138 lines
4.1 KiB
Go
138 lines
4.1 KiB
Go
package service
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import (
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"context"
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"net/http"
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"net/http/httptest"
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"testing"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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"github.com/traefik/traefik/v3/pkg/tracing"
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"go.opentelemetry.io/otel/attribute"
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"go.opentelemetry.io/otel/codes"
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"go.opentelemetry.io/otel/trace"
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"go.opentelemetry.io/otel/trace/embedded"
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)
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func TestTracingRoundTripper(t *testing.T) {
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type expected struct {
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name string
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attributes []attribute.KeyValue
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}
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testCases := []struct {
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desc string
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expected []expected
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}{
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{
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desc: "basic test",
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expected: []expected{
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{
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name: "initial",
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attributes: []attribute.KeyValue{
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attribute.String("span.kind", "unspecified"),
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},
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},
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{
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name: "ReverseProxy",
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attributes: []attribute.KeyValue{
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attribute.String("span.kind", "client"),
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attribute.String("http.request.method", "GET"),
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attribute.String("network.protocol.version", "1.1"),
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attribute.String("url.full", "http://www.test.com/search?q=Opentelemetry"),
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attribute.String("url.scheme", "http"),
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attribute.String("user_agent.original", "reverse-test"),
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attribute.String("network.peer.address", ""),
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attribute.String("server.address", "www.test.com"),
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attribute.String("network.peer.port", "80"),
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attribute.Int64("server.port", int64(80)),
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attribute.StringSlice("http.request.header.x-foo", []string{"foo", "bar"}),
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attribute.Int64("http.response.status_code", int64(404)),
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attribute.StringSlice("http.response.header.x-bar", []string{"foo", "bar"}),
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},
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},
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},
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},
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}
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for _, test := range testCases {
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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/search?q=Opentelemetry", nil)
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req.RemoteAddr = "10.0.0.1:1234"
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req.Header.Set("User-Agent", "reverse-test")
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req.Header.Set("X-Forwarded-Proto", "http")
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req.Header.Set("X-Foo", "foo")
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req.Header.Add("X-Foo", "bar")
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mockTracer := &mockTracer{}
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tracer := tracing.NewTracer(mockTracer, []string{"X-Foo"}, []string{"X-Bar"})
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initialCtx, initialSpan := tracer.Start(req.Context(), "initial")
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defer initialSpan.End()
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req = req.WithContext(initialCtx)
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tracingRoundTripper := newTracingRoundTripper(roundTripperFn(func(req *http.Request) (*http.Response, error) {
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return &http.Response{
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Header: map[string][]string{
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"X-Bar": {"foo", "bar"},
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},
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StatusCode: http.StatusNotFound,
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}, nil
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}))
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_, err := tracingRoundTripper.RoundTrip(req)
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require.NoError(t, err)
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for i, span := range mockTracer.spans {
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assert.Equal(t, test.expected[i].name, span.name)
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assert.Equal(t, test.expected[i].attributes, span.attributes)
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}
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})
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}
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}
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type mockTracer struct {
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embedded.Tracer
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spans []*mockSpan
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}
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var _ trace.Tracer = &mockTracer{}
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func (t *mockTracer) Start(ctx context.Context, name string, opts ...trace.SpanStartOption) (context.Context, trace.Span) {
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config := trace.NewSpanStartConfig(opts...)
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span := &mockSpan{}
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span.SetName(name)
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span.SetAttributes(attribute.String("span.kind", config.SpanKind().String()))
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span.SetAttributes(config.Attributes()...)
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t.spans = append(t.spans, span)
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return trace.ContextWithSpan(ctx, span), span
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}
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// mockSpan is an implementation of Span that preforms no operations.
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type mockSpan struct {
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embedded.Span
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name string
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attributes []attribute.KeyValue
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}
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var _ trace.Span = &mockSpan{}
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func (*mockSpan) SpanContext() trace.SpanContext {
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return trace.NewSpanContext(trace.SpanContextConfig{TraceID: trace.TraceID{1}, SpanID: trace.SpanID{1}})
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}
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func (*mockSpan) IsRecording() bool { return false }
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func (s *mockSpan) SetStatus(_ codes.Code, _ string) {}
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func (s *mockSpan) SetAttributes(kv ...attribute.KeyValue) {
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s.attributes = append(s.attributes, kv...)
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}
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func (s *mockSpan) End(...trace.SpanEndOption) {}
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func (s *mockSpan) RecordError(_ error, _ ...trace.EventOption) {}
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func (s *mockSpan) AddEvent(_ string, _ ...trace.EventOption) {}
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func (s *mockSpan) SetName(name string) { s.name = name }
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func (s *mockSpan) TracerProvider() trace.TracerProvider {
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return nil
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}
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