package preview

import (
	"path/filepath"
	"testing"

	"gitea-mail-templates/tools/upstream"
)

func TestNativeLanguageNames(t *testing.T) {
	snapshot, err := upstream.LoadPinned(filepath.Join("..", ".."))
	if err != nil {
		t.Fatal(err)
	}
	locales := snapshot.Languages()
	names := languageNames(locales)
	if len(names) != len(locales) {
		t.Fatal("language names do not match preview locales")
	}
	for _, locale := range locales {
		if names[locale] == "" || names[locale] == locale {
			t.Errorf("missing native name for %s", locale)
		}
	}
	for locale, want := range map[string]string{"ga-IE": "Gaeilge", "is-IS": "íslenska"} {
		if names[locale] != want {
			t.Errorf("%s: got %q, want %q", locale, names[locale], want)
		}
	}
	if got := languageNames([]string{"!invalid"})["!invalid"]; got != "!invalid" {
		t.Fatalf("invalid locale fallback: %q", got)
	}
}