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tailscale/tsweb/promvarz/promvarz_test.go

36 lines
909 B
Go

// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause
package promvarz
import (
"expvar"
"net/http"
"net/http/httptest"
"strings"
"testing"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promauto"
"github.com/prometheus/client_golang/prometheus/testutil"
)
func TestHandler(t *testing.T) {
test1 := expvar.NewInt("gauge_promvarz_test_expvar")
test1.Set(42)
test2 := promauto.NewGauge(prometheus.GaugeOpts{Name: "promvarz_test_native"})
test2.Set(4242)
svr := httptest.NewServer(http.HandlerFunc(Handler))
defer svr.Close()
want := `
# TYPE promvarz_test_expvar gauge
promvarz_test_expvar 42
# TYPE promvarz_test_native gauge
promvarz_test_native 4242
`
if err := testutil.ScrapeAndCompare(svr.URL, strings.NewReader(want), "promvarz_test_expvar", "promvarz_test_native"); err != nil {
t.Error(err)
}
}