101 lines
2.5 KiB
Go
101 lines
2.5 KiB
Go
package opentelemetry
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import (
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"compress/gzip"
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"context"
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"encoding/json"
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"io"
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"net/http"
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"net/http/httptest"
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"strings"
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"testing"
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"time"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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mtracing "github.com/traefik/traefik/v2/pkg/middlewares/tracing"
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"github.com/traefik/traefik/v2/pkg/tracing"
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"go.opentelemetry.io/collector/pdata/ptrace/ptraceotlp"
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)
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func TestTracing(t *testing.T) {
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tests := []struct {
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desc string
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headers map[string]string
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assertFn func(*testing.T, string)
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}{
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{
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desc: "service name and version",
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assertFn: func(t *testing.T, trace string) {
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t.Helper()
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assert.Regexp(t, `({"key":"service.name","value":{"stringValue":"traefik"}})`, trace)
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assert.Regexp(t, `({"key":"service.version","value":{"stringValue":"dev"}})`, trace)
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},
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},
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{
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desc: "context propagation",
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headers: map[string]string{
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"traceparent": "00-00000000000000000000000000000001-0000000000000001-01",
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"tracestate": "foo=bar",
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},
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assertFn: func(t *testing.T, trace string) {
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t.Helper()
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assert.Regexp(t, `("traceId":"00000000000000000000000000000001")`, trace)
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assert.Regexp(t, `("parentSpanId":"0000000000000001")`, trace)
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assert.Regexp(t, `("traceState":"foo=bar")`, trace)
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},
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},
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}
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traceCh := make(chan string)
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collector := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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gzr, err := gzip.NewReader(r.Body)
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require.NoError(t, err)
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body, err := io.ReadAll(gzr)
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require.NoError(t, err)
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req := ptraceotlp.NewExportRequest()
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err = req.UnmarshalProto(body)
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require.NoError(t, err)
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marshalledReq, err := json.Marshal(req)
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require.NoError(t, err)
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traceCh <- string(marshalledReq)
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}))
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t.Cleanup(collector.Close)
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newTracing, err := tracing.NewTracing("", 0, &Config{
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Insecure: true,
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Address: strings.TrimPrefix(collector.URL, "http://"),
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})
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require.NoError(t, err)
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t.Cleanup(newTracing.Close)
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epHandler := mtracing.NewEntryPoint(context.Background(), newTracing, "test", http.NotFoundHandler())
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for _, test := range tests {
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t.Run(test.desc, func(t *testing.T) {
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req := httptest.NewRequest(http.MethodGet, "http://www.test.com", nil)
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for k, v := range test.headers {
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req.Header.Set(k, v)
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}
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rw := httptest.NewRecorder()
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epHandler.ServeHTTP(rw, req)
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select {
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case <-time.After(10 * time.Second):
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t.Error("Trace not exported")
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case trace := <-traceCh:
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assert.Equal(t, http.StatusNotFound, rw.Code)
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test.assertFn(t, trace)
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}
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})
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}
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}
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