fix bot lifecycle and docs

l10n_test.go

@@ -0,0 +1,77 @@
+package laniakea
+
+import (
+	"fmt"
+	"sync"
+	"testing"
+)
+
+func TestL10nTranslateUsesFallbackAndKey(t *testing.T) {
+	l10n := NewL10n("en").
+		AddDictEntry("greeting", DictEntry{"en": "Hello", "ru": "Privet"}).
+		AddDictEntry("partial", DictEntry{"ru": "Tolko ru"})
+
+	tests := []struct {
+		name string
+		lang string
+		key  string
+		want string
+	}{
+		{name: "exact match", lang: "ru", key: "greeting", want: "Privet"},
+		{name: "fallback language", lang: "es", key: "greeting", want: "Hello"},
+		{name: "missing fallback returns key", lang: "en", key: "partial", want: "partial"},
+		{name: "unknown key returns key", lang: "en", key: "unknown", want: "unknown"},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := l10n.Translate(tt.lang, tt.key); got != tt.want {
+				t.Fatalf("unexpected translation: got %q want %q", got, tt.want)
+			}
+		})
+	}
+}
+
+func TestL10nAddDictEntryCopiesInput(t *testing.T) {
+	l10n := NewL10n("en")
+	entry := DictEntry{"en": "Hello"}
+
+	l10n.AddDictEntry("greeting", entry)
+	entry["en"] = "Mutated"
+
+	if got := l10n.Translate("en", "greeting"); got != "Hello" {
+		t.Fatalf("unexpected translation after external mutation: got %q", got)
+	}
+}
+
+func TestL10nZeroValueIsUsable(t *testing.T) {
+	var l10n L10n
+
+	l10n.AddDictEntry("greeting", DictEntry{"en": "Hello"})
+
+	if got := l10n.Translate("en", "greeting"); got != "Hello" {
+		t.Fatalf("unexpected translation from zero-value l10n: got %q", got)
+	}
+}
+
+func TestL10nConcurrentAccess(t *testing.T) {
+	l10n := NewL10n("en")
+	l10n.AddDictEntry("base", DictEntry{"en": "Hello"})
+
+	var wg sync.WaitGroup
+	for i := 0; i < 8; i++ {
+		wg.Add(1)
+		go func(i int) {
+			defer wg.Done()
+			for j := 0; j < 100; j++ {
+				l10n.AddDictEntry(fmt.Sprintf("key-%d-%d", i, j), DictEntry{"en": "value"})
+				_ = l10n.Translate("en", "base")
+			}
+		}(i)
+	}
+	wg.Wait()
+
+	if got := l10n.Translate("en", "base"); got != "Hello" {
+		t.Fatalf("unexpected translation after concurrent access: got %q", got)
+	}
+}