99 lines
2.5 KiB
Go
99 lines
2.5 KiB
Go
// Copyright 2014 Google Inc. All Rights Reserved.
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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 container
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import (
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crand "crypto/rand"
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"encoding/binary"
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"math/rand"
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"testing"
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"github.com/google/cadvisor/info"
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)
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func init() {
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// NOTE(dengnan): Even if we picked a good random seed,
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// the random number from math/rand is still not cryptographically secure!
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var seed int64
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binary.Read(crand.Reader, binary.LittleEndian, &seed)
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rand.Seed(seed)
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}
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type randomStatsContainer struct {
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NoStatsSummary
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}
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func (self *randomStatsContainer) GetSpec() (*info.ContainerSpec, error) {
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return nil, nil
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}
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func (self *randomStatsContainer) GetStats() (*info.ContainerStats, error) {
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stats := new(info.ContainerStats)
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stats.Cpu = new(info.CpuStats)
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stats.Memory = new(info.MemoryStats)
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stats.Memory.Usage = uint64(rand.Intn(2048))
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return stats, nil
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}
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func (self *randomStatsContainer) ListContainers(listType ListType) ([]string, error) {
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return nil, nil
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}
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func (self *randomStatsContainer) ListThreads(listType ListType) ([]int, error) {
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return nil, nil
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}
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func (self *randomStatsContainer) ListProcesses(listType ListType) ([]int, error) {
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return nil, nil
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}
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func TestAvgMaxMemoryUsage(t *testing.T) {
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handler, err := AddStatsSummary(
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&randomStatsContainer{},
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&StatsParameter{
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Sampler: "uniform",
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NumSamples: 10,
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},
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)
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if err != nil {
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t.Error(err)
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}
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var maxUsage uint64
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var totalUsage uint64
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N := 100
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for i := 0; i < N; i++ {
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stats, err := handler.GetStats()
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if err != nil {
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t.Errorf("Error when get stats: %v", err)
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continue
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}
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if stats.Memory.Usage > maxUsage {
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maxUsage = stats.Memory.Usage
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}
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totalUsage += stats.Memory.Usage
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}
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summary, err := handler.StatsSummary()
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if err != nil {
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t.Fatalf("Error when get summary: %v", err)
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}
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if summary.MaxMemoryUsage != maxUsage {
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t.Fatalf("Max memory usage should be %v; received %v", maxUsage, summary.MaxMemoryUsage)
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}
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avg := totalUsage / uint64(N)
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if summary.AvgMemoryUsage != avg {
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t.Fatalf("Avg memory usage should be %v; received %v", avg, summary.AvgMemoryUsage)
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}
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}
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