Started working on UnitTests for frontend

tests/HopFrame.Tests.Web/Pages/AdminLoginTests.cs

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+using BlazorStrap;
+using Bunit;
+using Bunit.TestDoubles;
+using CurrieTechnologies.Razor.SweetAlert2;
+using HopFrame.Security.Models;
+using HopFrame.Web.Pages.Administration;
+using HopFrame.Web.Services;
+using Microsoft.AspNetCore.Components;
+using Microsoft.Extensions.DependencyInjection;
+using Moq;
+
+namespace HopFrame.Tests.Web.Pages;
+
+public class AdminLoginTests : TestContext {
+
+    private (IRenderedComponent<AdminLogin>, NavigationManager) SetupEnvironment(bool correctCredentials = true) {
+        var auth = new Mock<IAuthService>();
+        auth
+            .Setup(a => a.Login(It.IsAny<UserLogin>()))
+            .ReturnsAsync(correctCredentials);
+        
+        Services.AddSweetAlert2();
+        Services.AddBlazorStrap();
+        Services.AddSingleton(auth.Object);
+        var navigator = Services.GetRequiredService<FakeNavigationManager>();
+
+        var component = RenderComponent<AdminLogin>();
+        return (component, navigator);
+    }
+    
+    [Fact]
+    public void Login_Has_RequiredFields() {
+        // Arrange
+        var (component, _) = SetupEnvironment();
+
+        // Act
+        var inputs = component.FindAll("input");
+        var buttons = component.FindAll("button");
+        var form = component.FindAll("form");
+        
+        // Assert
+        Assert.Equal(2, inputs.Count);
+        Assert.Single(buttons);
+        Assert.Single(form);
+        Assert.Equal("submit", buttons[0].Attributes.GetNamedItem("type")?.Value);
+        
+        foreach (var input in inputs) {
+            var attribute = input.Attributes.GetNamedItem("required");
+            Assert.NotNull(attribute);
+            Assert.NotEqual("false", attribute?.Value);
+        }
+    }
+
+    [Fact]
+    public void Login_With_CorrectCredentials_Should_Redirect() {
+        // Arrange
+        var (component, nav) = SetupEnvironment();
+        var email = component.Find("""input[type="email"]""");
+        var password = component.Find("""input[type="password"]""");
+        var submit = component.Find("button");
+
+        // Act
+        email.Change("test@example.com");
+        password.Change("1234567890");
+        submit.Click();
+        
+        // Assert
+        Assert.EndsWith("/administration", nav.Uri);
+    }
+    
+    [Fact]
+    public void Login_With_CorrectCredentials_And_CustomRedirect_Should_Redirect() {
+        // Arrange
+        var (component, nav) = SetupEnvironment();
+        var email = component.Find("""input[type="email"]""");
+        var password = component.Find("""input[type="password"]""");
+        var submit = component.Find("button");
+
+        component.Instance.RedirectAfter = "testRedirect";
+
+        // Act
+        email.Change("test@example.com");
+        password.Change("1234567890");
+        submit.Click();
+        
+        // Assert
+        Assert.EndsWith("/administration/testRedirect", nav.Uri);
+    }
+    
+    [Fact]
+    public void Login_With_IncorrectCredentials_Should_Fail() {
+        // Arrange
+        var (component, nav) = SetupEnvironment(false);
+        var email = component.Find("""input[type="email"]""");
+        var password = component.Find("""input[type="password"]""");
+        var submit = component.Find("button");
+
+        // Act
+        email.Change("test@example.com");
+        password.Change("1234567890");
+        submit.Click();
+        
+        // Assert
+        Assert.False(nav.Uri.EndsWith("/administration"));
+    }
+
+    [Fact]
+    public void Login_With_IncorrectCredentials_DisplaysError() {
+        // Arrange
+        var (component, _) = SetupEnvironment(false);
+        var email = component.Find("""input[type="email"]""");
+        var password = component.Find("""input[type="password"]""");
+        var submit = component.Find("button");
+
+        // Act
+        email.Change("test@example.com");
+        password.Change("1234567890");
+        submit.Click();
+        
+        // Assert
+        Assert.Contains("Email or password does not match any account!", component.Markup);
+    }
+}