traefik/middlewares/tracing/forwarder_test.go

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package tracing
import (
"testing"
"github.com/stretchr/testify/assert"
)
func TestTracingNewForwarderMiddleware(t *testing.T) {
testCases := []struct {
desc string
tracer *Tracing
frontend string
backend string
expected *forwarderMiddleware
}{
{
desc: "Simple Forward Tracer without truncation and hashing",
tracer: &Tracing{
SpanNameLimit: 101,
},
frontend: "some-service.domain.tld",
backend: "some-service.domain.tld",
expected: &forwarderMiddleware{
Tracing: &Tracing{
SpanNameLimit: 101,
},
frontend: "some-service.domain.tld",
backend: "some-service.domain.tld",
opName: "forward some-service.domain.tld/some-service.domain.tld",
},
}, {
desc: "Simple Forward Tracer with truncation and hashing",
tracer: &Tracing{
SpanNameLimit: 101,
},
frontend: "some-service-100.slug.namespace.environment.domain.tld",
backend: "some-service-100.slug.namespace.environment.domain.tld",
expected: &forwarderMiddleware{
Tracing: &Tracing{
SpanNameLimit: 101,
},
frontend: "some-service-100.slug.namespace.environment.domain.tld",
backend: "some-service-100.slug.namespace.environment.domain.tld",
opName: "forward some-service-100.slug.namespace.enviro.../some-service-100.slug.namespace.enviro.../bc4a0d48",
},
},
{
desc: "Exactly 101 chars",
tracer: &Tracing{
SpanNameLimit: 101,
},
frontend: "some-service1.namespace.environment.domain.tld",
backend: "some-service1.namespace.environment.domain.tld",
expected: &forwarderMiddleware{
Tracing: &Tracing{
SpanNameLimit: 101,
},
frontend: "some-service1.namespace.environment.domain.tld",
backend: "some-service1.namespace.environment.domain.tld",
opName: "forward some-service1.namespace.environment.domain.tld/some-service1.namespace.environment.domain.tld",
},
},
{
desc: "More than 101 chars",
tracer: &Tracing{
SpanNameLimit: 101,
},
frontend: "some-service1.frontend.namespace.environment.domain.tld",
backend: "some-service1.backend.namespace.environment.domain.tld",
expected: &forwarderMiddleware{
Tracing: &Tracing{
SpanNameLimit: 101,
},
frontend: "some-service1.frontend.namespace.environment.domain.tld",
backend: "some-service1.backend.namespace.environment.domain.tld",
opName: "forward some-service1.frontend.namespace.envir.../some-service1.backend.namespace.enviro.../fa49dd23",
},
},
}
for _, test := range testCases {
test := test
t.Run(test.desc, func(t *testing.T) {
t.Parallel()
actual := test.tracer.NewForwarderMiddleware(test.frontend, test.backend)
assert.Equal(t, test.expected, actual)
assert.True(t, len(test.expected.opName) <= test.tracer.SpanNameLimit)
})
}
}