Improve tests (#854)

Recover commented out tests, 
Improve usage of helper in driver, 
Added data-wd-key for test to use instead of classes
Moved all non tsx file to a single folder (lib) instead of lib and utils

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Co-authored-by: Yuri Astrakhan <yuriastrakhan@gmail.com>

src/libs/format.ts

@@ -0,0 +1,3 @@
+export function formatLayerId (id: string | undefined) {
+  return id === "" ? "[empty_string]" : `'${id}'`;
+}