package tentacle

import (
	"os"
	"path/filepath"
	"strings"
	"testing"
)

func TestDelegatedReaderParent(t *testing.T) {
	for _, value := range []string{"", "relative", "/sys/fs/cgroup/../outside", "/sys/fs/cgroup/extensions"} {
		t.Setenv("CTHULHU_TENTACLE_CGROUP_PARENT", value)
		parent, err := DelegatedParent()
		if value == "/sys/fs/cgroup/extensions" {
			if err != nil || parent != value {
				t.Fatalf("%q: %s %v", value, parent, err)
			}
		} else if err == nil {
			t.Fatalf("accepted %q", value)
		}
	}
}

func TestLocalLaunchListValidation(t *testing.T) {
	path := filepath.Join(t.TempDir(), "tentacles.json")
	for _, data := range []string{
		`[{"ID":"echo","Program":["/bin/true"]}]`,
		`[{"ID":"echo","Program":["relative"]}]`,
		`[{"ID":"echo","Program":["/bin/true"]},{"ID":"echo","Program":["/bin/true"]}]`,
		strings.Repeat(" ", MaxFrameBytes+1),
		`[{"ID":"echo","ID":"other","Program":["/bin/true"]}]`,
	} {
		if err := os.WriteFile(path, []byte(data), 0600); err != nil {
			t.Fatal(err)
		}
		specs, err := LoadLocalSpecs(path)
		valid := data == `[{"ID":"echo","Program":["/bin/true"]}]`
		if (err == nil) != valid {
			t.Fatalf("validation: %v", err)
		}
		if valid && len(specs) != 1 {
			t.Fatal(specs)
		}
	}
}