def test_successful_yaml(self):
try:
import yaml # noqa
except ImportError:
# Only run this test if yaml is available
return
main(argv=["-f", "yaml"], stdin=self.stream)
def test_successful_dot(self):
main(argv=["-f", "dot"], stdin=self.stream)
def test_successful_py(self):
main(argv=["-f", "py"], stdin=self.stream)
