package declaration

import (
	"strings"
	"testing"
)

// Defends novox/hq ADR 0117: a service may leave its unit's lifecycle to the machine, and then
// says nothing but its triggers.
func TestAServiceWithoutAStateSaysOnlyItsTriggers(t *testing.T) {
	for name, c := range map[string]struct{ resource, refusal string }{
		"no trigger":       {`{"id":"s","type":"service","unit":"NetworkManager.service"}`, "declares nothing"},
		"with boot":        {`{"id":"s","type":"service","unit":"NetworkManager.service","boot":"enabled","reload-on":["f"]}`, "boot and takes-over"},
		"with takes-over":  {`{"id":"s","type":"service","unit":"a.service","reload-on":["f"],"takes-over":{"interface":"wg0","unit":"b.service","config":"/etc/x"}}`, "boot and takes-over"},
		"an unknown state": {`{"id":"s","type":"service","unit":"a.service","state":"paused"}`, "omits state to leave the unit's lifecycle to the machine"},
	} {
		_, err := Parse([]byte(`{"declaration":1,"resources":[{"id":"f","type":"file","path":"/etc/x","content":"x"},` + c.resource + `]}`))
		if err == nil || !strings.Contains(err.Error(), c.refusal) {
			t.Errorf("%s: want a refusal naming %q, got %v", name, c.refusal, err)
		}
	}
	d, err := Parse([]byte(`{"declaration":1,"resources":[{"id":"f","type":"file","path":"/etc/x","content":"x"},
	  {"id":"s","type":"service","unit":"NetworkManager.service","restart-on":["f"]}]}`))
	if err != nil {
		t.Fatal(err)
	}
	if s := d.Resources[1].(*Service); !s.Stateless() {
		t.Error("a service without a state was not read as stateless")
	}
}