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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package otelrestful_test
import (
"context"
"net/http"
"net/http/httptest"
"testing"
"github.com/emicklei/go-restful/v3"
"github.com/stretchr/testify/assert"
"go.opentelemetry.io/contrib/instrumentation/github.com/emicklei/go-restful/otelrestful"
b3prop "go.opentelemetry.io/contrib/propagators/b3"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/propagation"
oteltrace "go.opentelemetry.io/otel/trace"
"go.opentelemetry.io/otel/trace/noop"
)
const tracerName = "go.opentelemetry.io/contrib/instrumentation/github.com/emicklei/go-restful/otelrestful"
func TestGetSpanNotInstrumented(t *testing.T) {
handlerFunc := func(req *restful.Request, resp *restful.Response) {
span := oteltrace.SpanFromContext(req.Request.Context())
ok := !span.SpanContext().IsValid()
assert.True(t, ok)
resp.WriteHeader(http.StatusOK)
}
ws := &restful.WebService{}
ws.Route(ws.GET("/user/{id}").To(handlerFunc))
container := restful.NewContainer()
container.Add(ws)
r := httptest.NewRequest("GET", "/user/123", nil)
w := httptest.NewRecorder()
container.ServeHTTP(w, r)
}
func TestPropagationWithGlobalPropagators(t *testing.T) {
defer func(p propagation.TextMapPropagator) {
otel.SetTextMapPropagator(p)
}(otel.GetTextMapPropagator())
provider := noop.NewTracerProvider()
otel.SetTextMapPropagator(propagation.TraceContext{})
r := httptest.NewRequest("GET", "/user/123", nil)
w := httptest.NewRecorder()
ctx := context.Background()
sc := oteltrace.NewSpanContext(oteltrace.SpanContextConfig{
TraceID: oteltrace.TraceID{0x01},
SpanID: oteltrace.SpanID{0x01},
})
ctx = oteltrace.ContextWithRemoteSpanContext(ctx, sc)
ctx, _ = provider.Tracer(tracerName).Start(ctx, "test")
otel.GetTextMapPropagator().Inject(ctx, propagation.HeaderCarrier(r.Header))
handlerFunc := func(req *restful.Request, resp *restful.Response) {
span := oteltrace.SpanFromContext(req.Request.Context())
assert.Equal(t, sc.TraceID(), span.SpanContext().TraceID())
assert.Equal(t, sc.SpanID(), span.SpanContext().SpanID())
w.WriteHeader(http.StatusOK)
}
ws := &restful.WebService{}
ws.Route(ws.GET("/user/{id}").To(handlerFunc))
container := restful.NewContainer()
container.Filter(otelrestful.OTelFilter("foobar", otelrestful.WithTracerProvider(provider)))
container.Add(ws)
container.ServeHTTP(w, r)
}
func TestPropagationWithCustomPropagators(t *testing.T) {
provider := noop.NewTracerProvider()
b3 := b3prop.New()
r := httptest.NewRequest("GET", "/user/123", nil)
w := httptest.NewRecorder()
ctx := context.Background()
sc := oteltrace.NewSpanContext(oteltrace.SpanContextConfig{
TraceID: oteltrace.TraceID{0x01},
SpanID: oteltrace.SpanID{0x01},
})
ctx = oteltrace.ContextWithRemoteSpanContext(ctx, sc)
ctx, _ = provider.Tracer(tracerName).Start(ctx, "test")
b3.Inject(ctx, propagation.HeaderCarrier(r.Header))
handlerFunc := func(req *restful.Request, resp *restful.Response) {
span := oteltrace.SpanFromContext(req.Request.Context())
assert.Equal(t, sc.TraceID(), span.SpanContext().TraceID())
assert.Equal(t, sc.SpanID(), span.SpanContext().SpanID())
w.WriteHeader(http.StatusOK)
}
ws := &restful.WebService{}
ws.Route(ws.GET("/user/{id}").To(handlerFunc))
container := restful.NewContainer()
container.Filter(otelrestful.OTelFilter("foobar",
otelrestful.WithTracerProvider(provider),
otelrestful.WithPropagators(b3)))
container.Add(ws)
container.ServeHTTP(w, r)
}
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