mirror of https://github.com/prometheus/prometheus
156 lines
3.5 KiB
Go
156 lines
3.5 KiB
Go
// Copyright 2020 The Prometheus 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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package remote
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import (
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"context"
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"errors"
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"testing"
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"time"
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"github.com/prometheus/common/model"
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"github.com/stretchr/testify/require"
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"github.com/prometheus/prometheus/scrape"
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)
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var (
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interval = model.Duration(1 * time.Millisecond)
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deadline = 1 * time.Millisecond
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)
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// TestMetaStore satisfies the MetricMetadataStore interface.
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// It is used to inject specific metadata as part of a test case.
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type TestMetaStore struct {
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Metadata []scrape.MetricMetadata
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}
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func (s *TestMetaStore) ListMetadata() []scrape.MetricMetadata {
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return s.Metadata
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}
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func (s *TestMetaStore) GetMetadata(metric string) (scrape.MetricMetadata, bool) {
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for _, m := range s.Metadata {
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if metric == m.Metric {
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return m, true
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}
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}
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return scrape.MetricMetadata{}, false
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}
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func (s *TestMetaStore) SizeMetadata() int { return 0 }
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func (s *TestMetaStore) LengthMetadata() int { return 0 }
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type writeMetadataToMock struct {
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metadataAppended int
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}
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func (mwtm *writeMetadataToMock) AppendWatcherMetadata(_ context.Context, m []scrape.MetricMetadata) {
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mwtm.metadataAppended += len(m)
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}
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func newMetadataWriteToMock() *writeMetadataToMock {
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return &writeMetadataToMock{}
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}
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type scrapeManagerMock struct {
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manager *scrape.Manager
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ready bool
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}
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func (smm *scrapeManagerMock) Get() (*scrape.Manager, error) {
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if smm.ready {
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return smm.manager, nil
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}
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return nil, errors.New("not ready")
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}
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type fakeManager struct {
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activeTargets map[string][]*scrape.Target
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}
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func (fm *fakeManager) TargetsActive() map[string][]*scrape.Target {
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return fm.activeTargets
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}
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func TestWatchScrapeManager_NotReady(t *testing.T) {
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wt := newMetadataWriteToMock()
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smm := &scrapeManagerMock{
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ready: false,
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}
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mw := NewMetadataWatcher(nil, smm, "", wt, interval, deadline)
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require.False(t, mw.ready())
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mw.collect()
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require.Equal(t, 0, wt.metadataAppended)
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}
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func TestWatchScrapeManager_ReadyForCollection(t *testing.T) {
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wt := newMetadataWriteToMock()
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metadata := &TestMetaStore{
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Metadata: []scrape.MetricMetadata{
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{
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Metric: "prometheus_tsdb_head_chunks_created_total",
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Type: model.MetricTypeCounter,
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Help: "Total number",
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Unit: "",
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},
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{
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Metric: "prometheus_remote_storage_retried_samples_total",
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Type: model.MetricTypeCounter,
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Help: "Total number",
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Unit: "",
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},
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},
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}
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metadataDup := &TestMetaStore{
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Metadata: []scrape.MetricMetadata{
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{
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Metric: "prometheus_tsdb_head_chunks_created_total",
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Type: model.MetricTypeCounter,
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Help: "Total number",
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Unit: "",
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},
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},
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}
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target := &scrape.Target{}
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target.SetMetadataStore(metadata)
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targetWithDup := &scrape.Target{}
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targetWithDup.SetMetadataStore(metadataDup)
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manager := &fakeManager{
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activeTargets: map[string][]*scrape.Target{
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"job": {target},
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"dup": {targetWithDup},
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},
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}
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smm := &scrapeManagerMock{
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ready: true,
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}
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mw := NewMetadataWatcher(nil, smm, "", wt, interval, deadline)
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mw.manager = manager
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mw.collect()
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require.Equal(t, 2, wt.metadataAppended)
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}
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