package inventory

import (
	"encoding/json"
	"testing"
)

// **An assignment's key is `<node>.<module>`, as the bucket has always had it** (ADR 0408 §3): its readers parse nothing
// but it.
func TestAnAssignmentsKeyIsTheNodeAndTheModule(t *testing.T) {
	if got := assignmentKey("anchor", "notes"); got != "anchor.notes" {
		t.Fatalf("the key is %q", got)
	}
	if got := assignmentKey("g14.example", "dunst"); got != "g14.example.dunst" {
		t.Fatalf("the key of a machine whose name holds a dot is %q", got)
	}
}

// **A plan that is absent and a null one are one** (the provisioner's plan in an assignment's value): the pass that keeps
// the plans writes only where they differ.
func TestAnAbsentPlanAndANullOneAreTheSame(t *testing.T) {
	for name, tc := range map[string]struct {
		a, b json.RawMessage
		same bool
	}{
		"both absent":     {nil, nil, true},
		"null and absent": {json.RawMessage(`null`), nil, true},
		"the same plan":   {json.RawMessage(`{"files":[]}`), json.RawMessage(` {"files":[]} `), true},
		"another plan":    {json.RawMessage(`{"files":[]}`), json.RawMessage(`{"files":[1]}`), false},
		"a plan and none": {json.RawMessage(`{"files":[]}`), nil, false},
		"none and a plan": {nil, json.RawMessage(`{"files":[]}`), false},
	} {
		if got := sameJSON(tc.a, tc.b); got != tc.same {
			t.Errorf("%s: %v", name, got)
		}
	}
}