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feat(span-customizer): adds support for span customizer.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,105 @@ | ||
| // Copyright 2020 The OpenZipkin 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_test | ||
|
|
||
| import ( | ||
| "context" | ||
| "testing" | ||
|
|
||
| "github.com/openzipkin/zipkin-go" | ||
| zipkingrpc "github.com/openzipkin/zipkin-go/middleware/grpc" | ||
| service "github.com/openzipkin/zipkin-go/proto/testing" | ||
| "google.golang.org/grpc" | ||
| "google.golang.org/grpc/metadata" | ||
| "google.golang.org/grpc/stats" | ||
| ) | ||
|
|
||
| func TestGRPCClientCanAccessToPayloadAndMetadata(t *testing.T) { | ||
| tracer, flusher := createTracer(false) | ||
|
|
||
| s := grpc.NewServer() | ||
| defer s.Stop() | ||
|
|
||
| service.RegisterHelloServiceServer(s, &TestHelloService{ | ||
| responseHeader: metadata.Pairs("test_key", "test_value_1"), | ||
| responseTrailer: metadata.Pairs("test_key", "test_value_2"), | ||
| }) | ||
|
|
||
| dialer := initListener(s) | ||
|
|
||
| ctx := context.Background() | ||
| conn, err := grpc.DialContext( | ||
| ctx, | ||
| "bufnet", | ||
| grpc.WithContextDialer(dialer), | ||
| grpc.WithInsecure(), | ||
| grpc.WithStatsHandler(zipkingrpc.NewClientHandler( | ||
| tracer, | ||
| zipkingrpc.WithClientOutPayloadParser(func(outPayload *stats.OutPayload, span zipkin.SpanCustomizer) { | ||
| m, ok := outPayload.Payload.(*service.HelloRequest) | ||
| if !ok { | ||
| t.Fatal("failed to cast the payload as a service.HelloResponse") | ||
| } | ||
| if want, have := "Hello", m.Payload; want != have { | ||
| t.Errorf("incorrect payload: want %q, have %q", want, have) | ||
| } | ||
| }), | ||
| zipkingrpc.WithClientOutHeaderParser(func(outHeader *stats.OutHeader, span zipkin.SpanCustomizer) { | ||
| if want, have := "test_value", outHeader.Header.Get("test_key")[0]; want != have { | ||
| t.Errorf("incorrect header value, want %q, have %q", want, have) | ||
| } | ||
| }), | ||
| zipkingrpc.WithClientInPayloadParser(func(inPayload *stats.InPayload, span zipkin.SpanCustomizer) { | ||
| m, ok := inPayload.Payload.(*service.HelloResponse) | ||
| if !ok { | ||
| t.Fatal("failed to cast the payload as a service.HelloRequest") | ||
| } | ||
| if want, have := "World", m.Payload; want != have { | ||
| t.Errorf("incorrect payload: want %q, have %q", want, have) | ||
| } | ||
| }), | ||
| zipkingrpc.WithClientInHeaderParser(func(inHeader *stats.InHeader, span zipkin.SpanCustomizer) { | ||
| if want, have := "test_value_1", inHeader.Header.Get("test_key")[0]; want != have { | ||
| t.Errorf("incorrect header value, want %q, have %q", want, have) | ||
| } | ||
| }), | ||
| zipkingrpc.WithClientInTrailerParser(func(inTrailer *stats.InTrailer, span zipkin.SpanCustomizer) { | ||
| if want, have := "test_value_2", inTrailer.Trailer.Get("test_key")[0]; want != have { | ||
| t.Errorf("incorrect header value, want %q, have %q", want, have) | ||
| } | ||
| }), | ||
| )), | ||
| ) | ||
|
|
||
| if err != nil { | ||
| t.Fatalf("Failed to dial bufnet: %v", err) | ||
| } | ||
| defer conn.Close() | ||
|
|
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| client := service.NewHelloServiceClient(conn) | ||
|
|
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| ctx = metadata.NewOutgoingContext(ctx, metadata.Pairs("test_key", "test_value")) | ||
| _, err = client.Hello(ctx, &service.HelloRequest{ | ||
| Payload: "Hello", | ||
| }) | ||
| if err != nil { | ||
| t.Fatalf("unexpected error: %v", err) | ||
| } | ||
|
|
||
| spans := flusher() | ||
| if want, have := 1, len(spans); want != have { | ||
| t.Errorf("unexpected number of spans, want %d, have %d", want, have) | ||
| } | ||
| } |
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