67 lines
2.1 KiB
Python
67 lines
2.1 KiB
Python
"""Tests for cache-friendly prompt construction."""
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from __future__ import annotations
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from datetime import datetime as real_datetime
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from pathlib import Path
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import datetime as datetime_module
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from nanobot.agent.context import ContextBuilder
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class _FakeDatetime(real_datetime):
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current = real_datetime(2026, 2, 24, 13, 59)
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@classmethod
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def now(cls, tz=None): # type: ignore[override]
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return cls.current
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def _make_workspace(tmp_path: Path) -> Path:
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workspace = tmp_path / "workspace"
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workspace.mkdir(parents=True)
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return workspace
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def test_system_prompt_stays_stable_when_clock_changes(tmp_path, monkeypatch) -> None:
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"""System prompt should not change just because wall clock minute changes."""
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monkeypatch.setattr(datetime_module, "datetime", _FakeDatetime)
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workspace = _make_workspace(tmp_path)
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builder = ContextBuilder(workspace)
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_FakeDatetime.current = real_datetime(2026, 2, 24, 13, 59)
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prompt1 = builder.build_system_prompt()
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_FakeDatetime.current = real_datetime(2026, 2, 24, 14, 0)
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prompt2 = builder.build_system_prompt()
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assert prompt1 == prompt2
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def test_runtime_context_is_separate_untrusted_user_message(tmp_path) -> None:
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"""Runtime metadata should be a separate user message before the actual user message."""
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workspace = _make_workspace(tmp_path)
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builder = ContextBuilder(workspace)
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messages = builder.build_messages(
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history=[],
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current_message="Return exactly: OK",
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channel="cli",
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chat_id="direct",
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)
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assert messages[0]["role"] == "system"
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assert "## Current Session" not in messages[0]["content"]
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assert messages[-2]["role"] == "user"
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runtime_content = messages[-2]["content"]
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assert isinstance(runtime_content, str)
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assert ContextBuilder._RUNTIME_CONTEXT_TAG in runtime_content
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assert "Current Time:" in runtime_content
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assert "Channel: cli" in runtime_content
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assert "Chat ID: direct" in runtime_content
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assert messages[-1]["role"] == "user"
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assert messages[-1]["content"] == "Return exactly: OK"
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