mirror of
https://github.com/prometheus/prometheus.git
synced 2024-12-29 07:29:42 -08:00
104 lines
2.3 KiB
Go
104 lines
2.3 KiB
Go
// Copyright 2019 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 refresh
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import (
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"context"
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"fmt"
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"testing"
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"time"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/common/model"
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"github.com/stretchr/testify/require"
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"go.uber.org/goleak"
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"github.com/prometheus/prometheus/discovery"
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"github.com/prometheus/prometheus/discovery/targetgroup"
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)
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func TestMain(m *testing.M) {
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goleak.VerifyTestMain(m)
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}
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func TestRefresh(t *testing.T) {
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tg1 := []*targetgroup.Group{
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{
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Source: "tg",
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Targets: []model.LabelSet{
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{
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model.LabelName("t1"): model.LabelValue("v1"),
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},
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{
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model.LabelName("t2"): model.LabelValue("v2"),
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},
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},
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Labels: model.LabelSet{
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model.LabelName("l1"): model.LabelValue("lv1"),
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},
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},
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}
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tg2 := []*targetgroup.Group{
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{
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Source: "tg",
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},
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}
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var i int
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refresh := func(ctx context.Context) ([]*targetgroup.Group, error) {
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i++
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switch i {
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case 1:
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return tg1, nil
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case 2:
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return tg2, nil
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}
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return nil, fmt.Errorf("some error")
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}
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interval := time.Millisecond
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metrics := discovery.NewRefreshMetrics(prometheus.NewRegistry())
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require.NoError(t, metrics.Register())
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defer metrics.Unregister()
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d := NewDiscovery(
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Options{
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Logger: nil,
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Mech: "test",
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Interval: interval,
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RefreshF: refresh,
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MetricsInstantiator: metrics,
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},
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)
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ch := make(chan []*targetgroup.Group)
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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go d.Run(ctx, ch)
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tg := <-ch
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require.Equal(t, tg1, tg)
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tg = <-ch
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require.Equal(t, tg2, tg)
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tick := time.NewTicker(2 * interval)
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defer tick.Stop()
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select {
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case <-ch:
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require.FailNow(t, "Unexpected target group")
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case <-tick.C:
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}
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}
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