55 lines
2.1 KiB
Python
55 lines
2.1 KiB
Python
import json
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import os
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from backtesting import engine
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def test_run_backtest_caches_by_input_file_signature(monkeypatch, tmp_path):
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history = tmp_path / "history.json"
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thresholds = tmp_path / "thresholds.json"
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weights = tmp_path / "weights.json"
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cache = tmp_path / "cache.json"
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for path in (history, thresholds, weights, cache):
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path.write_text("{}")
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monkeypatch.setattr(engine, "HISTORY_PATH", str(history))
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monkeypatch.setattr(engine, "_THRESH_PATH", str(thresholds))
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monkeypatch.setattr(engine, "ML_WEIGHTS_PATH", str(weights))
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monkeypatch.setattr(engine, "CACHE_PATH", str(cache))
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calls = []
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monkeypatch.setattr(
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engine, "_compute_backtest",
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lambda ml_mode=False: calls.append(ml_mode) or {"ml_mode": ml_mode, "calls": len(calls)},
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)
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engine.clear_backtest_cache()
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first = engine.run_backtest()
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second = engine.run_backtest()
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ml_first = engine.run_backtest(ml_mode=True)
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ml_second = engine.run_backtest(ml_mode=True)
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assert first == second == {"ml_mode": False, "calls": 1}
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assert ml_first == ml_second == {"ml_mode": True, "calls": 2}
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assert calls == [False, True]
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history.write_text('{"changed": true}')
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os.utime(history, None)
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invalidated = engine.run_backtest()
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assert invalidated == {"ml_mode": False, "calls": 3}
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def test_cached_backtest_results_are_isolated_from_caller_mutation(monkeypatch, tmp_path):
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history = tmp_path / "history.json"
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history.write_text("{}")
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monkeypatch.setattr(engine, "HISTORY_PATH", str(history))
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monkeypatch.setattr(engine, "_THRESH_PATH", str(tmp_path / "missing-thresholds.json"))
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monkeypatch.setattr(engine, "ML_WEIGHTS_PATH", str(tmp_path / "missing-weights.json"))
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monkeypatch.setattr(engine, "CACHE_PATH", str(tmp_path / "missing-cache.json"))
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monkeypatch.setattr(engine, "_compute_backtest", lambda ml_mode=False: {"chart_data": [{"score": 10}]})
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engine.clear_backtest_cache()
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first = engine.run_backtest()
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first["chart_data"][0]["score"] = 99
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assert engine.run_backtest()["chart_data"][0]["score"] == 10
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