chore: import clean Agent Desk snapshot (2/7)

internal/pkg/config/language_test.go

@@ -0,0 +1,31 @@
+package config
+
+import "testing"
+
+func TestLanguageOrDefault(t *testing.T) {
+	tests := []struct {
+		name string
+		in   string
+		want string
+	}{
+		{name: "blank falls back", in: "", want: "en-US"},
+		{name: "unsupported falls back", in: "fr-FR", want: "en-US"},
+		{name: "chinese", in: "zh-CN", want: "zh-CN"},
+		{name: "english", in: "en", want: "en-US"},
+		{name: "english underscore", in: "EN_us", want: "en-US"},
+		{name: "russian", in: "ru-RU", want: "ru-RU"},
+		{name: "russian short", in: "ru", want: "ru-RU"},
+		{name: "russian underscore", in: "ru_ru", want: "ru-RU"},
+		{name: "russian padded", in: "  ru-RU  ", want: "ru-RU"},
+	}
+
+	for _, tt := range tests {
+		tt := tt
+		t.Run(tt.name, func(t *testing.T) {
+			cfg := Config{Language: tt.in}
+			if got := cfg.LanguageOrDefault(); got != tt.want {
+				t.Fatalf("LanguageOrDefault(%q) = %q, want %q", tt.in, got, tt.want)
+			}
+		})
+	}
+}