import pytest
from sunholo.utils import config

# Test for the `load_config` function
def test_load_config():
    # Assuming the function is supposed to load a configuration from a file
    # and return a dictionary with the configuration data
    expected_config = {"key": "value"}
    with pytest.raises(FileNotFoundError):
        config.load_config("non_existent_file")
    with pytest.mock.patch("builtins.open", pytest.mock.mock_open(read_data="key: value"), create=True):
        assert config.load_config("mock_file.yaml") == expected_config

# Test for the `load_config_key` function
def test_load_config_key():
    # Assuming the function is supposed to load a specific key from the configuration
    expected_value = "value"
    with pytest.raises(KeyError):
        config.load_config_key("non_existent_key", "mock_vector_name")
    with pytest.mock.patch("sunholo.utils.config.load_all_configs", return_value={"mock_vector_name": {"key": "value"}}):
        assert config.load_config_key("key", "mock_vector_name") == expected_value

# Test for the `get_module_filepath` function
def test_get_module_filepath():
    # Assuming the function is supposed to return the absolute path of a module file
    expected_path = "/absolute/path/to/module/file"
    with pytest.mock.patch("os.path.dirname", return_value="/absolute/path/to"):
        assert config.get_module_filepath("module/file") == expected_path

# Test for the `fetch_config` function
def test_fetch_config():
    # Assuming the function is supposed to fetch configuration from a cloud storage bucket
    expected_update_time = "2022-01-01T00:00:00Z"
    with pytest.mock.patch("google.cloud.storage.Client") as mock_client:
        mock_bucket = mock_client.return_value.get_bucket.return_value
        mock_blob = mock_bucket.get_blob.return_value
        mock_blob.updated = expected_update_time
        assert config.fetch_config("bucket_name", "blob_name") == expected_update_time
        mock_bucket.get_blob.return_value = None
        assert config.fetch_config("bucket_name", "blob_name") is None
