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

server_test.go

@@ -0,0 +1,235 @@
+/*
+ *
+ * Copyright 2016 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 grpc
+
+import (
+	"context"
+	"net"
+	"reflect"
+	"strconv"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/google/go-cmp/cmp"
+	"google.golang.org/grpc/internal/transport"
+	"google.golang.org/grpc/status"
+)
+
+type emptyServiceServer any
+
+type testServer struct{}
+
+func errorDesc(err error) string {
+	if s, ok := status.FromError(err); ok {
+		return s.Message()
+	}
+	return err.Error()
+}
+
+func (s) TestStopBeforeServe(t *testing.T) {
+	lis, err := net.Listen("tcp", "localhost:0")
+	if err != nil {
+		t.Fatalf("failed to create listener: %v", err)
+	}
+
+	server := NewServer()
+	server.Stop()
+	err = server.Serve(lis)
+	if err != ErrServerStopped {
+		t.Fatalf("server.Serve() error = %v, want %v", err, ErrServerStopped)
+	}
+
+	// server.Serve is responsible for closing the listener, even if the
+	// server was already stopped.
+	err = lis.Close()
+	if got, want := errorDesc(err), "use of closed"; !strings.Contains(got, want) {
+		t.Errorf("Close() error = %q, want %q", got, want)
+	}
+}
+
+func (s) TestGracefulStop(t *testing.T) {
+
+	lis, err := net.Listen("tcp", "localhost:0")
+	if err != nil {
+		t.Fatalf("failed to create listener: %v", err)
+	}
+
+	server := NewServer()
+	go func() {
+		// make sure Serve() is called
+		time.Sleep(time.Millisecond * 500)
+		server.GracefulStop()
+	}()
+
+	err = server.Serve(lis)
+	if err != nil {
+		t.Fatalf("Serve() returned non-nil error on GracefulStop: %v", err)
+	}
+}
+
+func (s) TestGetServiceInfo(t *testing.T) {
+	testSd := ServiceDesc{
+		ServiceName: "grpc.testing.EmptyService",
+		HandlerType: (*emptyServiceServer)(nil),
+		Methods: []MethodDesc{
+			{
+				MethodName: "EmptyCall",
+				Handler:    nil,
+			},
+		},
+		Streams: []StreamDesc{
+			{
+				StreamName:    "EmptyStream",
+				Handler:       nil,
+				ServerStreams: false,
+				ClientStreams: true,
+			},
+		},
+		Metadata: []int{0, 2, 1, 3},
+	}
+
+	server := NewServer()
+	server.RegisterService(&testSd, &testServer{})
+
+	info := server.GetServiceInfo()
+	want := map[string]ServiceInfo{
+		"grpc.testing.EmptyService": {
+			Methods: []MethodInfo{
+				{
+					Name:           "EmptyCall",
+					IsClientStream: false,
+					IsServerStream: false,
+				},
+				{
+					Name:           "EmptyStream",
+					IsClientStream: true,
+					IsServerStream: false,
+				}},
+			Metadata: []int{0, 2, 1, 3},
+		},
+	}
+
+	if !reflect.DeepEqual(info, want) {
+		t.Errorf("GetServiceInfo() = %+v, want %+v", info, want)
+	}
+}
+
+func (s) TestRetryChainedInterceptor(t *testing.T) {
+	var records []int
+	i1 := func(ctx context.Context, req any, _ *UnaryServerInfo, handler UnaryHandler) (resp any, err error) {
+		records = append(records, 1)
+		// call handler twice to simulate a retry here.
+		handler(ctx, req)
+		return handler(ctx, req)
+	}
+	i2 := func(ctx context.Context, req any, _ *UnaryServerInfo, handler UnaryHandler) (resp any, err error) {
+		records = append(records, 2)
+		return handler(ctx, req)
+	}
+	i3 := func(ctx context.Context, req any, _ *UnaryServerInfo, handler UnaryHandler) (resp any, err error) {
+		records = append(records, 3)
+		return handler(ctx, req)
+	}
+
+	ii := chainUnaryInterceptors([]UnaryServerInterceptor{i1, i2, i3})
+
+	handler := func(context.Context, any) (any, error) {
+		return nil, nil
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), defaultTestTimeout)
+	defer cancel()
+
+	ii(ctx, nil, nil, handler)
+	if !cmp.Equal(records, []int{1, 2, 3, 2, 3}) {
+		t.Fatalf("retry failed on chained interceptors: %v", records)
+	}
+}
+
+func (s) TestStreamContext(t *testing.T) {
+	expectedStream := &transport.ServerStream{}
+	ctx, cancel := context.WithTimeout(context.Background(), defaultTestTimeout)
+	defer cancel()
+	ctx = NewContextWithServerTransportStream(ctx, expectedStream)
+
+	s := ServerTransportStreamFromContext(ctx)
+	stream, ok := s.(*transport.ServerStream)
+	if !ok || expectedStream != stream {
+		t.Fatalf("GetStreamFromContext(%v) = %v, %t, want: %v, true", ctx, stream, ok, expectedStream)
+	}
+}
+
+func BenchmarkChainUnaryInterceptor(b *testing.B) {
+	ctx, cancel := context.WithTimeout(context.Background(), defaultTestTimeout)
+	defer cancel()
+	for _, n := range []int{1, 3, 5, 10} {
+		n := n
+		b.Run(strconv.Itoa(n), func(b *testing.B) {
+			interceptors := make([]UnaryServerInterceptor, 0, n)
+			for i := 0; i < n; i++ {
+				interceptors = append(interceptors, func(
+					ctx context.Context, req any, _ *UnaryServerInfo, handler UnaryHandler,
+				) (any, error) {
+					return handler(ctx, req)
+				})
+			}
+
+			s := NewServer(ChainUnaryInterceptor(interceptors...))
+			b.ReportAllocs()
+			b.ResetTimer()
+			for i := 0; i < b.N; i++ {
+				if _, err := s.opts.unaryInt(ctx, nil, nil,
+					func(context.Context, any) (any, error) {
+						return nil, nil
+					},
+				); err != nil {
+					b.Fatal(err)
+				}
+			}
+		})
+	}
+}
+
+func BenchmarkChainStreamInterceptor(b *testing.B) {
+	for _, n := range []int{1, 3, 5, 10} {
+		n := n
+		b.Run(strconv.Itoa(n), func(b *testing.B) {
+			interceptors := make([]StreamServerInterceptor, 0, n)
+			for i := 0; i < n; i++ {
+				interceptors = append(interceptors, func(
+					srv any, ss ServerStream, _ *StreamServerInfo, handler StreamHandler,
+				) error {
+					return handler(srv, ss)
+				})
+			}
+
+			s := NewServer(ChainStreamInterceptor(interceptors...))
+			b.ReportAllocs()
+			b.ResetTimer()
+			for i := 0; i < b.N; i++ {
+				if err := s.opts.streamInt(nil, nil, nil, func(any, ServerStream) error {
+					return nil
+				}); err != nil {
+					b.Fatal(err)
+				}
+			}
+		})
+	}
+}