136 lines
4.7 KiB
Go
136 lines
4.7 KiB
Go
package tracing
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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/opentracing/opentracing-go/ext"
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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/v2/pkg/tracing"
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)
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func TestNewForwarder(t *testing.T) {
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type expected struct {
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Tags map[string]interface{}
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OperationName string
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}
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testCases := []struct {
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desc string
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spanNameLimit int
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tracing *trackingBackenMock
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service string
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router string
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expected expected
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}{
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{
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desc: "Simple Forward Tracer without truncation and hashing",
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spanNameLimit: 101,
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tracing: &trackingBackenMock{
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tracer: &MockTracer{Span: &MockSpan{Tags: make(map[string]interface{})}},
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},
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service: "some-service.domain.tld",
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router: "some-service.domain.tld",
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expected: expected{
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Tags: map[string]interface{}{
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"http.host": "www.test.com",
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"http.method": "GET",
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"http.url": "http://www.test.com/toto",
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"service.name": "some-service.domain.tld",
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"router.name": "some-service.domain.tld",
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"span.kind": ext.SpanKindRPCClientEnum,
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},
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OperationName: "forward some-service.domain.tld/some-service.domain.tld",
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},
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},
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{
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desc: "Simple Forward Tracer with truncation and hashing",
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spanNameLimit: 101,
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tracing: &trackingBackenMock{
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tracer: &MockTracer{Span: &MockSpan{Tags: make(map[string]interface{})}},
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},
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service: "some-service-100.slug.namespace.environment.domain.tld",
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router: "some-service-100.slug.namespace.environment.domain.tld",
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expected: expected{
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Tags: map[string]interface{}{
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"http.host": "www.test.com",
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"http.method": "GET",
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"http.url": "http://www.test.com/toto",
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"service.name": "some-service-100.slug.namespace.environment.domain.tld",
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"router.name": "some-service-100.slug.namespace.environment.domain.tld",
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"span.kind": ext.SpanKindRPCClientEnum,
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},
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OperationName: "forward some-service-100.slug.namespace.enviro.../some-service-100.slug.namespace.enviro.../bc4a0d48",
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},
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},
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{
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desc: "Exactly 101 chars",
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spanNameLimit: 101,
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tracing: &trackingBackenMock{
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tracer: &MockTracer{Span: &MockSpan{Tags: make(map[string]interface{})}},
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},
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service: "some-service1.namespace.environment.domain.tld",
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router: "some-service1.namespace.environment.domain.tld",
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expected: expected{
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Tags: map[string]interface{}{
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"http.host": "www.test.com",
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"http.method": "GET",
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"http.url": "http://www.test.com/toto",
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"service.name": "some-service1.namespace.environment.domain.tld",
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"router.name": "some-service1.namespace.environment.domain.tld",
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"span.kind": ext.SpanKindRPCClientEnum,
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},
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OperationName: "forward some-service1.namespace.environment.domain.tld/some-service1.namespace.environment.domain.tld",
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},
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},
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{
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desc: "More than 101 chars",
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spanNameLimit: 101,
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tracing: &trackingBackenMock{
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tracer: &MockTracer{Span: &MockSpan{Tags: make(map[string]interface{})}},
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},
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service: "some-service1.frontend.namespace.environment.domain.tld",
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router: "some-service1.backend.namespace.environment.domain.tld",
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expected: expected{
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Tags: map[string]interface{}{
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"http.host": "www.test.com",
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"http.method": "GET",
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"http.url": "http://www.test.com/toto",
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"service.name": "some-service1.frontend.namespace.environment.domain.tld",
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"router.name": "some-service1.backend.namespace.environment.domain.tld",
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"span.kind": ext.SpanKindRPCClientEnum,
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},
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OperationName: "forward some-service1.frontend.namespace.envir.../some-service1.backend.namespace.enviro.../fa49dd23",
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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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newTracing, err := tracing.NewTracing("", test.spanNameLimit, test.tracing)
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require.NoError(t, err)
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req := httptest.NewRequest(http.MethodGet, "http://www.test.com/toto", nil)
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req = req.WithContext(tracing.WithTracing(req.Context(), newTracing))
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rw := httptest.NewRecorder()
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next := http.HandlerFunc(func(http.ResponseWriter, *http.Request) {
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span := test.tracing.tracer.(*MockTracer).Span
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tags := span.Tags
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assert.Equal(t, test.expected.Tags, tags)
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assert.True(t, len(test.expected.OperationName) <= test.spanNameLimit,
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"the len of the operation name %q [len: %d] doesn't respect limit %d",
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test.expected.OperationName, len(test.expected.OperationName), test.spanNameLimit)
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assert.Equal(t, test.expected.OperationName, span.OpName)
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})
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handler := NewForwarder(context.Background(), test.router, test.service, next)
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handler.ServeHTTP(rw, req)
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})
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}
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}
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