mirror of
https://github.com/ceph/ceph-csi.git
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94 lines
3.3 KiB
Go
94 lines
3.3 KiB
Go
/*
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Copyright 2019 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package testutil
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import (
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"fmt"
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"io"
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"github.com/prometheus/client_golang/prometheus/testutil"
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apimachineryversion "k8s.io/apimachinery/pkg/version"
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"k8s.io/component-base/metrics"
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)
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// CollectAndCompare registers the provided Collector with a newly created
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// pedantic Registry. It then does the same as GatherAndCompare, gathering the
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// metrics from the pedantic Registry.
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func CollectAndCompare(c metrics.Collector, expected io.Reader, metricNames ...string) error {
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lintProblems, err := testutil.CollectAndLint(c, metricNames...)
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if err != nil {
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return err
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}
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if err := getLintError(lintProblems); err != nil {
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return err
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}
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return testutil.CollectAndCompare(c, expected, metricNames...)
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}
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// GatherAndCompare gathers all metrics from the provided Gatherer and compares
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// it to an expected output read from the provided Reader in the Prometheus text
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// exposition format. If any metricNames are provided, only metrics with those
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// names are compared.
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func GatherAndCompare(g metrics.Gatherer, expected io.Reader, metricNames ...string) error {
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lintProblems, err := testutil.GatherAndLint(g, metricNames...)
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if err != nil {
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return err
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}
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if err := getLintError(lintProblems); err != nil {
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return err
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}
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return testutil.GatherAndCompare(g, expected, metricNames...)
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}
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// CustomCollectAndCompare registers the provided StableCollector with a newly created
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// registry. It then does the same as GatherAndCompare, gathering the
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// metrics from the pedantic Registry.
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func CustomCollectAndCompare(c metrics.StableCollector, expected io.Reader, metricNames ...string) error {
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registry := metrics.NewKubeRegistry()
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registry.CustomMustRegister(c)
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return GatherAndCompare(registry, expected, metricNames...)
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}
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// ScrapeAndCompare calls a remote exporter's endpoint which is expected to return some metrics in
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// plain text format. Then it compares it with the results that the `expected` would return.
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// If the `metricNames` is not empty it would filter the comparison only to the given metric names.
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func ScrapeAndCompare(url string, expected io.Reader, metricNames ...string) error {
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return testutil.ScrapeAndCompare(url, expected, metricNames...)
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}
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// NewFakeKubeRegistry creates a fake `KubeRegistry` that takes the input version as `build in version`.
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// It should only be used in testing scenario especially for the deprecated metrics.
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// The input version format should be `major.minor.patch`, e.g. '1.18.0'.
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func NewFakeKubeRegistry(ver string) metrics.KubeRegistry {
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backup := metrics.BuildVersion
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defer func() {
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metrics.BuildVersion = backup
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}()
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metrics.BuildVersion = func() apimachineryversion.Info {
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return apimachineryversion.Info{
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GitVersion: fmt.Sprintf("v%s-alpha+1.12345", ver),
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}
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}
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return metrics.NewKubeRegistry()
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}
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