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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package otelhttptrace_test
import (
"context"
"net/http"
"net/http/httptest"
"strings"
"testing"
"github.com/google/go-cmp/cmp"
"go.opentelemetry.io/contrib/instrumentation/net/http/httptrace/otelhttptrace"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/baggage"
"go.opentelemetry.io/otel/propagation"
semconv "go.opentelemetry.io/otel/semconv/v1.20.0"
"go.opentelemetry.io/otel/trace"
"go.opentelemetry.io/otel/trace/noop"
)
func TestRoundtrip(t *testing.T) {
tr := noop.NewTracerProvider().Tracer("httptrace/client")
var expectedAttrs map[attribute.Key]string
expectedCorrs := map[string]string{"foo": "bar"}
props := otelhttptrace.WithPropagators(propagation.NewCompositeTextMapPropagator(propagation.TraceContext{}, propagation.Baggage{}))
// Mock http server
ts := httptest.NewServer(
http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
attrs, corrs, span := otelhttptrace.Extract(r.Context(), r, props)
actualAttrs := make(map[attribute.Key]string)
for _, attr := range attrs {
if attr.Key == semconv.NetSockPeerPortKey {
// Peer port will be non-deterministic
continue
}
actualAttrs[attr.Key] = attr.Value.Emit()
}
if diff := cmp.Diff(actualAttrs, expectedAttrs); diff != "" {
t.Fatalf("[TestRoundtrip] Attributes are different: %v", diff)
}
actualCorrs := make(map[string]string)
for _, corr := range corrs.Members() {
actualCorrs[corr.Key()] = corr.Value()
}
if diff := cmp.Diff(actualCorrs, expectedCorrs); diff != "" {
t.Fatalf("[TestRoundtrip] Correlations are different: %v", diff)
}
if !span.IsValid() {
t.Fatalf("[TestRoundtrip] Invalid span extracted: %v", span)
}
_, err := w.Write([]byte("OK"))
if err != nil {
t.Fatal(err)
}
}),
)
defer ts.Close()
address := ts.Listener.Addr()
hp := strings.Split(address.String(), ":")
expectedAttrs = map[attribute.Key]string{
semconv.NetHostNameKey: hp[0],
semconv.NetHostPortKey: hp[1],
semconv.NetProtocolVersionKey: "1.1",
semconv.HTTPMethodKey: "GET",
semconv.HTTPSchemeKey: "http",
semconv.HTTPTargetKey: "/",
semconv.HTTPRequestContentLengthKey: "3",
semconv.NetSockPeerAddrKey: hp[0],
semconv.NetTransportKey: "ip_tcp",
semconv.UserAgentOriginalKey: "Go-http-client/1.1",
}
client := ts.Client()
ctx := context.Background()
sc := trace.NewSpanContext(trace.SpanContextConfig{
TraceID: trace.TraceID{0x01},
SpanID: trace.SpanID{0x01},
})
ctx = trace.ContextWithRemoteSpanContext(ctx, sc)
err := func(ctx context.Context) error {
ctx, span := tr.Start(ctx, "test")
defer span.End()
bag, _ := baggage.Parse("foo=bar")
ctx = baggage.ContextWithBaggage(ctx, bag)
req, _ := http.NewRequest("GET", ts.URL, strings.NewReader("foo"))
otelhttptrace.Inject(ctx, req, props)
res, err := client.Do(req)
if err != nil {
t.Fatalf("Request failed: %s", err.Error())
}
_ = res.Body.Close()
return nil
}(ctx)
if err != nil {
panic("unexpected error in http request: " + err.Error())
}
}
func TestSpecifyPropagators(t *testing.T) {
tr := noop.NewTracerProvider().Tracer("httptrace/client")
expectedCorrs := map[string]string{"foo": "bar"}
// Mock http server
ts := httptest.NewServer(
http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
_, corrs, span := otelhttptrace.Extract(r.Context(), r, otelhttptrace.WithPropagators(propagation.Baggage{}))
actualCorrs := make(map[string]string)
for _, corr := range corrs.Members() {
actualCorrs[corr.Key()] = corr.Value()
}
if diff := cmp.Diff(actualCorrs, expectedCorrs); diff != "" {
t.Fatalf("[TestRoundtrip] Correlations are different: %v", diff)
}
if span.IsValid() {
t.Fatalf("[TestRoundtrip] valid span extracted, expected none: %v", span)
}
_, err := w.Write([]byte("OK"))
if err != nil {
t.Fatal(err)
}
}),
)
defer ts.Close()
client := ts.Client()
err := func(ctx context.Context) error {
ctx, span := tr.Start(ctx, "test")
defer span.End()
bag, _ := baggage.Parse("foo=bar")
ctx = baggage.ContextWithBaggage(ctx, bag)
req, _ := http.NewRequest("GET", ts.URL, nil)
otelhttptrace.Inject(ctx, req, otelhttptrace.WithPropagators(propagation.Baggage{}))
res, err := client.Do(req)
if err != nil {
t.Fatalf("Request failed: %s", err.Error())
}
_ = res.Body.Close()
return nil
}(context.Background())
if err != nil {
panic("unexpected error in http request: " + err.Error())
}
}
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