New TestUtf16OverflowDetection class covers two scenarios:
- test_emoji_text_exceeding_utf16_limit_triggers_overflow_split: feeds
2200 emoji codepoints (4400 UTF-16 units) — under Telegram's
codepoint-equivalent limit but over its UTF-16 limit. Asserts
truncate_message was called with len_fn=utf16_len, confirming the
consumer detected the overflow.
- test_codepoint_only_adapter_falls_back_to_len: documents that
adapters which don't subclass BasePlatformAdapter (or test MagicMocks)
fall back to plain len for backwards compat.
The contributor's PR shipped no tests for the UTF-16 path.
teknium1
121bbe0385