mirror of
https://github.com/rclone/rclone.git
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179 lines
5.3 KiB
Go
179 lines
5.3 KiB
Go
// Copyright 2017 Google Inc. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package trace
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import (
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"io/ioutil"
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"log"
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"net"
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"net/http"
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"strings"
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"testing"
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pb "cloud.google.com/go/trace/testdata/helloworld"
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"golang.org/x/net/context"
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"google.golang.org/grpc"
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)
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func TestGRPCInterceptors(t *testing.T) {
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tc := newTestClient(&noopTransport{})
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// default sampling with global=1.
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parent := tc.SpanFromHeader("parent", "7f27601f17b7a2873739efd18ff83872/123;o=1")
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testGRPCInterceptor(t, tc, parent, func(t *testing.T, out, in *Span) {
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if in == nil {
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t.Fatalf("missing span in the incoming context")
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}
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if got, want := in.TraceID(), out.TraceID(); got != want {
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t.Errorf("incoming call is not tracing the outgoing trace; TraceID = %q; want %q", got, want)
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}
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if !in.Traced() {
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t.Errorf("incoming span is not traced; want traced")
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}
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})
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// default sampling with global=0.
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parent = tc.SpanFromHeader("parent", "7f27601f17b7a2873739efd18ff83872/123;o=0")
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testGRPCInterceptor(t, tc, parent, func(t *testing.T, out, in *Span) {
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if in == nil {
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t.Fatalf("missing span in the incoming context")
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}
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if got, want := in.TraceID(), out.TraceID(); got != want {
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t.Errorf("incoming call is not tracing the outgoing trace; TraceID = %q; want %q", got, want)
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}
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if in.Traced() {
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t.Errorf("incoming span is traced; want not traced")
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}
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})
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// sampling all with global=1.
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all, _ := NewLimitedSampler(1.0, 1<<32)
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tc.SetSamplingPolicy(all)
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parent = tc.SpanFromHeader("parent", "7f27601f17b7a2873739efd18ff83872/123;o=1")
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testGRPCInterceptor(t, tc, parent, func(t *testing.T, out, in *Span) {
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if in == nil {
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t.Fatalf("missing span in the incoming context")
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}
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if got, want := in.TraceID(), out.TraceID(); got != want {
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t.Errorf("incoming call is not tracing the outgoing trace; TraceID = %q; want %q", got, want)
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}
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if !in.Traced() {
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t.Errorf("incoming span is not traced; want traced")
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}
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})
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// sampling none with global=1.
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none, _ := NewLimitedSampler(0, 0)
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tc.SetSamplingPolicy(none)
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parent = tc.SpanFromHeader("parent", "7f27601f17b7a2873739efd18ff83872/123;o=1")
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testGRPCInterceptor(t, tc, parent, func(t *testing.T, out, in *Span) {
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if in == nil {
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t.Fatalf("missing span in the incoming context")
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}
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if got, want := in.TraceID(), out.TraceID(); got != want {
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t.Errorf("incoming call is not tracing the outgoing trace; TraceID = %q; want %q", got, want)
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}
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if in.Traced() {
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t.Errorf("incoming span is traced; want not traced")
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}
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})
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// sampling all with no parent span.
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tc.SetSamplingPolicy(all)
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testGRPCInterceptor(t, tc, nil, func(t *testing.T, out, in *Span) {
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if in == nil {
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t.Fatalf("missing span in the incoming context")
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}
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if in.TraceID() == "" {
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t.Errorf("incoming call TraceID is empty")
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}
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if !in.Traced() {
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t.Errorf("incoming span is not traced; want traced")
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}
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})
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// sampling none with no parent span.
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tc.SetSamplingPolicy(none)
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testGRPCInterceptor(t, tc, nil, func(t *testing.T, out, in *Span) {
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if in == nil {
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t.Fatalf("missing span in the incoming context")
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}
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if in.TraceID() == "" {
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t.Errorf("incoming call TraceID is empty")
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}
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if in.Traced() {
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t.Errorf("incoming span is traced; want not traced")
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}
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})
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}
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func testGRPCInterceptor(t *testing.T, tc *Client, parent *Span, assert func(t *testing.T, out, in *Span)) {
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incomingCh := make(chan *Span, 1)
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addrCh := make(chan net.Addr, 1)
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go func() {
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lis, err := net.Listen("tcp", "")
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if err != nil {
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t.Fatalf("Failed to listen: %v", err)
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}
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addrCh <- lis.Addr()
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s := grpc.NewServer(grpc.UnaryInterceptor(tc.GRPCServerInterceptor()))
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pb.RegisterGreeterServer(s, &grpcServer{
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fn: func(ctx context.Context, in *pb.HelloRequest) (*pb.HelloReply, error) {
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incomingCh <- FromContext(ctx)
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return &pb.HelloReply{}, nil
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},
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})
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if err := s.Serve(lis); err != nil {
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t.Fatalf("Failed to serve: %v", err)
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}
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}()
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addr := <-addrCh
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conn, err := grpc.Dial(addr.String(), grpc.WithInsecure(), grpc.WithUnaryInterceptor(tc.GRPCClientInterceptor()))
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if err != nil {
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t.Fatalf("Did not connect: %v", err)
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}
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defer conn.Close()
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c := pb.NewGreeterClient(conn)
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outgoingCtx := NewContext(context.Background(), parent)
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_, err = c.SayHello(outgoingCtx, &pb.HelloRequest{})
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if err != nil {
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log.Fatalf("Could not SayHello: %v", err)
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}
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assert(t, parent, <-incomingCh)
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}
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type noopTransport struct{}
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func (rt *noopTransport) RoundTrip(req *http.Request) (*http.Response, error) {
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resp := &http.Response{
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Status: "200 OK",
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StatusCode: 200,
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Body: ioutil.NopCloser(strings.NewReader("{}")),
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}
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return resp, nil
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}
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type grpcServer struct {
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fn func(ctx context.Context, in *pb.HelloRequest) (*pb.HelloReply, error)
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}
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func (s *grpcServer) SayHello(ctx context.Context, in *pb.HelloRequest) (*pb.HelloReply, error) {
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return s.fn(ctx, in)
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}
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