wehub-resource-sync
b4fbd6fe9f
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100 lines
4.0 KiB
Python
100 lines
4.0 KiB
Python
"""Phase 0 regression harness for the relay/connector work.
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Locks the *behavioral contract* that the future ``RelayAdapter`` must reproduce:
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the gateway's ``stream_consumer`` and ``BasePlatformAdapter`` read per-platform
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capabilities through a small, stable surface. A relay adapter that exposes the
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same surface (``MAX_MESSAGE_LENGTH`` attribute, ``message_len_fn`` property,
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``supports_draft_streaming`` probe, and only the abstract methods) slots into
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the existing consumer with no consumer changes.
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These are deliberately *behavioral* (construct an adapter, drive the code,
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assert the observable outcome) rather than source-string snapshots, per the
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repo's "don't write change-detector tests" rule. They pass on ``main`` before
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any ``RelayAdapter`` exists — they describe the contract, not the relay.
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"""
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import inspect
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from gateway.config import Platform, PlatformConfig
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from gateway.platforms.base import BasePlatformAdapter
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class _MinAdapter(BasePlatformAdapter):
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"""Smallest concrete adapter: implements exactly the abstract methods."""
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async def connect(self, *, is_reconnect: bool = False): # pragma: no cover - not called
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return True
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async def disconnect(self): # pragma: no cover - not called
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return None
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async def send(self, *args, **kwargs): # pragma: no cover - not called
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return None
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async def get_chat_info(self, chat_id): # pragma: no cover - not called
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return {}
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def _make() -> BasePlatformAdapter:
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return _MinAdapter(PlatformConfig(), Platform.LOCAL)
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def test_abstract_methods_are_the_known_set():
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"""The relay adapter must implement exactly this set of abstract methods.
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Everything else on BasePlatformAdapter has a default, so ONE generic
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RelayAdapter overriding the right subset is feasible without per-platform
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gateway classes. If a new abstractmethod is added here, the relay design
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(and the cross-repo contract) must be revisited — hence the lock.
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NOTE: this is four methods, not three — ``get_chat_info`` is abstract too
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(defined far below the connect/disconnect/send cluster in base.py). The
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RelayAdapter must implement it (proxying a chat-info lookup to the
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connector, or returning a descriptor-derived stub).
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"""
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abstract = {
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name
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for name, member in inspect.getmembers(BasePlatformAdapter)
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if getattr(member, "__isabstractmethod__", False)
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}
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assert abstract == {"connect", "disconnect", "send", "get_chat_info"}
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def test_message_len_fn_defaults_to_len():
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"""message_len_fn is the per-platform length-unit hook (Telegram overrides
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it for UTF-16). The default is plain ``len``; the relay adapter will
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override it from its negotiated descriptor's ``len_unit``."""
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inst = _make()
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assert inst.message_len_fn("hello") == 5
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def test_supports_draft_streaming_defaults_false():
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"""Draft streaming is opt-in per platform; the consumer falls back to the
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edit-based path when False. The relay adapter flips this from its
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descriptor's ``supports_draft_streaming`` flag."""
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inst = _make()
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assert inst.supports_draft_streaming() is False
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def test_stream_consumer_reads_max_message_length_by_attribute():
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"""The consumer resolves the per-platform char limit by reading the
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adapter's ``MAX_MESSAGE_LENGTH`` attribute (defaulting to 4096 when
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absent). The relay adapter exposes this as an attribute set from its
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descriptor — so a relay adapter that sets the attribute is chunked
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correctly with no consumer change.
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"""
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from gateway import stream_consumer
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class _NoLimit:
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pass
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class _WithLimit:
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MAX_MESSAGE_LENGTH = 1234
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assert getattr(_NoLimit(), "MAX_MESSAGE_LENGTH", 4096) == 4096
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assert getattr(_WithLimit(), "MAX_MESSAGE_LENGTH", 4096) == 1234
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# The consumer depends on BasePlatformAdapter for the message_len_fn
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# isinstance guard (import-level contract the relay adapter satisfies by
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# subclassing BasePlatformAdapter).
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assert stream_consumer._BasePlatformAdapter is BasePlatformAdapter
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