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package docker
import (
"testing"
"github.com/docker/docker/api/types/container"
)
// TestComputeStats — verifikasi rumus tanpa daemon, angka dibuat persis.
func TestComputeStats(t *testing.T) {
raw := &container.StatsResponse{
CPUStats: container.CPUStats{
CPUUsage: container.CPUUsage{TotalUsage: 300_000_000},
SystemUsage: 1_000_000_000,
OnlineCPUs: 4,
},
PreCPUStats: container.CPUStats{
CPUUsage: container.CPUUsage{TotalUsage: 100_000_000},
SystemUsage: 500_000_000,
},
MemoryStats: container.MemoryStats{
Usage: 200 * 1024 * 1024,
Limit: 500 * 1024 * 1024,
Stats: map[string]uint64{"cache": 50 * 1024 * 1024},
},
Networks: map[string]container.NetworkStats{
"eth0": {RxBytes: 1000, TxBytes: 2000},
"eth1": {RxBytes: 500, TxBytes: 300},
},
BlkioStats: container.BlkioStats{
IoServiceBytesRecursive: []container.BlkioStatEntry{
{Op: "Read", Value: 4096},
{Op: "Write", Value: 8192},
{Op: "Sync", Value: 999},
},
},
PidsStats: container.PidsStats{Current: 17},
}
s := computeStats(raw)
// CPU: (300−100)/(1000−500) × 4 × 100 = 160%
if s.CPUPercent < 159.9 || s.CPUPercent > 160.1 {
t.Fatalf("CPU%% = %v, mau ~160", s.CPUPercent)
}
// Mem: (200−50) MB dari limit 500 MB = 30%
if s.MemUsed != 150*1024*1024 || s.MemPercent < 29.9 || s.MemPercent > 30.1 {
t.Fatalf("mem salah: used=%d pct=%v", s.MemUsed, s.MemPercent)
}
if s.NetRx != 1500 || s.NetTx != 2300 {
t.Fatalf("net salah: rx=%d tx=%d", s.NetRx, s.NetTx)
}
if s.BlkRead != 4096 || s.BlkWrite != 8192 {
t.Fatalf("blk salah: r=%d w=%d", s.BlkRead, s.BlkWrite)
}
if s.PIDs != 17 {
t.Fatalf("pids=%d", s.PIDs)
}
}
// TestComputeStatsZeroGuard — delta nol / data kosong tidak boleh NaN/panic.
func TestComputeStatsZeroGuard(t *testing.T) {
s := computeStats(&container.StatsResponse{})
if s.CPUPercent != 0 || s.MemPercent != 0 || s.MemUsed != 0 {
t.Fatalf("guard gagal: %+v", s)
}
}