Add branching functional tests (#905)

test/Microsoft.AspNetCore.Routing.FunctionalTests/EndpointRoutingSampleTest.cs

@@ -24,6 +24,22 @@ namespace Microsoft.AspNetCore.Routing.FunctionalTests
             _client.BaseAddress = new Uri("http://localhost");
         }
 
+        [Theory]
+        [InlineData("Branch1")]
+        [InlineData("Branch2")]
+        public async Task Routing_CanRouteRequest_ToBranchRouter(string branch)
+        {
+            // Arrange
+            var message = new HttpRequestMessage(HttpMethod.Get, $"{branch}/api/get/5");
+
+            // Act
+            var response = await _client.SendAsync(message);
+
+            // Assert
+            Assert.Equal(HttpStatusCode.OK, response.StatusCode);
+            Assert.Equal($"{branch} - API Get 5", await response.Content.ReadAsStringAsync());
+        }
+
         [Fact]
         public async Task MatchesRootPath_AndReturnsPlaintext()
         {

test/Microsoft.AspNetCore.Routing.FunctionalTests/RouterSampleTest.cs

@@ -24,6 +24,22 @@ namespace Microsoft.AspNetCore.Routing.FunctionalTests
             _client.BaseAddress = new Uri("http://localhost");
         }
 
+        [Theory]
+        [InlineData("Branch1")]
+        [InlineData("Branch2")]
+        public async Task Routing_CanRouteRequest_ToBranchRouter(string branch)
+        {
+            // Arrange
+            var message = new HttpRequestMessage(HttpMethod.Get, $"{branch}/api/get/5");
+
+            // Act
+            var response = await _client.SendAsync(message);
+
+            // Assert
+            Assert.Equal(HttpStatusCode.OK, response.StatusCode);
+            Assert.Equal($"{branch} - API Get 5", await response.Content.ReadAsStringAsync());
+        }
+
         [Fact]
         public async Task Routing_CanRouteRequestDelegate_ToSpecificHttpVerb()
         {

test/WebSites/RoutingWebSite/UseEndpointRoutingStartup.cs

@@ -8,6 +8,7 @@ using System.Text;
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Http.Features;
 using Microsoft.AspNetCore.Internal;
 using Microsoft.AspNetCore.Routing;
 using Microsoft.AspNetCore.Routing.Internal;
@@ -34,11 +35,11 @@ namespace RoutingWebSite
 
         public void Configure(IApplicationBuilder app)
         {
-            app.UseEndpointRouting(builder =>
+            app.UseEndpointRouting(routes =>
             {
-                builder.MapHello("/helloworld", "World");
+                routes.MapHello("/helloworld", "World");
 
-                builder.MapGet(
+                routes.MapGet(
                     "/",
                     (httpContext) =>
                     {
@@ -56,7 +57,7 @@ namespace RoutingWebSite
                         response.ContentType = "text/plain";
                         return response.WriteAsync(sb.ToString());
                     });
-                builder.MapGet(
+                routes.MapGet(
                     "/plaintext",
                     (httpContext) =>
                     {
@@ -67,7 +68,7 @@ namespace RoutingWebSite
                         response.ContentLength = payloadLength;
                         return response.Body.WriteAsync(_plainTextPayload, 0, payloadLength);
                     });
-                builder.MapGet(
+                routes.MapGet(
                     "/withconstraints/{id:endsWith(_001)}",
                     (httpContext) =>
                     {
@@ -76,7 +77,7 @@ namespace RoutingWebSite
                         response.ContentType = "text/plain";
                         return response.WriteAsync("WithConstraints");
                     });
-                builder.MapGet(
+                routes.MapGet(
                     "/withoptionalconstraints/{id:endsWith(_001)?}",
                     (httpContext) =>
                     {
@@ -85,7 +86,7 @@ namespace RoutingWebSite
                         response.ContentType = "text/plain";
                         return response.WriteAsync("withoptionalconstraints");
                     });
-                builder.MapGet(
+                routes.MapGet(
                     "/WithSingleAsteriskCatchAll/{*path}",
                     (httpContext) =>
                     {
@@ -98,7 +99,7 @@ namespace RoutingWebSite
                             "Link: " + linkGenerator.GetPathByRouteValues(httpContext, "WithSingleAsteriskCatchAll", new { }));
                     },
                     new RouteValuesAddressMetadata(routeName: "WithSingleAsteriskCatchAll", requiredValues: new RouteValueDictionary()));
-                builder.MapGet(
+                routes.MapGet(
                     "/WithDoubleAsteriskCatchAll/{**path}",
                     (httpContext) =>
                     {
@@ -113,11 +114,24 @@ namespace RoutingWebSite
                     new RouteValuesAddressMetadata(routeName: "WithDoubleAsteriskCatchAll", requiredValues: new RouteValueDictionary()));
             });
 
+            app.Map("/Branch1", branch => SetupBranch(branch, "Branch1"));
+            app.Map("/Branch2", branch => SetupBranch(branch, "Branch2"));
+
             app.UseStaticFiles();
 
             // Imagine some more stuff here...
 
             app.UseEndpoint();
         }
+
+        private void SetupBranch(IApplicationBuilder app, string name)
+        {
+            app.UseEndpointRouting(routes =>
+            {
+                routes.MapGet("api/get/{id}", (context) => context.Response.WriteAsync($"{name} - API Get {context.GetRouteData().Values["id"]}"));
+            });
+
+            app.UseEndpoint();
+        }
     }
 }

test/WebSites/RoutingWebSite/UseRouterStartup.cs

@@ -38,6 +38,17 @@ namespace RoutingWebSite
                         defaults: new { lastName = "Doe" },
                         constraints: new { lastName = new RegexRouteConstraint(new Regex("[a-zA-Z]{3}", RegexOptions.CultureInvariant, RegexMatchTimeout)) });
             });
+
+            app.Map("/Branch1", branch => SetupBranch(branch, "Branch1"));
+            app.Map("/Branch2", branch => SetupBranch(branch, "Branch2"));
+        }
+
+        private void SetupBranch(IApplicationBuilder app, string name)
+        {
+            app.UseRouter(routes =>
+            {
+                routes.MapGet("api/get/{id}", (request, response, routeData) => response.WriteAsync($"{name} - API Get {routeData.Values["id"]}"));
+            });
         }
     }
 }