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http_prometheus_test.go
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http_prometheus_test.go
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/*
* Copyright (c) 2020 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package vanity_test
import (
"testing"
"github.com/prometheus/client_golang/prometheus"
dto "github.com/prometheus/client_model/go"
"github.com/stretchr/testify/assert"
"l7e.io/vanity"
)
var snapshots = make(map[string]float64)
func prometheusReset() {
prometheusSnapshot(vanity.APICalls)
prometheusSnapshot(vanity.APIErrors)
prometheusSnapshot(vanity.APINotFound)
prometheusSnapshot(vanity.APIDocRedirects)
prometheusSnapshot(vanity.APIErrTemplates)
}
func prometheusSnapshot(c prometheus.Counter) {
m := &dto.Metric{}
_ = c.Write(m)
snapshots[c.Desc().String()] = m.Counter.GetValue()
}
func prometheusCheck(t *testing.T, calls, errors, notFound, docRedirects, errTemplates int) {
prometheusCheckMetric(t, vanity.APICalls, calls)
prometheusCheckMetric(t, vanity.APIErrors, errors)
prometheusCheckMetric(t, vanity.APINotFound, notFound)
prometheusCheckMetric(t, vanity.APIDocRedirects, docRedirects)
prometheusCheckMetric(t, vanity.APIErrTemplates, errTemplates)
}
func prometheusCheckMetric(t *testing.T, c prometheus.Counter, v int) {
m := &dto.Metric{}
err := c.Write(m)
assert.NoError(t, err)
start := snapshots[c.Desc().String()]
assert.Equal(t, float64(v), m.Counter.GetValue()-start, c.Desc().String())
}