def test_set():
setknob = Knob('KNOB_NAME', 'KNOB_VAL')
assert setknob.get_type() == str
assert setknob.get() == 'KNOB_VAL'
setknob.set('XX123')
assert setknob.get() == 'XX123'
def test_typle_from_env():
os.environ['TUPLE'] = 'DEAD BEEF COFFEE'
assert type(os.environ['TUPLE']) == str
knob = Knob('LIST', ('LOVE', 'THEY', 'NEIGHBOUR'))
assert knob.get_type() == tuple
assert knob() == ('DEAD', 'BEEF', 'COFFEE')
def test_cast_to_string():
rope = Knob('ROPE_TO_HANG_BY', 'A stiff rope for yer nek, mate')
assert rope.get_type() == str
def test_list_from_env():
os.environ['LIST'] = 'DEAD BEEF COFFEE'
assert type(os.environ['LIST']) == str
knob = Knob('LIST', ['LOVE', 'THEY', 'NEIGHBOUR'])
assert knob.get_type() == list
assert knob() == ['DEAD', 'BEEF', 'COFFEE']