def test_stop_and_start(name: str, data: Dict[str, Any]) -> None:
saver = SeleniumSaver(data["vega-lite"])
bundle1 = saver.mimebundle("png")
saver._stop_serving()
assert saver._provider is None
bundle2 = saver.mimebundle("png")
assert bundle1 == bundle2
def driver():
try:
from altair_saver import SeleniumSaver
except (ImportError, ModuleNotFoundError):
pytest.skip("altair_saver not importable; cannot run driver tests.")
if not SeleniumSaver.enabled():
pytest.skip(
"selenium not properly configured; cannot run driver tests.")
yield altair_transform.driver
SeleniumSaver._stop_serving()