ScadaBridge/tests/ZB.MOM.WW.ScadaBridge.CentralUI.Tests/ComponentRenderingTests.cs

using System.Security.Claims;
using Bunit;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Components.Authorization;
using Microsoft.Extensions.DependencyInjection;
using ZB.MOM.WW.ScadaBridge.CentralUI.Components.Pages;

namespace ZB.MOM.WW.ScadaBridge.CentralUI.Tests;

/// <summary>
/// bUnit rendering tests for CentralUI Blazor components.
/// Verifies that pages render their expected markup structure.
/// </summary>
public class ComponentRenderingTests : BunitContext
{
    [Fact]
    public void LoginPage_RendersForm_WithUsernameAndPasswordFields()
    {
        var cut = Render<Login>();

        // Verify the form action
        var form = cut.Find("form");
        Assert.Equal("/auth/login", form.GetAttribute("action"));

        // Verify username field
        var usernameInput = cut.Find("input#username");
        Assert.Equal("text", usernameInput.GetAttribute("type"));
        Assert.Equal("username", usernameInput.GetAttribute("name"));

        // Verify password field
        var passwordInput = cut.Find("input#password");
        Assert.Equal("password", passwordInput.GetAttribute("type"));
        Assert.Equal("password", passwordInput.GetAttribute("name"));

        // Verify submit button
        var submitButton = cut.Find("button[type='submit']");
        Assert.Contains("Sign in", submitButton.TextContent);
    }

    [Fact]
    public void LoginPage_WithoutError_DoesNotRenderAlert()
    {
        var cut = Render<Login>();

        Assert.Throws<Bunit.ElementNotFoundException>(() => cut.Find("div.panel.notice.login-error"));
    }

    [Fact]
    public void Dashboard_RequiresAuthorizeAttribute()
    {
        var authorizeAttrs = typeof(Dashboard)
            .GetCustomAttributes(typeof(AuthorizeAttribute), true);
        Assert.NotEmpty(authorizeAttrs);
    }

    [Fact]
    public void TemplateEditor_RequiresDesignPolicy()
    {
        var authorizeAttrs = typeof(ZB.MOM.WW.ScadaBridge.CentralUI.Components.Pages.Design.Templates)
            .GetCustomAttributes(typeof(AuthorizeAttribute), true);
        Assert.NotEmpty(authorizeAttrs);

        var attr = (AuthorizeAttribute)authorizeAttrs[0];
        Assert.Equal("RequireDesign", attr.Policy);
    }

    [Fact]
    public void LoginPage_RendersScadaBridgeTitle()
    {
        var cut = Render<Login>();

        var title = cut.Find("h1.login-title");
        Assert.Contains("ScadaBridge", title.TextContent);
    }
}