from merlin.actions.mapper import ActionMapper
from merlin.config import MerlinConfig


def test_maps_known_gesture():
    config = MerlinConfig()
    mapper = ActionMapper(config)
    assert mapper.map("left_blink") == "left_click"


def test_returns_none_for_unknown_gesture():
    config = MerlinConfig()
    mapper = ActionMapper(config)
    assert mapper.map("nonexistent_gesture") is None


def test_custom_mapping_overrides_default():
    config = MerlinConfig(mappings={"left_blink": "key_enter"})
    mapper = ActionMapper(config)
    assert mapper.map("left_blink") == "key_enter"


def test_reload_picks_up_new_config():
    config = MerlinConfig()
    mapper = ActionMapper(config)
    config.mappings["head_nod"] = "double_click"
    mapper.reload(config)
    assert mapper.map("head_nod") == "double_click"