transfer.sh/vendor/go.opencensus.io/plugin/ochttp/propagation_test.go
2019-03-17 20:19:56 +01:00

74 lines
2.1 KiB
Go

// Copyright 2018, OpenCensus 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 ochttp
import (
"context"
"fmt"
"io/ioutil"
"net/http"
"net/http/httptest"
"testing"
"go.opencensus.io/plugin/ochttp/propagation/b3"
"go.opencensus.io/plugin/ochttp/propagation/tracecontext"
"go.opencensus.io/trace"
"go.opencensus.io/trace/propagation"
)
func TestRoundTripAllFormats(t *testing.T) {
// TODO: test combinations of different formats for chains of calls
formats := []propagation.HTTPFormat{
&b3.HTTPFormat{},
&tracecontext.HTTPFormat{},
}
ctx := context.Background()
ctx, span := trace.StartSpan(ctx, "test", trace.WithSampler(trace.AlwaysSample()))
sc := span.SpanContext()
wantStr := fmt.Sprintf("trace_id=%x, span_id=%x, options=%d", sc.TraceID, sc.SpanID, sc.TraceOptions)
defer span.End()
for _, format := range formats {
srv := httptest.NewServer(http.HandlerFunc(func(resp http.ResponseWriter, req *http.Request) {
sc, ok := format.SpanContextFromRequest(req)
if !ok {
resp.WriteHeader(http.StatusBadRequest)
}
fmt.Fprintf(resp, "trace_id=%x, span_id=%x, options=%d", sc.TraceID, sc.SpanID, sc.TraceOptions)
}))
req, err := http.NewRequest("GET", srv.URL, nil)
if err != nil {
t.Fatal(err)
}
format.SpanContextToRequest(span.SpanContext(), req)
resp, err := http.DefaultClient.Do(req)
if err != nil {
t.Fatal(err)
}
if resp.StatusCode != 200 {
t.Fatal(resp.Status)
}
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
t.Fatal(err)
}
resp.Body.Close()
if got, want := string(body), wantStr; got != want {
t.Errorf("%s; want %s", got, want)
}
srv.Close()
}
}