotificationListKey].ToString());

    [Test]
    public void CanAddNotification()
    {
        _tempDataDictionaryFactory.GetTempData(_httpContext).Clear();
        _notificationService.SuccessNotification("success");
        _notificationService.WarningNotification("warning");
        _notificationService.ErrorNotification("error");
        var messageList = DeserializedDataDictionary;

        messageList.Count.Should().Be(3);
        var successMsg = messageList
            .First(m => m.Type == NotifyType.Success);
        successMsg.Message.Should().Be("success");

        var warningMsg = messageList
            .First(m => m.Type == NotifyType.Warning);
        warningMsg.Message.Should().Be("warning");

        var errorMsg = messageList
            .First(m => m.Type == NotifyType.Error);
        errorMsg.Message.Should().Be("error");
    }

    [Test]
    public async Task CanAddNotificationFromException()
    {
        _tempDataDictionaryFactory.GetTempData(_httpContext).Clear();
        await _notificationService.ErrorNotificationAsync(new Exception("error"));
        var msg = DeserializedDataDictionary.First();
        msg.Message.Should().Be("error");
    }
}