52 lines
1.1 KiB
Go
52 lines
1.1 KiB
Go
// Copyright 2022 PingCAP, Inc.
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//
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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 cpu
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import (
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"runtime"
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"sync"
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"testing"
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"time"
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"github.com/stretchr/testify/require"
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)
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func TestCPUValue(t *testing.T) {
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Observer := NewCPUObserver()
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Observer.Start()
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exit := make(chan struct{})
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var wg sync.WaitGroup
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for i := 0; i < 10; i++ {
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wg.Add(1)
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go func() {
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defer wg.Done()
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for {
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select {
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case <-exit:
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return
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default:
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runtime.Gosched()
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}
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}
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}()
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}
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time.Sleep(30 * time.Second)
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require.Greater(t, Observer.observe(), 0.0)
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require.Less(t, Observer.observe(), 1.0)
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Observer.Stop()
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close(exit)
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wg.Wait()
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}
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