from misago.acl import algebra


def test_greatest_value_is_returned():
    assert algebra.greater(1, 3) == 3
    assert algebra.greater(4, 2) == 4
    assert algebra.greater(2, 2) == 2
    assert algebra.greater(True, False) == True


def test_greatest_or_zero_value_is_returned():
    assert algebra.greater_or_zero(1, 3) == 3
    assert algebra.greater_or_zero(4, 2) == 4
    assert algebra.greater_or_zero(2, 2) == 2
    assert algebra.greater_or_zero(True, False) == False
    assert algebra.greater_or_zero(2, 0) == 0
    assert algebra.greater_or_zero(0, 0) == 0
    assert algebra.greater_or_zero(0, 120) == 0


def test_lower_value_is_returned():
    assert algebra.lower(1, 3) == 1
    assert algebra.lower(4, 2) == 2
    assert algebra.lower(2, 2) == 2
    assert algebra.lower(True, False) == False


def test_lowest_non_zero_value_is_returned():
    assert algebra.lower_non_zero(1, 3) == 1
    assert algebra.lower_non_zero(0, 2) == 2
    assert algebra.lower_non_zero(1, 2) == 1
    assert algebra.lower_non_zero(0, 0) == 0


def test_acls_are_be_added_together():
    test_acls = [
        {
            'can_see': 0,
            'can_hear': 0,
            'max_speed': 10,
            'min_age': 16,
            'speed_limit': 50,
        },
        {
            'can_see': 1,
            'can_hear': 0,
            'max_speed': 40,
            'min_age': 20,
            'speed_limit': 0,
        },
        {
            'can_see': 0,
            'can_hear': 1,
            'max_speed': 80,
            'min_age': 18,
            'speed_limit': 40,
        },
    ]

    defaults = {
        'can_see': 0,
        'can_hear': 0,
        'max_speed': 30,
        'min_age': 18,
        'speed_limit': 60,
    }

    acl = algebra.sum_acls(
        defaults,
        acls=test_acls,
        can_see=algebra.greater,
        can_hear=algebra.greater,
        max_speed=algebra.greater,
        min_age=algebra.lower,
        speed_limit=algebra.greater_or_zero,
    )

    assert acl['can_see'] == 1
    assert acl['can_hear'] == 1
    assert acl['max_speed'] == 80
    assert acl['min_age'] == 16
    assert acl['speed_limit'] == 0