def __init__(self, env_name: str, tmp_dir: Any = None) -> None:
"""
Creates a new virtual environment in a temporary folder.
:param env_name: Name of the virtual environment
:param tmp_dir: Directory where the temporary folder should be created
"""
Preconditions.check_argument(
len(env_name) > 0,
"Cannot create an virtual environment without a name!",
)
self._env_name = env_name
self._packages: List[str] = []
self._env_dir = tempfile.mkdtemp(suffix=env_name, dir=tmp_dir)
virtualenv.create_environment(self._env_dir)
def test_check_argument_false_no_msg(self):
with self.assertRaises(IllegalArgumentException) as context:
Preconditions.check_argument(False)
self.assertTrue(isinstance(context.exception,
IllegalArgumentException))
def test_check_argument_false_msg(self):
m = "message"
with self.assertRaises(IllegalArgumentException) as context:
Preconditions.check_argument(False, m)
self.assertTrue(m in str(context.exception))
def test_check_argument_true_msg(self):
try:
Preconditions.check_argument(True, "message")
except IllegalArgumentException: # pragma: no cover
self.fail("check_argument() raised IllegalArgumentException "
"unexpectedly!") # pragma: no cover