import unittest
from unittest.mock import patch, MagicMock
import os

import pandas as pd
from pyrheadb.RheaDB import RheaDB  # Adjust this import according to your actual module structure.

class TestRheaDB(unittest.TestCase):
    def setUp(self):
        """Set up test fixtures, if any."""
        self.env_var = 'RHEADB_LOC'
        self.current_dir = os.path.dirname(__file__)  # Gets the directory where this test file resides
        test_rhea_db_path = os.path.join(self.current_dir, 'test_rhea_db')
        os.environ[self.env_var] = test_rhea_db_path
        self.rhea_db = RheaDB(rhea_versions_folder_location=test_rhea_db_path)

    @patch('urllib.request.urlretrieve')
    def test_get_current_rhea_version(self, mock_urlretrieve):
        """Test fetching the current Rhea version from the properties file."""
        mock_urlretrieve.return_value = None
        version_data = "rhea-version=132"  # String mimicking file content
        with patch('builtins.open', unittest.mock.mock_open(read_data=version_data)) as mock_file:
            version = self.rhea_db._RheaDB__get_current_rhea_version()
            mock_file.assert_called_with('rhea-release.properties')
            self.assertEqual(version, 132)

    # More tests can be added for the remaining methods following similar patterns.

if __name__ == '__main__':
    unittest.main()