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package manager
import (
"testing"
"github.com/opencontainers/cgroups"
"github.com/opencontainers/cgroups/systemd"
)
// TestNilResources checks that a cgroup manager do not panic when
// config.Resources is nil. While it does not make sense to use a
// manager with no resources, it should not result in a panic.
//
// This tests either v1 or v2 fs cgroup manager, depending on which
// cgroup version is available.
func TestNilResources(t *testing.T) {
testNilResources(t, false)
}
// TestNilResourcesSystemd is the same as TestNilResources,
// only checking the systemd cgroup manager.
func TestNilResourcesSystemd(t *testing.T) {
if !systemd.IsRunningSystemd() {
t.Skip("requires systemd")
}
testNilResources(t, true)
}
func testNilResources(t *testing.T, systemd bool) {
cg := &cgroups.Cgroup{} // .Resources is nil
cg.Systemd = systemd
mgr, err := New(cg)
if err != nil {
// Some managers require non-nil Resources during
// instantiation -- provide and retry. In such case
// we're mostly testing Set(nil) below.
cg.Resources = &cgroups.Resources{}
mgr, err = New(cg)
if err != nil {
t.Fatal(err)
}
}
_ = mgr.Apply(-1)
_ = mgr.Set(nil)
_ = mgr.Freeze(cgroups.Thawed)
_ = mgr.Exists()
_, _ = mgr.GetAllPids()
_, _ = mgr.GetCgroups()
_, _ = mgr.GetFreezerState()
_ = mgr.Path("")
_ = mgr.GetPaths()
_, _ = mgr.GetStats()
_, _ = mgr.OOMKillCount()
_ = mgr.Destroy()
}
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