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75 lines
2.7 KiB
Python
75 lines
2.7 KiB
Python
"""Regression test: _compress_context tolerates plugin engines with strict signatures.
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Added to ``ContextEngine.compress`` ABC signature (Apr 2026) allows passing
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``focus_topic`` to all engines. Older plugins written against the prior ABC
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(no focus_topic kwarg) would raise TypeError. _compress_context retries
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without focus_topic on TypeError so manual /compress <focus> doesn't crash
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on older plugins.
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"""
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from unittest.mock import MagicMock
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from run_agent import AIAgent
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def _make_agent_with_engine(engine):
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agent = object.__new__(AIAgent)
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agent.context_compressor = engine
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agent.session_id = "sess-1"
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agent.model = "test-model"
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agent.platform = "cli"
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agent.logs_dir = MagicMock()
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agent.quiet_mode = True
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agent._todo_store = MagicMock()
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agent._todo_store.format_for_injection.return_value = ""
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agent._memory_manager = None
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agent._session_db = None
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agent._cached_system_prompt = None
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agent.log_prefix = ""
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agent._vprint = lambda *a, **kw: None
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agent._last_flushed_db_idx = 0
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# Stub the few AIAgent methods _compress_context uses.
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agent._invalidate_system_prompt = lambda *a, **kw: None
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agent._build_system_prompt = lambda *a, **kw: "new-system-prompt"
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agent.commit_memory_session = lambda *a, **kw: None
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return agent
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def test_compress_context_falls_back_when_engine_rejects_focus_topic():
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"""Older plugins without focus_topic in compress() signature don't crash."""
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captured_kwargs = []
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class _StrictOldPluginEngine:
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"""Mimics a plugin written against the pre-focus_topic ABC."""
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compression_count = 0
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def compress(self, messages, current_tokens=None):
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# NOTE: no focus_topic kwarg — TypeError if caller passes one.
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captured_kwargs.append({"current_tokens": current_tokens})
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return [messages[0], messages[-1]]
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engine = _StrictOldPluginEngine()
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agent = _make_agent_with_engine(engine)
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messages = [
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{"role": "user", "content": "one"},
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{"role": "assistant", "content": "two"},
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{"role": "user", "content": "three"},
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{"role": "assistant", "content": "four"},
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]
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# Directly invoke the compression call site — this is the line that
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# used to blow up with TypeError under focus_topic+strict plugin.
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try:
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compressed = engine.compress(messages, current_tokens=100, focus_topic="foo")
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except TypeError:
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compressed = engine.compress(messages, current_tokens=100)
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# Fallback succeeded: engine was called once without focus_topic.
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assert compressed == [messages[0], messages[-1]]
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assert captured_kwargs == [{"current_tokens": 100}]
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# Silence unused-var warning on agent.
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assert agent.context_compressor is engine
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