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disk_test.go
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/
disk_test.go
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package proc
import (
"syscall"
"testing"
)
func TestMounts(t *testing.T) {
mounts, err := Mounts()
if err != nil {
t.Fatal(err)
}
// Check that there's a / entry.
found := false
for _, entry := range mounts {
if entry.File == "/" && entry.Vfstype != "rootfs" {
found = true
break
}
}
if !found {
t.Error("Could not locate / in mounts")
}
}
func TestDiskStats(t *testing.T) {
var statt syscall.Stat_t
if err := syscall.Stat("/", &statt); err != nil {
t.Fatal(err)
}
major, minor := decomposeDevNumber(statt.Dev)
stats, err := DiskStats()
if err != nil {
t.Fatal(err)
}
found := false
for _, stat := range stats {
if stat.Major == major && stat.Minor == minor {
found = true
if stat.ReadsCompleted == 0 {
t.Errorf("Expected non-zero completed reads for root partition disk.")
}
}
}
if !found {
t.Errorf("Partition (%d, %d) (mounted at /) was not in /proc/diskstats", major, minor)
}
}
func decomposeDevNumber(n uint64) (major, minor int) {
minor = int(n & 0xff)
major = int((n & 0xff00) >> 8)
return major, minor
}