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go-zero/core/metric/histogram_test.go

54 lines
1.3 KiB
Go

package metric
import (
"strings"
"testing"
"github.com/prometheus/client_golang/prometheus/testutil"
"github.com/stretchr/testify/assert"
"github.com/zeromicro/go-zero/core/proc"
)
func TestNewHistogramVec(t *testing.T) {
histogramVec := NewHistogramVec(&HistogramVecOpts{
Name: "duration_ms",
Help: "rpc server requests duration(ms).",
Buckets: []float64{1, 2, 3},
})
defer histogramVec.close()
histogramVecNil := NewHistogramVec(nil)
assert.NotNil(t, histogramVec)
assert.Nil(t, histogramVecNil)
}
func TestHistogramObserve(t *testing.T) {
startAgent()
histogramVec := NewHistogramVec(&HistogramVecOpts{
Name: "counts",
Help: "rpc server requests duration(ms).",
Buckets: []float64{1, 2, 3},
Labels: []string{"method"},
})
defer histogramVec.close()
hv, _ := histogramVec.(*promHistogramVec)
hv.Observe(2, "/Users")
metadata := `
# HELP counts rpc server requests duration(ms).
# TYPE counts histogram
`
val := `
counts_bucket{method="/Users",le="1"} 0
counts_bucket{method="/Users",le="2"} 1
counts_bucket{method="/Users",le="3"} 1
counts_bucket{method="/Users",le="+Inf"} 1
counts_sum{method="/Users"} 2
counts_count{method="/Users"} 1
`
err := testutil.CollectAndCompare(hv.histogram, strings.NewReader(metadata+val))
assert.Nil(t, err)
proc.Shutdown()
}