def test_attributes_from_environment_variables():
"""Test that the LSF environment takes the attributes from the environment variables."""
env = LSFEnvironment()
assert env.creates_children()
assert env.master_address() == "10.10.10.0"
assert env.master_port() == 10234
assert env.world_size() == 4
assert env.global_rank() == 3
assert env.local_rank() == 1
env.set_global_rank(100)
assert env.global_rank() == 3
env.set_world_size(100)
assert env.world_size() == 4
assert LSFEnvironment.is_using_lsf()
def test_manual_master_port_and_address():
"""Test a user can set the port manually through the MASTER_PORT env variable."""
env = LSFEnvironment()
assert env.master_port() == 4321