Where to find an authoritative and/or verified list of examples for correct (and incorrect) Chinese to Pinyin conversions for words and sentences?
I am specifically looking for corner cases when automated Chinese (simplified/traditional) conversion to pinyin might fail so that I can build a test case to verify correctness.
For example, the character
呢 could be translated to pinyin as any of
ne4 and it looks like some libraries are getting it wrong in certain contexts.