prometheus/util/logging/dedupe_test.go

48 lines
1.2 KiB
Go
Raw Normal View History

// 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 logging
import (
"testing"
"time"
"github.com/stretchr/testify/require"
)
type counter int
func (c *counter) Log(keyvals ...interface{}) error {
(*c)++
return nil
}
func TestDedupe(t *testing.T) {
var c counter
d := Dedupe(&c, 100*time.Millisecond)
defer d.Stop()
// Log 10 times quickly, ensure they are deduped.
for i := 0; i < 10; i++ {
err := d.Log("msg", "hello")
require.NoError(t, err)
}
require.Equal(t, 1, int(c))
// Wait, then log again, make sure it is logged.
time.Sleep(200 * time.Millisecond)
err := d.Log("msg", "hello")
require.NoError(t, err)
require.Equal(t, 2, int(c))
}