snapshot of https://github.com/grpc/grpc-go.git (master, 2026-09-15; blobs > 131072B omitted)

xds/test/eds_resource_missing_test.go

@@ -0,0 +1,188 @@
+/*
+ *
+ * Copyright 2025 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package xds_test
+
+import (
+	"context"
+	"fmt"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/google/uuid"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/credentials/insecure"
+	"google.golang.org/grpc/internal"
+	"google.golang.org/grpc/internal/grpctest"
+	"google.golang.org/grpc/internal/testutils/xds/e2e"
+	"google.golang.org/grpc/internal/testutils/xds/e2e/setup"
+	"google.golang.org/grpc/internal/xds/bootstrap"
+	"google.golang.org/grpc/internal/xds/xdsclient"
+	"google.golang.org/grpc/resolver"
+	"google.golang.org/grpc/status"
+
+	v3clusterpb "github.com/envoyproxy/go-control-plane/envoy/config/cluster/v3"
+	v3endpointpb "github.com/envoyproxy/go-control-plane/envoy/config/endpoint/v3"
+	v3listenerpb "github.com/envoyproxy/go-control-plane/envoy/config/listener/v3"
+	v3routepb "github.com/envoyproxy/go-control-plane/envoy/config/route/v3"
+	testgrpc "google.golang.org/grpc/interop/grpc_testing"
+	testpb "google.golang.org/grpc/interop/grpc_testing"
+
+	_ "google.golang.org/grpc/xds" // To register the xDS resolver and LB policies.
+)
+
+const (
+	defaultTestWatchExpiryTimeout = 500 * time.Millisecond
+	defaultTestTimeout            = 5 * time.Second
+)
+
+type s struct {
+	grpctest.Tester
+}
+
+func Test(t *testing.T) {
+	grpctest.RunSubTests(t, s{})
+}
+
+// Test verifies the xDS-enabled gRPC channel's behavior when the management
+// server fails to send an EDS resource referenced by a Cluster resource. The
+// expected outcome is an RPC failure with a status code Unavailable and a
+// message indicating the absence of available targets.
+func (s) TestEDS_MissingResource(t *testing.T) {
+	// Start an xDS management server.
+	mgmtServer := e2e.StartManagementServer(t, e2e.ManagementServerOptions{AllowResourceSubset: true})
+
+	// Create bootstrap configuration pointing to the above management server.
+	nodeID := uuid.New().String()
+	bc := e2e.DefaultBootstrapContents(t, nodeID, mgmtServer.Address)
+	config, err := bootstrap.NewConfigFromContents(bc)
+	if err != nil {
+		t.Fatalf("Failed to parse bootstrap contents: %s, %v", string(bc), err)
+	}
+
+	// Create an xDS client with a short resource expiry timer.
+	pool := xdsclient.NewPool(config)
+	xdsC, xdsClose, err := pool.NewClientForTesting(xdsclient.OptionsForTesting{
+		Name:               t.Name(),
+		WatchExpiryTimeout: defaultTestWatchExpiryTimeout,
+	})
+	if err != nil {
+		t.Fatalf("Failed to create xDS client: %v", err)
+	}
+	defer xdsClose()
+
+	// Create an xDS resolver for the test that uses the above xDS client.
+	resolverBuilder := internal.NewXDSResolverWithClientForTesting.(func(xdsclient.XDSClient) (resolver.Builder, error))
+	xdsResolver, err := resolverBuilder(xdsC)
+	if err != nil {
+		t.Fatalf("Failed to create xDS resolver for testing: %v", err)
+	}
+
+	// Create resources on the management server. No EDS resource is configured.
+	const serviceName = "my-service-client-side-xds"
+	const routeConfigName = "route-" + serviceName
+	const clusterName = "cluster-" + serviceName
+	const endpointsName = "endpoints-" + serviceName
+	resources := e2e.UpdateOptions{
+		NodeID:         nodeID,
+		SkipValidation: true, // Cluster resource refers to an EDS resource that is not configured.
+		Listeners:      []*v3listenerpb.Listener{e2e.DefaultClientListener(serviceName, routeConfigName)},
+		Routes:         []*v3routepb.RouteConfiguration{e2e.DefaultRouteConfig(routeConfigName, serviceName, clusterName)},
+		Clusters:       []*v3clusterpb.Cluster{e2e.DefaultCluster(clusterName, endpointsName, e2e.SecurityLevelNone)},
+	}
+	ctx, cancel := context.WithTimeout(context.Background(), defaultTestTimeout)
+	defer cancel()
+	if err := mgmtServer.Update(ctx, resources); err != nil {
+		t.Fatal(err)
+	}
+
+	// Create a ClientConn with the xds:/// scheme.
