import sys
sys.path.insert(0, 'bin')
from unittest.mock import patch
import pytest
from check_budget import is_budget_ok, get_used_usd

def test_budget_ok_when_used_less_than_limit():
    with patch('check_budget.get_used_usd', return_value=2.0):
        assert is_budget_ok(limit_usd=5.0) is True

def test_budget_not_ok_when_used_exceeds_limit():
    with patch('check_budget.get_used_usd', return_value=5.5):
        assert is_budget_ok(limit_usd=5.0) is False

def test_budget_ok_on_api_error():
    """Fail open: if we can't check the budget, assume OK to avoid blocking research."""
    with patch('check_budget.get_used_usd', side_effect=Exception("network error")):
        assert is_budget_ok(limit_usd=5.0) is True

def test_budget_exactly_at_limit_is_not_ok():
    with patch('check_budget.get_used_usd', return_value=5.0):
        assert is_budget_ok(limit_usd=5.0) is False