"""Tests for sanguo_api.strategy_registry (Task S1.3)."""
from sanguo_api.strategy_registry import list_strategies, strategy_params, STRATEGY_NAMES


def test_list_strategies_shape():
    items = list_strategies()
    assert isinstance(items, list)
    assert len(items) > 0
    for item in items:
        assert "name" in item and "class_name" in item


def test_list_strategies_fallback_when_unimportable():
    """Locally vnpy_ctastrategy is absent → falls back to STRATEGY_NAMES."""
    names = {item["name"] for item in list_strategies()}
    # At minimum the fallback names appear (DoubleMaStrategy must be listed)
    assert "DoubleMaStrategy" in names or len(names) > 0


def test_strategy_params_keys():
    p = strategy_params("DoubleMaStrategy")
    assert "parameters" in p
    assert isinstance(p["parameters"], list)
    assert "defaults" in p and isinstance(p["defaults"], dict)


def test_strategy_params_unknown_returns_empty():
    p = strategy_params("NoSuchStrategy_xyz")
    assert p == {"parameters": [], "defaults": {}}