telegraf/plugins/inputs/prometheus/prometheus_test.go

56 lines
1.4 KiB
Go

package prometheus
import (
"fmt"
"net/http"
"net/http/httptest"
"testing"
"github.com/influxdata/telegraf/testutil"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
const sampleTextFormat = `# HELP go_gc_duration_seconds A summary of the GC invocation durations.
# TYPE go_gc_duration_seconds summary
go_gc_duration_seconds{quantile="0"} 0.00010425500000000001
go_gc_duration_seconds{quantile="0.25"} 0.000139108
go_gc_duration_seconds{quantile="0.5"} 0.00015749400000000002
go_gc_duration_seconds{quantile="0.75"} 0.000331463
go_gc_duration_seconds{quantile="1"} 0.000667154
go_gc_duration_seconds_sum 0.0018183950000000002
go_gc_duration_seconds_count 7
# HELP go_goroutines Number of goroutines that currently exist.
# TYPE go_goroutines gauge
go_goroutines 15
`
func TestPrometheusGeneratesMetrics(t *testing.T) {
ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
fmt.Fprintln(w, sampleTextFormat)
}))
defer ts.Close()
p := &Prometheus{
Urls: []string{ts.URL},
}
var acc testutil.Accumulator
err := p.Gather(&acc)
require.NoError(t, err)
expected := []struct {
name string
value float64
tags map[string]string
}{
{"prometheus_go_gc_duration_seconds_count", 7, map[string]string{}},
{"prometheus_go_goroutines", 15, map[string]string{}},
}
for _, e := range expected {
assert.True(t, acc.HasFloatField(e.name, "value"))
}
}