add test

tests/Tests.FeatureManagement.AspNetCore/FeatureManagementAspNetCore.cs

@@ -202,6 +202,47 @@ public async Task GatesRazorPageFeatures()
             Assert.Equal(HttpStatusCode.OK, gateAnyNegateResponse.StatusCode);
         }
 
+        [Fact]
+        public async Task GatesActionFilterFeatures()
+        {
+            IConfiguration config = new ConfigurationBuilder().AddJsonFile("appsettings.json").Build();
+
+            TestServer server = new TestServer(WebHost.CreateDefaultBuilder().ConfigureServices(services =>
+            {
+                services
+                    .AddSingleton(config)
+                    .AddFeatureManagement()
+                    .AddFeatureFilter<TestFilter>();
+
+                services.AddMvcCore(o =>
+                {
+                    DisableEndpointRouting(o);
+                    o.Filters.AddForFeature<MvcFilter>(RequirementType.All, Features.ConditionalFeature, Features.ConditionalFeature2);
+                });
+            }).Configure(app => app.UseMvc()));
+
+            TestFilter filter = (TestFilter)server.Host.Services.GetRequiredService<IEnumerable<IFeatureFilterMetadata>>().First(f => f is TestFilter);
+            HttpClient client = server.CreateClient();
+
+            //
+            // Enable all features
+            filter.Callback = _ => Task.FromResult(true);
+            HttpResponseMessage res = await client.GetAsync("");
+            Assert.True(res.Headers.Contains(nameof(MvcFilter)));
+
+            //
+            // Enable 1/2 features
+            filter.Callback = ctx => Task.FromResult(ctx.FeatureName == Features.ConditionalFeature);
+            res = await client.GetAsync("");
+            Assert.False(res.Headers.Contains(nameof(MvcFilter)));
+
+            //
+            // Enable no
+            filter.Callback = _ => Task.FromResult(false);
+            res = await client.GetAsync("");
+            Assert.False(res.Headers.Contains(nameof(MvcFilter)));
+        }
+
         private static void DisableEndpointRouting(MvcOptions options)
         {
             options.EnableEndpointRouting = false;