import unittest.mock
import yaml
from unittest.mock import patch

# Assume setup_mock_environment is defined elsewhere in your file
def setup_mock_environment(mock_exists, mock_isdir, valid_paths):
    # This function mocks os.path.exists and os.path.isdir
    mock_exists.side_effect = lambda path: path in valid_paths
    mock_isdir.side_effect = lambda path: path in valid_paths

class TestParsingOptions(unittest.TestCase):
    def setUp(self):
        # Dummy paths to make the mock environment work
        self.valid_paths = {
            '/dummy/mesa_dir/binary',
            '/dummy/mesa_dir/star',
            '/custom/output',
            '/path/to/my/config.yaml'
        }

    @patch('os.path.isdir')
    @patch('os.path.exists')
    @patch('mesalab.io.config_paths.find_mesa_star_dir_in_release', return_value='/dummy/mesa_dir/star')
    @patch('mesalab.io.config_paths.find_mesa_binary_dir', return_value='/dummy/mesa_dir/binary')
    @patch('mesalab.io.config_paths.set_environment_variables_for_executables')
    def test_yaml_config_overrides_defaults(self, mock_env_vars, mock_find_mesa_binary, mock_find_mesa_star, mock_exists, mock_isdir):
        """Tests that YAML file settings correctly override defaults."""
        # Set up a mock environment where all critical paths are valid
        setup_mock_environment(mock_exists, mock_isdir, self.valid_paths)
    
        # Create a dummy config.yaml content
        yaml_content = {
            'general_settings': {
                'output_dir': '/custom/output',
                'debug': True
            }
        }

        # Create the mock file object with the desired read data
        mock_file = unittest.mock.mock_open(read_data=yaml.dump(yaml_content))
    
        # Patch the open() function with the mock file object
        with patch('builtins.open', mock_file):
            # Your original test logic here, e.g.:
            # config = ConfigParser(config_path='/path/to/my/config.yaml')
            # self.assertEqual(config.general_settings['output_dir'], '/custom/output')
            # self.assertTrue(config.general_settings['debug'])
            pass # Placeholder for your test logic

