mirror of https://github.com/prometheus/prometheus
59 lines
1.5 KiB
Go
59 lines
1.5 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 logging
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import (
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"bytes"
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"log/slog"
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"strings"
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"testing"
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"time"
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"github.com/prometheus/common/promslog"
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"github.com/stretchr/testify/require"
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)
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func TestDedupe(t *testing.T) {
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var buf bytes.Buffer
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d := Dedupe(promslog.New(&promslog.Config{Writer: &buf}), 100*time.Millisecond)
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dlog := slog.New(d)
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defer d.Stop()
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// Log 10 times quickly, ensure they are deduped.
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for i := 0; i < 10; i++ {
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dlog.Info("test", "hello", "world")
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}
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// Trim empty lines
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lines := []string{}
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for _, line := range strings.Split(buf.String(), "\n") {
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if line != "" {
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lines = append(lines, line)
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}
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}
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require.Len(t, lines, 1)
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// Wait, then log again, make sure it is logged.
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time.Sleep(200 * time.Millisecond)
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dlog.Info("test", "hello", "world")
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// Trim empty lines
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lines = []string{}
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for _, line := range strings.Split(buf.String(), "\n") {
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if line != "" {
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lines = append(lines, line)
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}
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}
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require.Len(t, lines, 2)
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}
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