Upgrade packages, add UT for service and create charts.

Pandemic.Tracker.Web.Unit.Tests/Pandemic.Tracker.Web.Unit.Tests.csproj

@@ -13,13 +13,18 @@
     <PackageReference Include="coverlet.collector" Version="6.0.0" />
     <PackageReference Include="FluentAssertions" Version="6.12.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.9.0" />
+    <PackageReference Include="NSubstitute" Version="5.1.0" />
     <PackageReference Include="xunit" Version="2.7.0" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.5.7">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
   </ItemGroup>
 
+  <ItemGroup>
+    <ProjectReference Include="..\Pandemic.Tracker.Web\Pandemic.Tracker.Web.csproj" />
+  </ItemGroup>
+
   <ItemGroup>
     <Using Include="Xunit" />
   </ItemGroup>

Pandemic.Tracker.Web.Unit.Tests/Services/CountryServiceTests.cs

@@ -0,0 +1,84 @@
+// ---------------------------------------------------------------
+// Copyright (c) Coalition of the Good-Hearted Engineers
+// FREE TO USE TO CONNECT THE WORLD
+// ---------------------------------------------------------------
+using System.Net;
+using System.Net.Http.Json;
+using FluentAssertions;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.Logging;
+using NSubstitute;
+using Pandemic.Tracker.Web.Models;
+using Pandemic.Tracker.Web.Services;
+
+namespace Pandemic.Tracker.Web.Unit.Tests.Services;
+public sealed class CountryServiceTests
+{
+	[Fact]
+	public void GetCountriesAsync_ShouldReturnCSountries_WhenApiCallIsSuccessful()
+	{
+		// Arrange
+		var httpClient = new HttpClient(new MockHttpMessageHandler());
+		var configuration = Substitute.For<IConfiguration>();
+		var logger = Substitute.For<ILogger<CountryService>>();
+
+		configuration["APIUrl"].Returns("https://example.com/");
+
+		var service = new CountryService(httpClient, configuration, logger);
+
+		// Act
+		var countries = service.GetCountries();
+
+		// Assert
+		countries.Should().NotBeNullOrEmpty();
+		countries.Should().ContainSingle(c => c.Name == "Country1");
+	}
+
+	[Fact]
+	public void GetCountriesAsync_ShouldReturnEmptyArray_WhenApiCallFails()
+	{
+		// Arrange
+		var httpClient = new HttpClient(new MockHttpMessageHandler(HttpStatusCode.InternalServerError));
+		var configuration = Substitute.For<IConfiguration>();
+		var logger = Substitute.For<ILogger<CountryService>>();
+
+		configuration["APIUrl"].Returns("https://example.com/");
+
+		var service = new CountryService(httpClient, configuration, logger);
+
+		// Act
+		var countries = service.GetCountries();
+
+		// Assert
+		countries.Should().BeEmpty();
+		logger.Received().LogError(Arg.Any<HttpRequestException>(), "An error occurred while fetching countries");
+	}
+
+	private class MockHttpMessageHandler : HttpMessageHandler
+	{
+		private readonly HttpStatusCode _statusCode;
+
+		public MockHttpMessageHandler(HttpStatusCode statusCode = HttpStatusCode.OK)
+		{
+			_statusCode = statusCode;
+		}
+
+		protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, System.Threading.CancellationToken cancellationToken)
+		{
+			if (_statusCode == HttpStatusCode.OK)
+			{
+				var countries = new[]
+				{
+					new Country { Name = "Country1" }
+				};
+
+				return Task.FromResult(new HttpResponseMessage(HttpStatusCode.OK)
+				{
+					Content = JsonContent.Create(countries)
+				});
+			}
+
+			return Task.FromResult(new HttpResponseMessage(_statusCode));
+		}
+	}
+}

Pandemic.Tracker.Web/Components/Pages/CountryChart.razor

@@ -0,0 +1,29 @@
+@page "/country-chart"
+@rendermode InteractiveServer
+@inject CountryService CountryService
+
+<ApexChart TItem="Country" Title="Country Data">
+
+	<ApexPointSeries TItem="Country"
+					 Items="Countries"
+					 Name="Cases"
+					 SeriesType="SeriesType.Bar"
+					 XValue="e => e.Name"
+					 YValue="e=> (decimal)e.Cases" />
+
+	<ApexPointSeries TItem="Country"
+					 Items="Countries"
+					 Name="Deaths"
+					 SeriesType="SeriesType.Bar"
+					 XValue="e => e.Name"
+					 YValue="e=> (decimal)e.Deaths" />
+</ApexChart>
+
+@code {
+	public List<Country>Countries { get; set; } = [];
+
+	protected override void OnInitialized()
+	{
+		Countries = CountryService.GetCountriesStatic().Take(10).ToList();
+	}
+}

Pandemic.Tracker.Web/Components/Pages/Home.razor

@@ -1,25 +1,7 @@
-@inject CountryService CountryService;
-@attribute [StreamRendering]
-@page "/"
+@page "/"
 
 <PageTitle>Home</PageTitle>
 
-@if(Countries.Length == 0)
-{
-	<p><em>Loading...</em></p>
-}
-@foreach (var country in Countries)
-{
-	<p>@country.Name</p>
-	<p>@country.Cases</p>
-}
+<h1>Hello everyone!</h1>
 
-
-@code {
-	public Country[] Countries { get; set; } = [];
-
-	protected override async Task OnInitializedAsync()
-	{
-		Countries = await CountryService.GetCountriesAsync();
-	}
-}
+Welcome to Pandemic Tracker.

Pandemic.Tracker.Web/Components/_Imports.razor

@@ -10,3 +10,4 @@
 @using Pandemic.Tracker.Web.Components
 @using Pandemic.Tracker.Web.Models
 @using Pandemic.Tracker.Web.Services
+@using ApexCharts