mirror of https://github.com/prometheus/prometheus
84 lines
1.8 KiB
Go
84 lines
1.8 KiB
Go
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// 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/common/model"
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"github.com/prometheus/prometheus/discovery/targetgroup"
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"github.com/prometheus/prometheus/util/testutil"
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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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d := NewDiscovery(nil, "test", interval, refresh)
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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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testutil.Equals(t, tg1, tg)
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tg = <-ch
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testutil.Equals(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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t.Fatal("Unexpected target group")
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case <-tick.C:
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}
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}
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