Add PluginsController tests

tests/Jellyfin.Server.Integration.Tests/Controllers/PluginsControllerTests.cs

@@ -0,0 +1,45 @@
+using System.Net;
+using System.Net.Http.Json;
+using System.Net.Mime;
+using System.Text;
+using System.Threading.Tasks;
+using Jellyfin.Extensions.Json;
+using MediaBrowser.Model.Plugins;
+using Xunit;
+
+namespace Jellyfin.Server.Integration.Tests.Controllers;
+
+public sealed class PluginsControllerTests : IClassFixture<JellyfinApplicationFactory>
+{
+    private readonly JellyfinApplicationFactory _factory;
+    private static string? _accessToken;
+
+    public PluginsControllerTests(JellyfinApplicationFactory factory)
+    {
+        _factory = factory;
+    }
+
+    [Fact]
+    public async Task GetPlugins_Unauthorized_ReturnsUnauthorized()
+    {
+        var client = _factory.CreateClient();
+
+        var response = await client.GetAsync("/Plugins");
+
+        Assert.Equal(HttpStatusCode.Unauthorized, response.StatusCode);
+    }
+
+    [Fact]
+    public async Task GetPlugins_Authorized_ReturnsCorrectResponse()
+    {
+        var client = _factory.CreateClient();
+        client.DefaultRequestHeaders.AddAuthHeader(_accessToken ??= await AuthHelper.CompleteStartupAsync(client));
+
+        var response = await client.GetAsync("/Plugins");
+
+        Assert.Equal(HttpStatusCode.OK, response.StatusCode);
+        Assert.Equal(MediaTypeNames.Application.Json, response.Content.Headers.ContentType?.MediaType);
+        Assert.Equal(Encoding.UTF8.BodyName, response.Content.Headers.ContentType?.CharSet);
+        _ = await response.Content.ReadFromJsonAsync<PluginInfo[]>(JsonDefaults.Options);
+    }
+}