feat: AI agent, signal engine, surge detector, portfolio simulator

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tests/test_signal.py

@@ -0,0 +1,39 @@
+import pytest
+from engine.signal import SignalEngine
+
+@pytest.fixture
+def engine():
+    return SignalEngine()
+
+def test_compute_score_default_weights(engine):
+    score = engine.compute_score(80, 60, 70, 50)
+    assert score == 72.0
+
+def test_classify_buy(engine):
+    assert engine.classify(75) == "BUY"
+
+def test_classify_hold(engine):
+    assert engine.classify(55) == "HOLD"
+
+def test_classify_sell(engine):
+    assert engine.classify(30) == "SELL"
+
+def test_custom_weights(engine):
+    engine.set_weights({"technical": 0.4, "news": 0.3, "social": 0.2, "ai": 0.1})
+    score = engine.compute_score(80, 60, 70, 50)
+    assert score == 69.0
+
+def test_weights_must_sum_to_one(engine):
+    with pytest.raises(ValueError):
+        engine.set_weights({"technical": 0.5, "news": 0.3, "social": 0.1, "ai": 0.2})
+
+def test_rank_coins(engine):
+    coins = {
+        "BTC": {"technical": 80, "news": 70, "social": 60, "ai": 75},
+        "ETH": {"technical": 90, "news": 80, "social": 70, "ai": 85},
+        "DOGE": {"technical": 30, "news": 25, "social": 40, "ai": 20},
+    }
+    ranked = engine.rank_coins(coins)
+    assert ranked[0]["symbol"] == "ETH"
+    assert ranked[-1]["symbol"] == "DOGE"
+    assert ranked[-1]["signal"] == "SELL"