randomly generate stats for test

info/test/datagen.go

@@ -0,0 +1,50 @@
+// Copyright 2014 Google Inc. All Rights Reserved.
+//
+// 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 test
+
+import (
+	"math/rand"
+	"time"
+
+	"github.com/google/cadvisor/info"
+)
+
+func GenerateRandomStats(numStats, numCores int, duration time.Duration) []*info.ContainerStats {
+	ret := make([]*info.ContainerStats, numStats)
+	perCoreUsages := make([]uint64, numCores)
+	currentTime := time.Now()
+	for i := range perCoreUsages {
+		perCoreUsages[i] = uint64(rand.Int63n(1000))
+	}
+	for i := 0; i < numStats; i++ {
+		stats := new(info.ContainerStats)
+		stats.Cpu = new(info.CpuStats)
+		stats.Memory = new(info.MemoryStats)
+		stats.Timestamp = currentTime
+		currentTime = currentTime.Add(duration)
+
+		percore := make([]uint64, numCores)
+		for i := range perCoreUsages {
+			perCoreUsages[i] += uint64(rand.Int63n(1000))
+			percore[i] = perCoreUsages[i]
+			stats.Cpu.Usage.Total += percore[i]
+		}
+		stats.Cpu.Usage.PerCpu = percore
+		stats.Cpu.Usage.User = stats.Cpu.Usage.Total
+		stats.Cpu.Usage.System = 0
+		stats.Memory.Usage = uint64(rand.Int63n(4096))
+	}
+	return ret
+}