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test(metrics): add middleware test

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This commit is contained in:
TheFox0x7 2025-01-23 23:59:44 +01:00
parent 0b1e3254dd
commit 056a308b2a
3 changed files with 17 additions and 8 deletions
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1
go.mod
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@ -242,6 +242,7 @@ require (
github.com/klauspost/pgzip v1.2.6 // indirect
github.com/kr/pretty v0.3.1 // indirect
github.com/kr/text v0.2.0 // indirect
github.com/kylelemons/godebug v1.1.0 // indirect
github.com/libdns/libdns v0.2.2 // indirect
github.com/magiconair/properties v1.8.7 // indirect
github.com/mailru/easyjson v0.7.7 // indirect

2
routers/common/middleware.go
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@ -165,7 +165,7 @@ func RouteMetrics() func(h http.Handler) http.Handler {
route := chi.RouteContext(req.Context()).RoutePattern()
code := strconv.Itoa(m.WrittenStatus())
reqDurationHistogram.WithLabelValues(req.Method, code, route).Observe(time.Since(start).Seconds())
respSizeHistogram.WithLabelValues(req.Method, code, route).Observe(float64(m.Size()))
respSizeHistogram.WithLabelValues(req.Method, code, route).Observe(float64(m.WrittenSize()))
size := req.ContentLength
if size < 0 {
size = 0

22
routers/common/middleware_test.go
View File

@ -1,4 +1,4 @@
package common_test
package common
import (
"net/http"
@ -6,25 +6,33 @@ import (
"testing"
"time"
"code.gitea.io/gitea/routers/common"
"github.com/go-chi/chi/v5"
"github.com/prometheus/client_golang/prometheus/testutil"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestMetricsMiddlewere(t *testing.T) {
middleware := common.RouteMetrics()
middleware := RouteMetrics()
r := chi.NewRouter()
r.Use(middleware)
r.Get("/", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.Write([]byte("test"))
time.Sleep(5 * time.Millisecond)
}))
testServer := httptest.NewServer(r)
// Check all defined metrics
verify := func(i int) {
assert.Equal(t, testutil.CollectAndCount(reqDurationHistogram, "http_server_request_duration"), i)
assert.Equal(t, testutil.CollectAndCount(reqSizeHistogram, "http_server_request_body_size"), i)
assert.Equal(t, testutil.CollectAndCount(respSizeHistogram, "http_server_response_body_size"), i)
assert.Equal(t, testutil.CollectAndCount(reqInflightGauge, "http_server_active_requests"), i)
}
// Check they don't exist before making a request
verify(0)
_, err := http.Get(testServer.URL)
require.NoError(t, err)
// Check they do exist after making the request
verify(1)
}