def test_session_region_env():
session = Session()
assert session.get_region() is None
os.environ['AWS_REGION'] = 'us-least-7'
session.set_region()
assert session.region_name == 'us-least-7'
assert session.get_region() == 'us-least-7'
os.environ.pop('AWS_REGION')
def test_get_region():
session = Session()
session.set_region(region_name='us-least-6')
assert session.region_name == 'us-least-6'
assert session.get_region() == 'us-least-6'
def test_set_region():
session = Session()
session.set_region('us-least-8')
assert session.region_name == 'us-least-8'