56 lines
1.6 KiB
Go
56 lines
1.6 KiB
Go
package middlewares
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import (
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"net/http"
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"net/http/httptest"
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"reflect"
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"testing"
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"github.com/go-kit/kit/metrics"
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)
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func TestMetricsRetryListener(t *testing.T) {
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req := httptest.NewRequest(http.MethodGet, "/", nil)
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retryMetrics := newCollectingRetryMetrics()
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retryListener := NewMetricsRetryListener(retryMetrics, "backendName")
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retryListener.Retried(req, 1)
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retryListener.Retried(req, 2)
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wantCounterValue := float64(2)
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if retryMetrics.retryCounter.counterValue != wantCounterValue {
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t.Errorf("got counter value of %d, want %d", retryMetrics.retryCounter.counterValue, wantCounterValue)
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}
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wantLabelValues := []string{"backend", "backendName"}
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if !reflect.DeepEqual(retryMetrics.retryCounter.lastLabelValues, wantLabelValues) {
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t.Errorf("wrong label values %v used, want %v", retryMetrics.retryCounter.lastLabelValues, wantLabelValues)
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}
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}
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// collectingRetryMetrics is an implementation of the retryMetrics interface that can be used inside tests to collect the times Add() was called.
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type collectingRetryMetrics struct {
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retryCounter *collectingCounter
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}
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func newCollectingRetryMetrics() collectingRetryMetrics {
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return collectingRetryMetrics{retryCounter: &collectingCounter{}}
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}
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func (metrics collectingRetryMetrics) RetriesCounter() metrics.Counter {
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return metrics.retryCounter
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}
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type collectingCounter struct {
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counterValue float64
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lastLabelValues []string
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}
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func (c *collectingCounter) With(labelValues ...string) metrics.Counter {
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c.lastLabelValues = labelValues
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return c
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}
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func (c *collectingCounter) Add(delta float64) {
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c.counterValue += delta
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}
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