hermes-mcp/tests/test_decision_engine.py

from hermes_mcp.decision_engine import assess_wallet_state, make_decision, normalize_strategy_snapshot, score_strategy_fit


def test_assess_wallet_state_detects_depleted_base_side():
    concern = {"account_id": "a1", "market_symbol": "xrpusd", "base_currency": "XRP", "quote_currency": "USD"}
    account_info = {
        "balances": [
            {"asset_code": "XRP", "available": 1},
            {"asset_code": "USD", "available": 1000},
        ]
    }
    wallet = assess_wallet_state(account_info=account_info, concern=concern, price=2.0)
    assert wallet["inventory_state"] == "depleted_base_side"
    assert wallet["rebalance_needed"] is True
    assert wallet["grid_ready"] is False


def test_score_strategy_fit_penalizes_grid_when_wallet_unbalanced():
    strategy = normalize_strategy_snapshot({
        "id": "grid-1",
        "strategy_type": "grid_trader",
        "mode": "active",
        "account_id": "a1",
        "state": {},
        "config": {},
    })
    narrative = {"stance": "constructive_bullish", "opportunity_map": {"continuation": 0.7, "mean_reversion": 0.1, "reversal": 0.1, "wait": 0.1}}
    wallet_state = {"inventory_state": "depleted_base_side", "rebalance_needed": True}
    fit = score_strategy_fit(strategy=strategy, narrative=narrative, wallet_state=wallet_state)
    assert fit["score"] < 0
    assert any("grid" in block or "wallet" in block for block in fit["blocks"])


def test_make_decision_replaces_grid_when_directional_and_unbalanced():
    concern = {"id": "c1", "account_id": "a1", "market_symbol": "xrpusd", "base_currency": "XRP", "quote_currency": "USD"}
    narrative = {
        "stance": "constructive_bullish",
        "confidence": 0.72,
        "opportunity_map": {"continuation": 0.75, "mean_reversion": 0.1, "reversal": 0.05, "wait": 0.1},
    }
    wallet_state = {
        "inventory_state": "base_heavy",
        "rebalance_needed": True,
        "grid_ready": False,
        "base_ratio": 0.8,
        "quote_ratio": 0.2,
    }
    strategies = [
        {"id": "grid-1", "strategy_type": "grid_trader", "mode": "active", "account_id": "a1", "state": {}, "config": {}},
        {"id": "trend-1", "strategy_type": "trend_follower", "mode": "off", "account_id": "a1", "state": {}, "config": {}},
        {"id": "protect-1", "strategy_type": "exposure_protector", "mode": "off", "account_id": "a1", "state": {}, "config": {}},
    ]
    decision = make_decision(concern=concern, narrative_payload=narrative, wallet_state=wallet_state, strategies=strategies)
    assert decision.mode == "act"
    assert decision.action == "replace_with_exposure_protector"
    assert decision.target_strategy == "protect-1"