Add route smoke tests

Elternbeirat.Web.Tests/RouteSmokeTests.cs

@@ -0,0 +1,65 @@
+using System.Net;
+using Microsoft.AspNetCore.Mvc.Testing;
+
+namespace Elternbeirat.Web.Tests;
+
+/// <summary>
+/// Smoke tests: every known route must return 200, unknown routes must return
+/// 404. This catches broken content files, renamed slugs or routing regressions
+/// before a deploy.
+/// </summary>
+public sealed class RouteSmokeTests : IClassFixture<WebApplicationFactory<Program>>
+{
+    private readonly WebApplicationFactory<Program> _factory;
+
+    public RouteSmokeTests(WebApplicationFactory<Program> factory)
+    {
+        _factory = factory;
+    }
+
+    /// <summary>
+    /// Every route that a visitor can reach through the navigation, the FAQ hub
+    /// or the news section.
+    /// </summary>
+    public static TheoryData<string> KnownRoutes =>
+    [
+        "/",
+        "/vorstandsteam",
+        "/foerderverein",
+        "/faq",
+        "/faq-mensa",
+        "/faq-schliessfach",
+        "/faq-elterneuro",
+        "/faq-elternarbeit",
+        "/downloads",
+        "/kontakt",
+        "/impressum",
+        "/datenschutz",
+        "/beitraege",
+        "/beitraege/neuer-vorstand-gewaehlt",
+        "/beitraege/neue-sporthalle-eroeffnet",
+    ];
+
+    [Theory]
+    [MemberData(nameof(KnownRoutes))]
+    public async Task Known_route_returns_200(string route)
+    {
+        var client = _factory.CreateClient();
+
+        var response = await client.GetAsync(route);
+
+        Assert.Equal(HttpStatusCode.OK, response.StatusCode);
+    }
+
+    [Theory]
+    [InlineData("/gibt-es-nicht")]
+    [InlineData("/beitraege/gibt-es-nicht")]
+    public async Task Unknown_route_returns_404(string route)
+    {
+        var client = _factory.CreateClient();
+
+        var response = await client.GetAsync(route);
+
+        Assert.Equal(HttpStatusCode.NotFound, response.StatusCode);
+    }
+}