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package world
import (
"bytes"
"log"
"os"
"path/filepath"
"strings"
"testing"
)
// Regression: a room file whose declared id: disagrees with its numeric
// filename was silently loaded under the filename with no diagnostic.
// World.LoadRoom must warn, because room identity comes from the filename.
func writeRoomFile(t *testing.T, dir, name, body string) {
t.Helper()
path := filepath.Join(dir, "rooms", name)
if err := os.MkdirAll(filepath.Dir(path), 0o755); err != nil {
t.Fatal(err)
}
if err := os.WriteFile(path, []byte(body), 0o644); err != nil {
t.Fatal(err)
}
}
func captureRoomLog(t *testing.T, fn func()) string {
t.Helper()
var buf bytes.Buffer
old := log.Writer()
log.SetOutput(&buf)
defer log.SetOutput(old)
fn()
return buf.String()
}
func TestWorldWarnsOnDeclaredRoomIDMismatch(t *testing.T) {
dir := t.TempDir()
writeRoomFile(t, dir, "1.yaml", "id: 2\nname: Wrong Id\n")
w := New(dir)
out := captureRoomLog(t, func() {
room, err := w.LoadRoom(1)
if err != nil {
t.Fatalf("load room: %v", err)
}
if room.ID != 1 {
t.Fatalf("filename must win: room.ID = %d, want 1", room.ID)
}
})
if !strings.Contains(out, "declares id") {
t.Fatalf("expected a room id-mismatch warning, got log %q", out)
}
}
func TestWorldDoesNotWarnWhenRoomIDMatchesOrAbsent(t *testing.T) {
dir := t.TempDir()
writeRoomFile(t, dir, "1.yaml", "id: 1\nname: Match\n")
writeRoomFile(t, dir, "2.yaml", "name: Absent\n")
w := New(dir)
out := captureRoomLog(t, func() {
if _, err := w.LoadRoom(1); err != nil {
t.Fatal(err)
}
if _, err := w.LoadRoom(2); err != nil {
t.Fatal(err)
}
})
if strings.Contains(out, "declares id") {
t.Fatalf("unexpected room id-mismatch warning: %q", out)
}
}
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