def test_get_receive_sequence_number1():
"""test for extracting min. number"""
iframe = IFrame()
iframe.set_control(bytes([112]))
assert 0 == iframe.get_receive_sequence_number()
def test_get_receive_sequence_number2():
"""test for correct return type"""
iframe = IFrame()
assert isinstance(iframe.get_receive_sequence_number(), int)
def test_get_receive_sequence_number0():
"""test for extracting max number"""
iframe = IFrame()
# 119 = 0x77 = 01110111
iframe.set_control(bytes([119]))
assert 7 == iframe.get_receive_sequence_number()
