mirror of
https://github.com/prometheus/prometheus.git
synced 2024-12-26 06:04:05 -08:00
104 lines
2.3 KiB
Go
104 lines
2.3 KiB
Go
// Copyright 2019 The Prometheus 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 refresh
|
|
|
|
import (
|
|
"context"
|
|
"errors"
|
|
"testing"
|
|
"time"
|
|
|
|
"github.com/prometheus/client_golang/prometheus"
|
|
"github.com/prometheus/common/model"
|
|
"github.com/stretchr/testify/require"
|
|
"go.uber.org/goleak"
|
|
|
|
"github.com/prometheus/prometheus/discovery"
|
|
"github.com/prometheus/prometheus/discovery/targetgroup"
|
|
)
|
|
|
|
func TestMain(m *testing.M) {
|
|
goleak.VerifyTestMain(m)
|
|
}
|
|
|
|
func TestRefresh(t *testing.T) {
|
|
tg1 := []*targetgroup.Group{
|
|
{
|
|
Source: "tg",
|
|
Targets: []model.LabelSet{
|
|
{
|
|
model.LabelName("t1"): model.LabelValue("v1"),
|
|
},
|
|
{
|
|
model.LabelName("t2"): model.LabelValue("v2"),
|
|
},
|
|
},
|
|
Labels: model.LabelSet{
|
|
model.LabelName("l1"): model.LabelValue("lv1"),
|
|
},
|
|
},
|
|
}
|
|
tg2 := []*targetgroup.Group{
|
|
{
|
|
Source: "tg",
|
|
},
|
|
}
|
|
|
|
var i int
|
|
refresh := func(ctx context.Context) ([]*targetgroup.Group, error) {
|
|
i++
|
|
switch i {
|
|
case 1:
|
|
return tg1, nil
|
|
case 2:
|
|
return tg2, nil
|
|
}
|
|
return nil, errors.New("some error")
|
|
}
|
|
interval := time.Millisecond
|
|
|
|
metrics := discovery.NewRefreshMetrics(prometheus.NewRegistry())
|
|
require.NoError(t, metrics.Register())
|
|
defer metrics.Unregister()
|
|
|
|
d := NewDiscovery(
|
|
Options{
|
|
Logger: nil,
|
|
Mech: "test",
|
|
Interval: interval,
|
|
RefreshF: refresh,
|
|
MetricsInstantiator: metrics,
|
|
},
|
|
)
|
|
|
|
ch := make(chan []*targetgroup.Group)
|
|
ctx, cancel := context.WithCancel(context.Background())
|
|
defer cancel()
|
|
go d.Run(ctx, ch)
|
|
|
|
tg := <-ch
|
|
require.Equal(t, tg1, tg)
|
|
|
|
tg = <-ch
|
|
require.Equal(t, tg2, tg)
|
|
|
|
tick := time.NewTicker(2 * interval)
|
|
defer tick.Stop()
|
|
select {
|
|
case <-ch:
|
|
require.FailNow(t, "Unexpected target group")
|
|
case <-tick.C:
|
|
}
|
|
}
|