/
mux_test.go
117 lines (101 loc) · 3.68 KB
/
mux_test.go
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// Copyright The OpenTelemetry 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 test
import (
"net/http"
"net/http/httptest"
"testing"
"github.com/gorilla/mux"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"go.opentelemetry.io/contrib/instrumentation/github.com/gorilla/mux/otelmux"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/codes"
sdktrace "go.opentelemetry.io/otel/sdk/trace"
"go.opentelemetry.io/otel/sdk/trace/tracetest"
"go.opentelemetry.io/otel/trace"
)
func ok(w http.ResponseWriter, _ *http.Request) {}
func notfound(w http.ResponseWriter, _ *http.Request) {
http.Error(w, "not found", http.StatusNotFound)
}
func TestSDKIntegration(t *testing.T) {
sr := tracetest.NewSpanRecorder()
provider := sdktrace.NewTracerProvider()
provider.RegisterSpanProcessor(sr)
router := mux.NewRouter()
router.Use(otelmux.Middleware("foobar", otelmux.WithTracerProvider(provider)))
router.HandleFunc("/user/{id:[0-9]+}", ok)
router.HandleFunc("/book/{title}", ok)
r0 := httptest.NewRequest("GET", "/user/123", nil)
r1 := httptest.NewRequest("GET", "/book/foo", nil)
w := httptest.NewRecorder()
router.ServeHTTP(w, r0)
router.ServeHTTP(w, r1)
require.Len(t, sr.Ended(), 2)
assertSpan(t, sr.Ended()[0],
"/user/{id:[0-9]+}",
trace.SpanKindServer,
attribute.String("http.server_name", "foobar"),
attribute.Int("http.status_code", http.StatusOK),
attribute.String("http.method", "GET"),
attribute.String("http.target", "/user/123"),
attribute.String("http.route", "/user/{id:[0-9]+}"),
)
assertSpan(t, sr.Ended()[1],
"/book/{title}",
trace.SpanKindServer,
attribute.String("http.server_name", "foobar"),
attribute.Int("http.status_code", http.StatusOK),
attribute.String("http.method", "GET"),
attribute.String("http.target", "/book/foo"),
attribute.String("http.route", "/book/{title}"),
)
}
func TestNotFoundIsNotError(t *testing.T) {
sr := tracetest.NewSpanRecorder()
provider := sdktrace.NewTracerProvider()
provider.RegisterSpanProcessor(sr)
router := mux.NewRouter()
router.Use(otelmux.Middleware("foobar", otelmux.WithTracerProvider(provider)))
router.HandleFunc("/does/not/exist", notfound)
r0 := httptest.NewRequest("GET", "/does/not/exist", nil)
w := httptest.NewRecorder()
router.ServeHTTP(w, r0)
require.Len(t, sr.Ended(), 1)
assertSpan(t, sr.Ended()[0],
"/does/not/exist",
trace.SpanKindServer,
attribute.String("http.server_name", "foobar"),
attribute.Int("http.status_code", http.StatusNotFound),
attribute.String("http.method", "GET"),
attribute.String("http.target", "/does/not/exist"),
attribute.String("http.route", "/does/not/exist"),
)
assert.NotEqual(t, sr.Ended()[0].Status().Code, codes.Error)
}
func assertSpan(t *testing.T, span sdktrace.ReadOnlySpan, name string, kind trace.SpanKind, attrs ...attribute.KeyValue) {
assert.Equal(t, name, span.Name())
assert.Equal(t, trace.SpanKindServer, span.SpanKind())
got := make(map[attribute.Key]attribute.Value, len(span.Attributes()))
for _, a := range span.Attributes() {
got[a.Key] = a.Value
}
for _, want := range attrs {
if !assert.Contains(t, got, want.Key) {
continue
}
assert.Equal(t, got[want.Key], want.Value)
}
}