+	cc, err := grpc.NewClient(fmt.Sprintf("xds:///%s", serviceName), grpc.WithTransportCredentials(insecure.NewCredentials()), grpc.WithResolvers(xdsResolver))
+	if err != nil {
+		t.Fatalf("Failed to create a grpc channel: %v", err)
+	}
+	defer cc.Close()
+
+	// Make an RPC and verify that it fails with the expected error.
+	client := testgrpc.NewTestServiceClient(cc)
+	_, err = client.EmptyCall(ctx, &testpb.Empty{})
+	if err == nil {
+		t.Fatal("EmptyCall() succeeded, want failure")
+	}
+	if gotCode, wantCode := status.Code(err), codes.Unavailable; gotCode != wantCode {
+		t.Errorf("EmptyCall() failed with code = %v, want %s", gotCode, wantCode)
+	}
+	if gotMsg, wantMsg := err.Error(), "no targets to pick from"; !strings.Contains(gotMsg, wantMsg) {
+		t.Errorf("EmptyCall() failed with message = %q, want to contain %q", gotMsg, wantMsg)
+	}
+}
+
+// Test verifies the xDS-enabled gRPC channel's behavior when the management
+// server sends an EDS resource with no endpoints. The expected outcome is an
+// RPC failure with a status code Unavailable and a message indicating the
+// absence of available targets.
+func (s) TestEDS_NoEndpointsInResource(t *testing.T) {
+	managementServer, nodeID, _, xdsResolver := setup.ManagementServerAndResolver(t)
+
+	// Create resources on the management server, with the EDS resource
+	// containing no endpoints.
+	const serviceName = "my-service-client-side-xds"
+	const routeConfigName = "route-" + serviceName
+	const clusterName = "cluster-" + serviceName
+	const endpointsName = "endpoints-" + serviceName
+	resources := e2e.UpdateOptions{
+		NodeID:         nodeID,
+		SkipValidation: true, // Cluster resource refers to an EDS resource that is not configured.
+		Listeners:      []*v3listenerpb.Listener{e2e.DefaultClientListener(serviceName, routeConfigName)},
+		Routes:         []*v3routepb.RouteConfiguration{e2e.DefaultRouteConfig(routeConfigName, serviceName, clusterName)},
+		Clusters:       []*v3clusterpb.Cluster{e2e.DefaultCluster(clusterName, endpointsName, e2e.SecurityLevelNone)},
+		Endpoints: []*v3endpointpb.ClusterLoadAssignment{
+			e2e.EndpointResourceWithOptions(e2e.EndpointOptions{
+				ClusterName: "endpoints-" + serviceName,
+				Host:        "localhost",
+			}),
+		},
+	}
+	ctx, cancel := context.WithTimeout(context.Background(), defaultTestTimeout)
+	defer cancel()
+	if err := managementServer.Update(ctx, resources); err != nil {
+		t.Fatal(err)
+	}
+
+	// Create a ClientConn with the xds:/// scheme.
+	cc, err := grpc.NewClient(fmt.Sprintf("xds:///%s", serviceName), grpc.WithTransportCredentials(insecure.NewCredentials()), grpc.WithResolvers(xdsResolver))
+	if err != nil {
+		t.Fatalf("Failed to create a grpc channel: %v", err)
+	}
+	defer cc.Close()
+
+	// Make an RPC and verify that it fails with the expected error.
+	client := testgrpc.NewTestServiceClient(cc)
+	_, err = client.EmptyCall(ctx, &testpb.Empty{})
+	if err == nil {
+		t.Fatal("EmptyCall() succeeded, want failure")
+	}
+	if gotCode, wantCode := status.Code(err), codes.Unavailable; gotCode != wantCode {
+		t.Errorf("EmptyCall() failed with code = %v, want %s", gotCode, wantCode)
+	}
+	if gotMsg, wantMsg := err.Error(), "no targets to pick from"; !strings.Contains(gotMsg, wantMsg) {
+		t.Errorf("EmptyCall() failed with message = %q, want to contain %q", gotMsg, wantMsg)
+	}
+}